Platinum Chemicals offer various internal waterproofing solutions. We stock a number of different internal waterproofing products such as Damp Proofing Membranes, Tanking Products, Damp Proof Paints and Epoxy Floor Coatings.
Many issues relating to Rising Damp or Penetrating Damp cause problems such as spoiled decorations and internal walls. These particular problems must be rectified to prevent future damage. Our wide range of internal waterproofing solutions can help with the fight against rising and penetrating damp.
Our range of Tanking Products may also be used in basements to prevent water penetration from hydrostatic pressure.
Wykamol Group | Basement Tanking
IMPORTANT: HYDRADRY IS NOW SUPPLIED IN 20KG BAGS. A 20KG BAG WILL MIX WITH 5.2L OF WATER (RATHER THAN 6.5L, AS IT WAS WITH A 25KG BAG PREVIOUSLY).
HydraDry is a cementitious Tanking Slurry designed for application to the internal surfaces of walls and the associated solid floors of cellars, basements and other areas below ground level and subject to penetrating dampness.
The HydraDRY system prevents ingress of liquid water and works by forming a physical and chemical bond with the substrate. It provides a monolithic waterproof membrane yet still allows some vapour transmission thereby reducing the risk of condensation.
HydraDRY can provide sufficient protection of a ‘Grade 3’ basement as defined in Table 1 of BS8102:2009 and conforms with Category 7 of the BCA Basement Waterproofing Design and site guides.
HydraDRY is supported by BBA Certification Certificate No: 02/3961.
Available in 20Kg bags (Inside a mixing bucket).
BBA Approved
Waterproofs cellars and basements.
Suitable for brick, stone, block, concrete, etc.
Resists hydrostatic pressure up to 5 metres head
Can be applied to saturated surfaces
Easy brush application
Suitable for use in contact with potable water
Take the usual labour hygiene into account.
PPE should be worn during application. See our Safety & PPE Products.
Consult label and material safety data sheet for more information.
It is essential that preparation of the surfaces to be tanked is carried out to a very high standard to ensure that a good physical key is obtained. All fixtures, fittings (e.g. timber wall plugs),plaster or other wall coverings should be removed.
It is strongly recommended that grit blasting is used to prepare the wall surface although where major contamination is present needle guns or “comb” hacking systems (resulting in a rough-textured finish) can be used.
Where necessary defective brickwork should be replaced and poor mortar joints repaired. If the substrate is irregular, e.g. random stone construction, a 3:1 sand / cement scratch coat should be applied to provide a sound, even base prior to the application of HydraDRY.
It is important that good quality sharp, washed sand is used; a waterproofing additive may be included provided the application of HydraDRY is commenced within 48 hours.
N.B. It is essential to determine the suitability of the substrate to accept a cement based coating. All traces of any gypsum-based materials must be completely removed. Where it is known or suspected that high levels of salt contamination i.e. sulphates, nitrates are present in the substrate, mortar joints should be deeply raked out and an SBR-sulphate resisting cement primer and re-pointing mix used prior to the application of HydraDRY. Where the building structure has cracked and / or is subject to subsidence, it should be established whether the movement of ground is still active.
HydraDRY is a relatively rigid material and is not recommended where movement is likely (e.g. under roads, pavements etc.)
Where active water leaks are present it must be established that the structure is capable of taking the increased load which may result from waterproofing work. Alternatively, take measures to reduce the water table. If a few minor leaks exist these should be cut out to leave a square hole in the substrate.The holes can then be filled using Water-Stop Plugging Compound mixed to stiff putty. It is important that Water-Stop is pushed firmly into the hole to ensure that it is totally filled. If severe leaks are experienced pressure vents should be formed by following a similar procedure, but incorporating hollow pipes into the holes, fixed using Water-Stop.
The water can be drained into buckets or directly into the drainage system. HydraDRY is then applied in the normal manner. When the HydraDRY system has cured each vent is carefully removed and the hole plugged with Water-Stop prior to the application of two coats of HydraDRY.
Wall / floor and corner joints usually need special preparation to avoid sharp changes of angle in the tanking membrane.
The joints should be thoroughly raked out, cleaned and wetted prior to application of a Fillet Seal or an SBR / Cement Primer and SBR modified 3:1 sand / cement fillet.
The HydraDRY membrane should be applied the full height of any soil retaining structures and at least 150mm beyond the damp-proof course (if a chemical DPC is being installed this should be a water-based or injection mortar-type system and the HydraDRY applied before DPC reduced suction).
In free-standing basement walls it may be possible to install a horizontal DPC to control capacity moisture movement at or just above floor level, but only if the resting water table height is never above floor level. Similarly, vertical DPC’s (set back approx. 500mm) may be installed in such walls to ‘isolate’ them from soil retaining structures as long as HydraDRY is applied a full 100mm back from the wall / wall joint.
Alternatively, if any doubt exists concerning water table heights, all walls and floors in basements should be tanked.
Where external ground level is above basement ceiling level and of solid masonry construction it will be necessary to treat the ceiling with HydraDRY. Wooden ceilings with joists bearing on walls to be treated with HydraDRY should be isolated and reformed and/or other measures taken to protect the timbers from decay (further advice available on request).
In the majority of tanking operations it is preferable to replace existing concrete floors with a new floor incorporating a damp-proof membrane.
However, if the floor is known to be structurally sound and the surface in good mechanical condition it is possible to use HydraDRY as a DPM followed by the application of a suitable screed.
However, vapour impermeable or moisture sensitive floor coverings such as vinyls or timber flooring should be avoided unless a physical DPM complying with CP102 is used.
Ensure powder is stored at room temperature for a minimum 12 hours prior to use.
During application the temperature of both the substrate and materials must not fall below 5°C.
In winter months avoid using chilled mixing water. Use warm water (20°C) for HydraDRY and Water-Stop.
Immediately prior to application of HydraDRY or backing coats the substrate to be treated should be cleared of all dust etc. and thoroughly wetted with clean water. At the time of application all surfaces must be damp but free of surface water.
HydraDRY powder should be mixed with clean water to a brushable slurry paste consistency (approx. 5.2 litres / 20kg HydraDRY powder). Mixed material should be used within 30 minutes.
HydraDRY should be applied using a stiff bristled brush or broom (wash frequently to avoid clogging). Two coats of HydraDRY should be applied at a thickness of 1.5mm per coat. It is essential that the first coat is brushed well into the surface to ensure a good bond with the substrate. The second coat may be applied as soon as the initial application has dried sufficiently to form a firm base. This will normally be between 2-16 hours depending upon site conditions (allow more time for curing then temperatures fall below 10°C).
Where HydraDRY is applied by towel (reduce gauging water slightly) this must be restricted to the second coat and a “stippled” finish left (use applicator brush) to provide a physical key for subsequent re-plastering.
HydraDRY should not be applied in a thickness greater than 3-4mm (2 coats). Where each application cannot be finished within a single working day it is essential than an overlap of at least 250mm is used to prevent butt joints.
Work should not be stopped at corners or other natural breaks in the construction.
If the basement has a known history of aggressive salts specific precaution should be taken to deal with these (the type of salts present should be determined by analysis).
In particular HydraDRY is not suitable for use in areas of high sulphate content (where the sulphate content exceeds Class 3 limits of BRE deposit 363.) It may be possible to impart improved salt resistance to HydraDRY by incorporating an SBR Bonding Agent into the gauging liquid (i.e. 1:1 with water). In other situations an SBR Primer / SBR Render based on sulphate resisting cement may be advisable.
In very severe cases of poor wall stability or acute salting conditions consideration should be given to alternative strategies for achieving a dry wall / floor surface.
When a new floor is being laid, the physical membrane should be cut off at the top of the slab and the procedure noted under wall / floor joint followed prior to the laying of the final screed.
Detailing at the wall floor joint must be carried out to a high standard. Fillet Seal is a cementitous mix designed specifically for the task.
Alternatively two coats of an SBR primer bonding coat are applied (1 part SBR : 2 parts cement by volume).
As soon as possible thereafter a 3:1 sand / cement mix incorporating a good quality sharp washed sand and gauged with SBR : Water (1:1) is used to form a fillet at least 50mm high and 50mm deep at the wall / floor joint.
The fillet is trowel applied taking care not to pierce the SBR primer coat. The edges of the fillet should be 'feathered' to give a smooth curved appearance (this may be achieved by using a glass bottle).
As soon as the fillet has set firm the application of HydraDRY should proceed (if the SBR modified fillet fully cures a fresh coat of bonding primer will be necessary to re-key the surface).
Where the HydraDRY is not being used over the whole floor area it must extend a minimum 250mm across the floor (the second coat should stop 50mm back from the first). If a sandwich bitumen membrane is being incorporated this may be applied directly to the HydraDRY and screeded in the normal manner.
Bitumen emulsions are unsuitable for these situations.
N.B. If the wall / floor joint is a source of active water leaks cut a square-shaped chase (not a v-notch) at the base of the wall and fill with Water-Stop before proceeding.
Approximately 3kg per square metre per coat (two coats recommended).
Re-plastering is an integral part of the tanking specification, protects HydraDRY from impact damage and reduces the incidence of condensation.
Renovating Plaster is particularly recommended as a means to avoid cold surfaces but a sand : cement plaster incorporating RenderProof Waterproofer may also be used.
Re-plastering should be carried out in accordance with BS5492:1990 and the appropriate Replastering Specification Data Sheet as soon as the final HydraDRY coat has set to form a firm base (12-48 hours). If the HydraDRY is left longer prior to re-plastering an SBR-modified cement slurry may be required to overcome low suction in the substrate.
N.B.Gypsum based plasters must not be used in direct contact with HydraDRY.
Use only stainless steel metal angle beads to form details on external corners etc. (use SBR-modified mortar to fix). In hot weather keep the plaster / tanking moist (e.g. mist spraying, polythene sheet) over the first 48-72 hours to encourage full curing and strength development.
The success of any tanking system depends upon the integrity of the system being maintained. Therefore, conventional fixing methods, i.e. screws etc. cannot be used and alternative fixing methods have to be employed.
For lightweight fixings it is suggested that adhesives are used to stick items such as skirting boards, electrical conduit etc. A wide range of products are available for this purpose, e.g. polyurethane mastic’s.
For heavy duty fixing points, before application of HydraDRY, oversized holes should be drilled. These can then be plugged with Water-Stop and a plastic insert.
For major fixings a larger size hole should be prepared, i.e. a half brick and the same basic procedure followed.
In exceptional circumstances heavy duty fixings may be made after the completion of the HydraDRY system by using chemical anchor systems. i.e. epoxy mortars, two-pack resin systems, but this is not recommended.
On completion of the HydraDRY system it is important that the system is allowed to dry out naturally without the use of radiant or fan heaters, dehumidifiers or forced ventilation (convector heaters to provide temperatures above 10°C may be acceptable).
Once the surface is substantially dry, paint or other finishes may be applied, it is essential that all decoration is vapour permeable and it is suggested that an emulsion paint is used.
In tanked basements the provision of adequate background heating and ventilation is essential to ensure condensation risks are controlled.
Water Stop (Formerly named HydraPLUG) is a fast setting, expanding water stop plugging and repair mortar.
When mixed with clean water and applied correctly it is formulated for the rapid patching and plugging of active water leaks and seepage in concrete and masonry.
Water Stop is designed to expand as it sets to ensure a permanent water tight seal is achieved and in a cured formed displays similar properties to concrete.
Water Stop is use to stop active water leaks or seepage under pressure through holes, joints and cracks in concrete or masonry walls, swimming pools, water storage facilities, tunnels, fountains, cisterns, water channels, ponds, pipes, basements, foundations and retaining walls.
Water Stop is also ideal for used for rapid anchoring of bolts, conduits, pipes, sanitary equipment, etc.
Available in 5Kg Buckets (2 x 2.5Kg Packs in each Bucket).
Instantly Stops Leaks in Concrete & Masonry
Provides a Permanent Watertight Seal
Fast Setting and Rapid Curing
Resists Positive & Negative Water Pressure
Suitable for use Above & Below Ground
Suitable for Internal and External use
Safe to use in contact with Potable Water
All areas to be repaired and plugged should be free from mildew, dirt, dust and any loose material.
Clean the hole, crack or joint thoroughly by wire brushing, chiselling or scraping loose materials until a clean, sound substrate remains.
Areas to be patched should be cut back and given a good mechanical key. Feather edges are not allowed.
For dry repair applications, wet the repair area with water leaving it surface saturated dry (SSD) during the repair.
To seal leaks and cracks openings must be chased out to approx 20 mm square. The edges must be square or under cut, avoiding V-shaped cuts. All loose material and debris should be removed.
Due to the fast setting nature of Water Stop, it is important to organise the work space before mixing commences. Ensure the person undertaking the repair is situated close to the repair area and required equipment to carry out the repair is present.
To achieve a 'stiff' mortar, the recommended water addition is 200ml - 220ml of clean water per 1Kg of Water Stop.
For best results the temperature of the mixing water should be between 15°C and 25°C.
Wearing suitable gloves, mixing is ideally done by hand.
Add the recommended water addition into the bucket.
Add the powder to the water and mix quickly and thoroughly.
Roll the mixture between your hands until the material starts become warm and a pliable, putty like consistency is developed.
Immediately use Water Stop.
Important: Mix only enough material for immediate use as Water Stop sets in 2 - 4 minutes and cannot be reworked once it has set.
No priming is required but for dry repair applications, make sure the surface is Surface Saturated Dry (SSD).
To stop surface leaks or seepage not under pressure:
Starting at the top of the hole or crack, work your way down. Trowel apply or hand kneed the mixed mortar firmly into place, ensuring maximum contact with the substrate before the material sets.
Remove any excess material to form a uniform surface.
To stop leaks under pressure or under water:
Maintain constant pressure on the applied material until final set has been achieved.
Water Stop can be used in cold conditions down to 1°C.
It is advised to use warm water, 20°C to accelerate strength development.
The material should not be applied when substrate and / or ambient air temperature is less than 1°C.
Set and cure times will be increased at low temperatures.
When using Water Stop in temperatures above 35°C, the material should be stored in the shade and it is advised to use cooler water, around 20°C.
Set and cure times will be reduced in hot temperatures.
Final setting time is less than 5 minutes. Once the placed Water Stop has stiffened sufficiently, dampen with clean water and maintain in a damp condition for a minimum of 15 minutes.
SBR Latex is a Styrene Butadiene Copolymer Latex which is specially modified to be compatible with cement based mixes (ordinary portland cement or high aluminium cement).
It may be incorporated into cementitious renders, screeds or patching mixes in order to improve adhesion and abrasion resistance.
It can be used internally or externally and in areas of continuous or intermittent water contact.
SBR Latex improves the chemical and water resistance of cementitious mixes and is recommended for use in effluent tanks, dairies, food factories, fertiliser stores etc. When used in a cementitious mix, SBR Latex has the following special properties:
Suitable for use in damp conditions
Imparts high water / salt resistance when incorporated in a mix
Improves adhesion
Allows thinner screeds to be laid
Improves workability
Allows a reduction in water content
Improves flexibility and reduces cracking
Improves resistance to abrasion and chemicals
Available in 5 Litre & 25 Litre Containers
Where specific building methods are covered by British Standard Codes of Practice, ie. rendering and floor screeds, these should be followed as a guide to good building practice.
All surfaces must be sound and free from laitience, paint, grease, oil, surface water or any other contaminant which may adversely affect adhesion. Surfaces of high suction should be thoroughly dampened before the application of bonding primers.
Remove excess water from the surface before continuing. The sand to be used in the mixes should be well graded, clean and meet the appropriate British Standards.
Additional preparation is required where steel reinforcement is exposed.
Wire brush or preferably grit blast to remove rust and scale, apply 'Bonding Primer 2' liberally by brush to the prepared exposed steel and allow to become firm.
Dampen the surrounding substrate and apply 'Bonding Primer 2' over the entire area to be patched.
Finishing: Whilst the final Bonding Primer coat is still wet / green, patch onto the Bonding Primer using 'Mix 1'.
Bonding Primer: Apply 'Bonding Primer 1' by brush to both the prepared surfaces.
Finishing: Whilst the Bonding Primer mix is still wet / green, butter one of the surfaces with 'Mix 1'.
Provide temporary support where necessary.
Note: For thin joints use fine graded sands (BS1199; ‘Type B’), keeping the water content to the minimum.
Bonding Primer: Apply 'Bonding Primer 1' into the dampened joints. Prime only small areas which can be jointed easily before the primer dries or sets.
Finishing: Whilst the Bonding Primer is still wet / green, point the joints with 'Mix 1'.
Bonding Primer: Apply 'Bonding Primer 1' by brush to the dampened surface.
For difficult surfaces, i.e. weak and porous substrates, apply a coat of 'Bonding Primer 2' brushing vigorously into the surface, stippling to provide a key.
Allow to harden (minimum 16 hours, maximum 3 days), then apply one coat of 'Bonding Primer 1' by brush onto the dry primer coat, again stippling to provide a key.
Finishing: Whilst the Bonding Primer is still wet / green, apply a render of 'Mix 1' to a minimum thickness of 6mm. Lightly scratch to provide a key and apply a second coat of 'Mix 1', maximum 6mm thick, when the first coat is firm (approx. 6 hours).
Prevent the rendering from drying out during the first 48 hours, eg. by mist spraying with water when firm.
For new construction or existing sound structures eg. dense concrete, engineering bricks etc., (minimum compressive strengths 40 N/mm²).
Additional Preparation: Rake out all unsound joints and re-point as detailed under ‘Application 3 - Pointing’. Allow to cure for a minimum 24 hours before continuing.
Bonding Primer and Finishing: Apply 'Bonding Primer 2', brushing vigorously into the dampened surface, stippling to provide a physical key.
Bed a fillet of 'Mix 1' at the wall and floor junction, whilst the Bonding Primer is still wet/green.
Allow to harden (minimum 16 hours, maximum 3 days) then apply a second coat of 'Bonding Primer 2', by brush, to the dry first coat, laying off at right angles to previous coat, again stippling to provide a physical key.
Apply 'Mix 1' as detailed under ‘Application 4 - Waterproof Renders’.
For areas subject to a high level of water pressure, i.e cellars, basements etc., or where walls / floors are in poor condition, BS 8102:1990 (The Code of Practice for Protection of Structures Against Water from the Ground) should be consulted.
Bonding Primer: Apply one coat of 'Bonding Primer 1'. If the surface is porous, 'Bonding Primer 2' should be used.
Finishing:
The above screeds should be applied whilst the bonding primer is still wet / green. For dense water resistant concrete, 'Mix 5' should be used.
Note: All mixes should be covered with polythene sheeting, damp hessian or mist sprayed for the first 48 hours.
All screeds should be laid in bays not exceeding 25m². The maximum length of the bay should be no greater than 1.5 x the width.
Best results are achieved if work is carried out at temperatures between 5°C and 25°C with the use of well graded, clean, dry sharp sands.
Bonding Primer: Brush apply 2 coats of 'Bonding Primer 3'. Allow approximately 30 minutes between coats.
Finishing: Whilst the second coat of Bonding Primer is still wet, apply gypsum bonding plaster as per normal plastering practice.
SBR Latex may also be used as a primer coat when diluted with 4 parts water to control suction on very porous and difficult surfaces before subsequent treatments are carried out with cement / gypsum based systems.
AFTER APPLICATION, LEAVE TO DRY THOROUGHLY BEFORE CONTINUING.
Bonding Primer 1: 1 part SBR Latex: 1 part water: 5 parts cement (by volume) mixed to produce a smooth, creamy consistency. 5 litres of SBR Latex Liquid would provide enough 'Bonding Primer 1' to cover approximately 30m² per coat.
Bonding Primer 2: 1 part SBR Latex: 2 parts cement (by volume) mixed to produce a thin, smooth cream. 5 litres of SBR Latex Liquid would provide enough 'Bonding Primer 2' to cover approximately 20m² per coat.
Bonding Primer 3: 1 part SBR Latex : 1 part water: 3½ parts gypsum plaster (by volume). Mix to a smooth consistency. 5 litres of SBR Latex Liquid will provide enough 'Bonding Primer 3' to cover approximately 25m² per coat.
Note: All Bonding Primers should be applied to a minimum thickness of 1mm.
Platinum Building Chemicals Ltd | Damp Proofing
Platinum Salt Neutraliser is an aqueous solution that has been specifically developed to overcome the problem of salts in a wide range of substrates from new plasterwork to old stone.
Due to rising dampness, salts contained in ground water are absorbed into the masonry and subsequently into the plaster coat. If the rising damp had been severe the plasterwork can lose key and visual evidence of this problem can often be noted by the presence of salt deposits.
In such severe circumstances the plasterwork must be removed and re-plastering carried out in accordance with an appropriate re-plastering specification which will prevent any residual salts in the base substrate migrating into new plasterwork.
There are, however many situations where the type of salts within the masonry are such that the plasterwork remains in good condition. In these cases the Salt Neutraliser can be used thus saving considerable time and expense by not having to re-plaster these areas.
There are many other occasions where even after re-plastering work, salt efflorescence can be seen on the new plasterwork. This often leads to concern that the damp proof course has failed, when in fact, in them, majority of cases the efflorescence is due to other factors such as drying out, salts in construction, plumbing or rainwater leaks, condensation or salty bricks. Under these circumstances Salt Neutraliser is an ideal product to treat the problem.
NOTE: FOR INTERNAL USE ONLY. THIS PRODUCT IS NOT RECOMMENDED FOR EXTERNAL SALTING PROBLEMS.
Available in 1 Litre, 5 Litre and 25 Litre Containers.
Neutralises the action of salts to prevent or reduce efflorescence.
Applicable to all internal mineral building surfaces.
Used as concentrate or in diluted form.
Brush away or remove all loose salts.
Thoroughly soak the affected area with clean tap water.
Apply Salt Neutraliser by brush or roller to areas showing salts contamination. Under most circumstances one coat or application will be adequate.a) Where heavy salting on old brickwork is being treated use Salt Neutraliser as the concentrate (container strength).b) On new plasterwork or light salting use Salt Neutraliser diluted with water up to 50/50 dilution rate.
Some frothing may occur which is due to the reaction with the salts. Allow some time for the neutralising action to be completed. A white deposit may be left on the surface where original efflorescing has taken place and is sometimes difficult to remove.
If re-decorating is to be applied on the treated surface the area should be washed with water and allowed to dry. Do not redecorate at any time until the treated areas are thoroughly dry.
Coverage will vary with the type of surface and substrate: 1 litre concentrate should treat 5m² to 10m².
Platinum Building Chemicals Ltd | Basement Tanking
Platinum Lime Inhibitor is specifically formulated for the control of primary and secondary efflorescence in concrete mixes.
Platinum Lime Inhibitor is applied to concrete surfaces prior to the installation of a 'Type C' Cavity Drain Membrane System to prevent the ‘leaching’ of free lime from the concrete.
Primarily designed to be used on new concrete structures, Platinum Lime Inhibitor should also be used to treat cut recesses in existing concrete slabs.
Concrete floors newer than 12 months. The whole of the concrete slab or raft as well as the recess formed ready for Drainage Conduits / Channels.
Walls - 200mm up the wall from the floor, or where a ‘kicker’ has been formed to a concrete wall, apply from the floor up to 200mm above the kicker.
Concrete floors older than 12 months - The recess cut into the concrete ready for Drainage Conduits / Channels as well as 200mm either side of floor construction or movement joints.
Underpinned properties require application to 200mm either side of the joints. Dry-packed areas should be sealed with a cement-based tanking product and then the tanking treated with Platinum Lime Inhibitor
Prevents limescale build up
Seals concrete
Solvent and caustic free
Easy to use and handle
Non-hazardous (on dilution)
Compatible with alkaline substrates
Long term durability
Complies with BS8102:2009
Clean the surface to be treated, removing any dirt, mould or loose coatings.
Mould release agents or floor paints should be completely removed.
The Lime Inhibitor can be applied to damp substrates but cannot be applied to wet substrates.
Remove all standing water prior to application.
Pour 8 Litres of clean water into a large empty bucket or mixing drum.
Empty contents of 1 Litre Lime Inhibitor into the mix, then fill the empty 1 Litre container with clean water to wash the container and empty into the mix to make a 10 litre ready to use solution.
Pour contents into a Spray Applicator.
Moving along the floor from one end to the next apply an even single coat using a coarse spray.
Avoid using a fine mist and avoid ponding of the liquid on the surface.
Coverage will mainly depend on the porosity of the surface. 10 litres will cover a maximum of 100m²
MicroSealer is a highly penetrative solution specially formulated to react with hydrated cement both at the surface and to a depth of up to 15mm.
The Silicate active ingredients form monolithic structures within the concrete which are long-lasting and durable and will improve surface wear characteristics.
Additionally, a silicone resin component cures to form water repellent properties in the concrete thereby improving even further the resistance to surface water absorption and / or lime efflorescence.
New concrete floors may be treated after a period of curing (approx. 14 days). However, power-floated floors are not suitable for treatment.
Please note that MicroSealer will not prevent excessive laitance from delaminating.
Surface preparation to remove excessively weak material by mechanical abrasion is essential.
It is also advised that surface weakness in floors with a deficiency in cement content may not be successfully treated by chemical hardening nor is MicroSealer suitable as a surface preparation prior to painting.
Water-based / odourless
Reduces dusting of old and new concrete
Inhibits lime efflorescence
Extends floor life
Reduces penetration of oil/water
Easy to use
Remove surface dirt, grease, oil and other contaminants.
Open pores by scraping the floor vigorously with a hard broom or wire brush, followed by soft brooming (or vacuum) to remove dust.
If the floor is wet washed at this stage, leave to dry before treatment.
Stir MicroSealer thoroughly and pour evenly over the floor surface – a plastic or galvanized metal watering can with a fine rose is suitable.
Covering capacity will depend on porosity but an average target is 4-6m²/litre per application. Sweep the dressing backwards and forwards to ensure even saturation and satisfy the absorption of the floor. AVOID FORMING PUDDLES.
Allow to stand for 24 hours between coats. The floor can be used during treatment. The number of coats required will depend on porosity of the floor.
Applications should continue at 24 hour intervals until the surface is no longer dusting after rubbing (2 -3 coats is normally sufficient). Do not use at temperatures below 5°C.
NB. It is very important to remove excess MicroSealer from the surface with a sponge or mop ten minutes after application in order to remove any unreacted material from the surface. 24 hours after the final application swill the floor down with clean water and brush well.
MICROSEALER IS NOT RECOMMENDED FOR USE WITH FLOOR PAINTS.
First Coat: 1 litre per 4m² - 6m²
Subsequent Coats: 1 litre per 6m² - 8m².
DampSeal DPM Paint is a highly advanced Styrene Butadiene Latex-based liquid-applied damp proof membrane.
DampSeal DPM Paint offers a simple method for many water proofing and vapour proofing applications.
The product supplied is a viscous liquid of similar consistency to thick emulsion paint.
Available in 5 Litre or 10 Litre Containers in either White or Black colours.
The colours will differ slightly on application from the colour of the dried membrane / paint. The damp proof membrane dries to a tough semi-gloss finish.
DampSeal DPM painthas been independently tested and found to be an effective guard against CO² and Radon Gas. The advantages include:
Single pack system
Water based compounds that can be applied even to damp backgrounds
Non-toxic, non-hazardous, solvent and plasticiser free
Good bond to many substrates
Low water vapour permeability
Quick drying. Typically dry in 1 hour
Toughness, high flexibility, extensibility and good crack bridging properties
Alkali resistant. Can be applied to alkaline surfaces
Resistant to silage acids
The background surface should be smooth or have a light even texture. Any masonry should be flush pointed and defects in existing surfaces made good.
The surface needs to be clean, sound and free from dust, loose material or free surface water. DampSeal DPM paint should not be applied in wet conditions or where these conditions are likely to occur before the membrane has dried.
DampSeal DPM paint should not be applied when the temperature of the background, or the air temperature, is below 7°c.
It sometimes advantageous to pre-wet concrete or masonry backgrounds, so that these are damp but free from any water glistening on the surface.
Because of the wide variety of background types and site conditions it is always advisable to check adhesion to the background by testing on a sample area before starting any job.
DampSeal DPM can be applied by brush or roller and is effective in the following situations.
FLOORS: Under screeds (or above screeds) to provide a damp proof membrane.
BASEMENTS: As part of a waterproofing system beneath ground level. NOT suitable where hydrostatic water pressure is present.
WALLS: Can be used under render or plaster as a water barrier or vapour barrier.
TILING: As a secondary protection under tiles in wet areas e.g. bathrooms, food processing areas, balconies, etc.
SILAGE STORAGE: The membrane protects concrete from silage attack.
GAS BARRIER: To minimise CO² / Radon transmission.
DampSeal DPM paint may be applied by brush, roller or airless spray. If necessary the compound can be diluted with up to 10% water, however care should be taken to ensure that the correct dry coat thickness is applied.
The thickness of the dried DPM per coat depends on the method of application.
For a single dry coat thickness of more than 0.30mm it is recommended that DampSeal DPM is applied by airless spray. If airless spray is used single dry coat thickness’s of up to 1.0mm can be obtained.
Note: A single coat of 0.60mm dry thickness or more will require a greater drying time than for an equivalent multi-coat application.
If two coats are being applied it is recommended that the coats be applied at right angles to each other.
Before applying the second coat it is necessary to let the first coat become touch dry. The time required to reach this tough dry condition will vary according to site conditions but will typically be in the order of 1 hour. It is preferable if the second coat is applied within 24 hours of applying the first coat.
After all coats have been applied DampSeal DPM paint should be left for at least 4 days before attempting any ponding tests. Under unfavourable drying conditions this period may need to be extended.
Whilst most applications to concrete roofs have been successful, blistering shortly after application of DampSeal DPM paint to the roof has occasionally occurred.
This blistering is caused by the heat from the sun causing a vapour pressure build up below the membrane.
The problem is exacerbated if the background concrete is wet.
The risk of blistering can be minimised by ensuring a very good bond to the background and avoiding application of DampSeal DPM in, or shortly prior to, strong sunlight.
Techniques for maximising bonding are:
Vigorously brushing the first coat into the background concrete using a stiff bristled broom.
Priming the roof with a slurry of SBR Bonding Agent and Ordinary Portland Cement. Allow this primer coat to harden for at least 2 days before applying DampSeal DPM.
In some situations e.g. at high stress points such as wall / floor junctions and construction joints it is advised to use Platinum Mesh Tape to provide strength and to reduce cracking.
The fabric is rolled onto the first wet coat and then coated with additional DampSeal DPM after allowing the first coat to dry to a tacky condition.
A minimum dried coating thickness of 0.6mm is necessary to provide a vapour barrier.
This should be applied in a minimum of two coats. (i.e. 0.3mm dry film thickness per coat for two application).
For the final dried membrane thickness to be 0.60mm a coverage rate of 1.20kg/m² is required (this is the total for all coats). This corresponds to approximately 1 Kg/m². A 5kg Bucket will cover Approximately 5m² based on 2 Coats
Cromar Building Products | Damp Proofing
Cromaprufe is a cold applied rubberised bitumen emulsion that dries to provide a tough, black flexible coating.
Cromaprufe will provide a waterproof membrane on concrete and brick foundations, retaining walls and bridge abutments. It also protects concrete structures against attack by sulphates present in soils.
Cromaprufe can be used as a waterproofer for floors and walls. It is also highly effective as an adhesive for bonding wood block and wood mosaics, expanded polystyrene and cork tiles, and provides a key for plaster on difficult surfaces.
Available in 5 Litre and 22.5 Litre Containers.
All surfaces should be sound, stable and free from dust, dirt, grease, oil and all loose matter.
Cromaprufe may be applied to damp but not waterlogged surfaces. Porous and hot dry surfaces should be dampened with clean cold water to assist the application of the product.
Stir well before use.
Apply by brush. Do not apply to external surfaces in wet weather or if rain is threatened. Allow good
ventilation in confined areas. In multi-coat applications, each coat should be allowed to dry completely before the next coat is applied.
Waterproofing and Protection of Structures, Foundations, Retaining Walls & Bridge Abutments:
Apply 2 coats, each at 2m² per litre. When treating foundations, the coating should be taken to meet the damp-proof course provided in the base or wall.
Cromaprufe may be applied to green concrete surfaces immediately after the shuttering has been removed to act as a curing membrane.
It is recommended that 48 hours be allowed to elapse before back-filling.
Cromaprufe may be used to provide a damp-proof membrane on concrete beams and columns before they are clad with rendering, masonry or brickwork. Two coats of Cromaprufe should be applied, each at 2m² per litre.
When the second coat has become tacky it should be blinded with 1 to 2 mm stone chippings or clean sharp sand.
If rising dampness is at all suspected, the best method of prevention is the insertion of a damp proof course or the repair of the existing one.
Remove all dirt, dust and grease. If the surface is uneven it should be levelled using cement mortar.
Bare brickwork should be covered with a thin skin of cement mortar, which should be allowed to dry.
Apply three coats of Cromaprufe each of 2m² per litre. The final coat should be blinded with clean sharp sand while it is still tacky.
Remove the wallpaper, loose distemper paints, dirt, dust and grease and make good any damaged or perished plaster. Lightly dampen the prepared surface and apply two coats of Cromaprufe each at 2m² per litre.
A section of the wall (about 300mm) should be left untreated so that any trapped moisture may evaporate away. When decorating over Cromaprufe do not use gloss paints or other oil based products.
Emulsion paints and wallpapers may be used after first hanging a lining paper, fixed with cellulose paste. Do not use wallpapers based on vinyl.
Not advised for interior walls below ground level. It is recommended to treat on the outside as Cromaprufe is unlikely to resist exposure to free water or water pressure, conditions which are often found in basements and cellars.
Sandwich construction - severe conditions and penetrating damp: Apply two coats of Cromaprufe onto the smooth, clean concrete subfloor, each at 1m² per litre.
Whilst the second coat is still tacky, blind with clean sand, as a protection against foot traffic and to provide a good key for the top screed.
It is important that the Cromaprufe membrane is taken up walls to marry with the DPC and that the dried film is not punctured or damaged.
Apply the top finishing screed to a thickness of at least 50mm and allow to dry out thoroughly before laying a floor covering.
Where severe dampness is unlikely to occur, a surface treatment with Cromaprufe will prove an efficient precautionary measure (however, the sandwich construction as described above should always be undertaken if conditions are severe and damp to penetrating).
Apply of priming coat at 7.5m² per litre by diluting 1 part Cromaprufe with 6 parts clean cold water and allow to dry thoroughly.
Two coats of Cromaprufe each at 1 m² per litre should then be applied. Each coat should be taken up to joint with the existing DPC and the dried film of Cromaprufe should not be punctured or damaged before the floor covering is laid.
Note: Rubber tiles, pure vinyl tiles, vinyl sheets, rubber foam backed carpet or any floor covering containing appreciable amounts of solvent or plasticizer should not be fixed with, or applied over Cromaprufe.
If damp conditions are expected, first treat the floor as described above in 'floors' section. Ensure that the surface is level and clean. Lightly prime but do not over wet the surface with clean cold water.
Pour some Cromaprufe into a shallow tin and dip each wood block separately into the adhesive, coating only the underneath and half-way up the sides. Press the blocks home firmly, taking care to exclude air.
When fixing wood mosaics panels, spread Cromaprufe onto the screed at 0.8m² per litre and immediately place the panels into position.
Note: On non-porous floors, allow the film of Cromaprufe to become tacky, (30 to 45 minutes before laying the panels). Where underfloor heating has been installed, this should be turned off and the floor allowed to cool prior to laying blocks or mosaics. Allow 48 hours before turning back on again.
Cromaprufe may be applied to surfaces which have poor keying properties e.g gloss painted walls, old tiles, to permit the application of plaster.
The surface, which should be free from grease and dirt, should be coated with two thin layers of Cromaprufe (4.5m² per litre each).
Whilst the second coat is still tacky it should be blinded with clean sharp sand and allowed to dry for 48 hours before plastering according to Plaster Manufacturers recommendations.
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