Wykamol HydraDry Tanking Slurry

Health & Safety Recommendations

Before using Wykamol HydraDry Tanking Slurry, always read the packaging label and Safety Data Sheet and follow all stated precautions. Normal site hygiene should be observed throughout preparation, mixing and application. Wear suitable gloves, eye protection and protective clothing, as the product is cement-based and can cause irritation through skin or eye contact. A suitable dust mask or respiratory protection should also be worn during powder handling and mixing, particularly when working indoors or in areas with limited ventilation.

The working area should be kept well ventilated, but the newly applied slurry must also be protected from rapid drying caused by strong airflow, direct sunlight or drying winds. Where basements, cellars or below ground areas are being treated, lighting, access and ventilation should all be planned carefully before work begins. Any active water leaks must be stopped before tanking work can continue, using Platinum Aqua Stop - Fast Set Plugging Mortar. HydraDry Tanking Slurry is designed to resist water pressure once fully cured, but it must never be applied over running water or active leaks.

Substrate Suitability

Wykamol HydraDry Tanking Slurry is suitable for concrete and masonry substrates, including concrete structures, renders, brickwork and blockwork, provided they are structurally sound, clean and correctly prepared. It is suitable for internal and external use, above and below ground, and can be used as part of basement waterproofing, cellar tanking, foundation waterproofing, concrete waterproofing, damp-proofing and water-retaining structure specifications.

The strength of concrete substrates should be at least 25N/mm². Weak, friable, contaminated or unstable surfaces must be removed or repaired before application begins. Exposed steel must be protected with two coats of a suitable corrosion inhibitor before the waterproofing system is applied. Where the structure includes construction joints, angled joints, movement joints, expansion joints or connection joints, the detailing should be designed separately and the relevant Wykamol Proflex Tape data sheets should be followed carefully. These areas are critical points in any tanking system and should never be treated as simple flat surface applications.

Surface Preparation

All surfaces must be thoroughly prepared before HydraDry Tanking Slurry is applied. Loose pointing, existing render, plaster, timber, dust, grease, oil, organic growth, surface laitance and any other foreign material that could reduce adhesion must be removed by suitable means. On uneven surfaces, the background should be made sound and level before tanking begins. Wykamol Universal Mortar should be applied in accordance with its data sheet where levelling or repair is required, including any specified priming requirements.

On level concrete or masonry surfaces, remove all loose material, dust, oil, grease, corrosion and organic growth. Wet grit blasting or water blasting is preferred where practical, as this helps expose a clean, open surface that is well suited to bonding. Smooth or dense surfaces should be prepared to allow the slurry to key properly. The quality of surface preparation has a direct effect on waterproofing performance, particularly where the system must resist negative water pressure from behind the coating.

Wall-to-floor joints, internal corners and changes of angle require special attention. Sharp angles should always be avoided in the tanking membrane, as they can create weak points in the finished system. Joints should be thoroughly raked out, cleaned and formed with Wykamol Universal Mortar as a fillet seal before slurry application. This helps create a smoother transition and supports continuity of the waterproof barrier.

Priming

Before applying HydraDry Tanking Slurry, prime the prepared substrate using Platinum SBR Bonding Agent mixed 1:1 by volume with clean water. Apply the primer by brush, roller or spray and allow it to become tacky to the touch before proceeding. This will normally take around 30 minutes to 2 hours, depending on temperature, ventilation and substrate absorbency.

If the substrate dries out too rapidly between coats, the priming process should be repeated. Maintaining the correct surface condition is important because the slurry must bond properly to the background and cure at a controlled rate. Overly dry or highly absorbent substrates can draw moisture from the slurry too quickly, which will affect workability, bond strength and final performance.

Mixing

Only clean water should be used when mixing Wykamol HydraDry Tanking Slurry. Use a clean mixing vessel and a mechanical mixer fitted with a suitable paddle. Pour the minimum required water quantity into the mixing vessel first, then gradually add the powder while mixing under low shear to reduce dust generation. Once all the powder has been added, increase the mixing action and continue until a uniform, lump-free slurry is achieved.

Typical mixing time is around 1 to 3 minutes. If required, gradually add additional water within the stated limits until the desired application consistency is reached. Do not exceed the maximum water addition, as over-watering will reduce the effectiveness of the product as a waterproof barrier. Excessive mechanical mixing should also be avoided, and total mechanical mixing time must not exceed 5 minutes.

For each 20kg bag of HydraDry Tanking Slurry:

• Brush Application requires approximately 3.2 to 4 litres of clean water.
  
  

• Trowel Application requires approximately 3.2 to 3.6 litres of clean water.
  
  

• Spray Application requires approximately 3.5 to 4.2 litres of clean water.

The pot life at 20°C is greater than 30 minutes, so only ever mix quantities that can be applied within the usable working time.

Application Method - By Brush

HydraDry Tanking Slurry must be applied in a minimum of two coats. Each coat should be applied at a uniform thickness of at least 1 to 1.5mm, giving a final cured thickness of approximately 2 to 3mm. For use as a radon barrier, the coating thickness must be increased, with each coat applied at 2.5 to 3mm to achieve a minimum final cured thickness of 5 to 6mm.

For brush application, use a stiff-bristled brush or broom on vertical surfaces and a stiff-bristled brush or rubber squeegee on horizontal surfaces. The first coat must be worked firmly into the substrate to ensure good contact and bond. This is especially important on textured masonry, repaired areas, fillet seals and surfaces exposed to negative water pressure. Apply the slurry evenly and avoid missed areas, pinholes or thin sections.

Allow the first coat to harden for approximately 2 to 5 hours. The second coat should be applied as soon as the first coat has hardened, but before it has fully set. Apply the second coat at a 90° angle to the first coat to help improve coverage and reduce the risk of weak or missed areas. The minimum overall thickness should be 2mm for standard waterproofing applications.

Application Method - By Trowel

For trowel application, mix the slurry to the correct trowel-grade consistency using the stated water addition range. Apply the first coat evenly across the prepared substrate, pressing the slurry firmly into the surface to achieve a strong bond. The trowel should be used to maintain a consistent layer thickness and to work the product into minor surface texture, without leaving voids or drag marks.

The first coat should be allowed to harden for around 2 to 5 hours before the second coat is applied. As with brush application, the second coat should be applied once the first coat has hardened but has not fully set. Maintain the required overall thickness and ensure corners, fillets, floor-wall junctions and repaired areas are all fully covered. Trowel application is particularly useful where a more controlled coating thickness is required, or where the surface needs a smoother tanking layer before subsequent finishing work.

Application Method - By Spray

For spray application, use traditional wet mortar spraying equipment and processes suitable for cementitious slurry products. Mix the material within the spray application water range and ensure the slurry is consistent, lump-free and suitable for the spray equipment being used. The application should produce an even, continuous coating over the prepared substrate.

Spray application must still achieve the required final thickness. For standard waterproofing, the finished system should be at least 2mm overall. For radon barrier applications, the minimum final cured thickness should be 5 to 6mm. Spray-applied coatings should be checked carefully during application to confirm uniform coverage, especially around corners, junctions, construction details and irregular surfaces.

Technical Drawings

Typical RC wall and slab waterproofing detail using Wykamol HydraDry Tanking Slurry, with Swellmax Waterbar and Wykamol Universal Mortar angle fillet for reinforced joint protection.

Wykamol HydraDry tanking coat applied over Wykamol Universal Mortar, showing the levelling coat and floor-to-wall fillet used to create a continuous waterproof barrier.
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Coverage

A 20kg bag of Wykamol HydraDry Tanking Slurry covers up to approximately 7m², depending on substrate texture, porosity, application method and the required coating thickness. Rough, uneven or highly absorbent backgrounds will reduce practical coverage, while smoother prepared substrates may allow coverage closer to the stated figure.

Where the product is being applied as a radon barrier at increased thickness, coverage will be lower than standard waterproofing coverage. Additional material should always be allowed for fillet detailing, construction joints, surface irregularities, wastage, overlapping work sections and any areas requiring localised build-up.

Curing & Ventilation

Correct curing is absolutely essential for the performance of HydraDry Tanking Slurry. The surface must be protected from strong sunlight, drying winds and rapid moisture loss for a minimum of 48 hours after application. Suitable protection may include a curing compound, polythene sheeting, damp hessian or a similar method. The aim is to allow controlled curing rather than rapid surface drying.

If the slurry is left unprotected, the surface should be fine mist sprayed 3 to 4 times daily for at least 48 hours. Do not use a heavy water spray that could wash out or damage the coating. Ventilation should be managed carefully in basements and enclosed areas. Air movement is important for safe working and for drying the wider structure, but direct drying airflow over newly applied slurry should be avoided during the early cure period.

The product should not be applied at temperatures below 5°C or when temperatures are falling. It should also not be applied if temperatures are expected to fall below 5°C within 24 hours. The substrate temperature must be at least 5°C before application starts. Application in direct sunlight should always be avoided, as rapid drying can seriously affect curing and waterproofing performance.

Overcoating & Finishing

HydraDry Tanking Slurry is suitable for overcoating once it has correctly and thoroughly cured. Where plastering is required, Wykamol Renovation Plaster should be used, ideally around 48 hours after the final coat of HydraDry has been applied. Before applying Renovation Plaster, repeat the priming process using Platinum SBR Bonding Agent mixed 1:1 with water, as described in the surface preparation section above.

Gypsum plaster must not be used in direct contact with HydraDry Tanking Slurry. This is important because gypsum-based finishes are not suitable directly over this type of tanking system and may fail in damp or salt-affected environments. If HydraDry Tanking Slurry has been applied as a DPC, breathable paint must be used on top of any finish. If redecoration is planned 12 months after DPC installation, non-breathable finishes may be considered only if the moisture content of the plaster and background complies with the chosen finish manufacturer’s recommendations.

Where HydraDry Tanking Slurry is applied to environments that will contain aquatic life, such as ponds, it must be finished with Wykamol Technoseal DPM, following the relevant data sheet. The tanking slurry must also not be punctured by wall fixings, dry lining systems or later installation work, as any punctures can seriously compromise the waterproof barrier.

Cleaning

Tools and equipment should be cleaned with clean water immediately after use, before the slurry begins to harden. Brushes, rollers, trowels, spray equipment and mixing paddles should all be washed thoroughly as work progresses and at the end of the application period. Do not allow material to cure on tools or inside spray equipment.

Once hardened, HydraDry Tanking Slurry can only be removed mechanically. This may require scraping, chipping or abrasion, which can be time-consuming and may damage surrounding surfaces. Good cleaning practice during application is therefore important, particularly where work is being carried out around finished edges, door frames, service penetrations or adjacent surfaces not intended to receive the coating.

Limitations

HydraDry Tanking Slurry must never be applied over active water leaks. All active leaks must first be stopped using Platinum Aqua Stop - Fast Set Plugging Mortar. The product must not be applied to weak, contaminated, dusty, greasy or unstable substrates, as poor preparation can result in loss of adhesion and significantly reduced waterproofing performance. Do not exceed the maximum water addition during mixing, as this can render the product ineffective as a waterproof barrier.

The system should not be applied below 5°C, onto substrates below 5°C, or in situations where temperatures are expected to fall below 5°C within 24 hours. Avoid direct sunlight, drying winds and rapid drying at all times. If the slurry dries too quickly between coats, repeat the priming process before continuing. Gypsum plaster must not be used in direct contact with HydraDry Tanking Slurry. The cured tanking layer must not be punctured by fixings, battens, dry lining systems or other penetrations, unless the waterproofing detail has been specifically designed to accommodate them.

Construction joints, movement joints, expansion joints and connection joints all require separate detailing using the appropriate Wykamol Proflex Tape specification. Do not assume that slurry alone will safely bridge or waterproof moving joints. For structures containing aquatic life, HydraDry Tanking Slurry must be overcoated with Wykamol Technoseal DPM in accordance with the relevant data sheet.

Other Information

Wykamol HydraDry Tanking Slurry provides strong technical performance when correctly specified and applied. The product has a pot life at 20°C of more than 30 minutes, a flexural strength at 28 days of approximately 7N/mm², a compressive strength at 28 days of approximately 30N/mm² and adhesion to Universal Mortar of at least 0.8N/mm². It has a hardened density of approximately 1,850kg/m³ and a water pressure resistance of at least 7 bar, supporting use in demanding waterproofing and tanking specifications.

The product also achieves Reaction to Fire classification Euroclass A1, meaning it is classified as non-combustible under the relevant reaction to fire framework. Used correctly, HydraDry Tanking Slurry is suitable for permanent waterproofing of concrete and masonry, basement tanking, cellar waterproofing, damp-proofing, radon barrier applications and waterproofing work both above and below ground. Ultimately, the success of the system depends on correct diagnosis, thorough preparation, careful detailing, accurate mixing, sufficient application thickness and proper curing throughout.

Q) What is Wykamol HydraDry Tanking Slurry and what is it designed for?

A) Wykamol HydraDry Tanking Slurry is a cementitious waterproofing system designed to create a permanent waterproof coating on concrete and masonry. When mixed with clean water and applied correctly, it forms a monolithic bond with the substrate and protects against both positive and negative hydrostatic water pressure. Well suited to internal and external use, above and below ground, it is widely used for basement waterproofing, cellar tanking, foundations, concrete, render, brickwork, blockwork, water tanks, pools and planters. It is suitable for Grade 3 waterproofing in accordance with BS8102:2022, is WRAS approved for potable water contact, acts as an effective radon barrier, and is supported by BBA Certificate No. 02/3961.

Q) What surfaces is Wykamol HydraDry Tanking Slurry suitable for?

A) Wykamol HydraDry Tanking Slurry is suitable for a wide range of concrete and masonry substrates, including concrete structures, renders, brickwork and blockwork, provided they are structurally sound, clean and correctly prepared. The compressive strength of concrete substrates should be at least 25N/mm². It is suitable for internal and external use, above ground and below ground, and can be used in basement waterproofing, cellar tanking, foundation waterproofing, damp-proofing and water-retaining structure specifications. Weak, friable, contaminated or unstable surfaces must be removed or repaired before application. Exposed steel must be protected with two coats of a suitable corrosion inhibitor before the waterproofing system is applied.

Q) Where can Wykamol HydraDry Tanking Slurry be used in construction and remedial work?

A) Wykamol HydraDry Tanking Slurry is designed for a wide range of waterproofing and damp-proofing applications. Typical uses include internal basement tanking, cellar waterproofing, foundation waterproofing and concrete waterproofing for walls, slabs and retaining structures. It is also well suited to brickwork and blockwork waterproofing, swimming pools and water-retaining structures, WRAS-approved water tank lining, planters and external masonry features requiring water resistance, radon barrier applications and internal and external damp-proofing. The product is suitable for both new build and remedial projects, providing genuine versatility for professional waterproofing contractors, builders, restoration specialists and maintenance professionals working on a wide range of above and below ground waterproofing challenges.

Q) When should Wykamol HydraDry Tanking Slurry be used instead of a cavity drain membrane system?

A) Wykamol HydraDry Tanking Slurry is a cementitious tanking system that bonds directly to the substrate, making it particularly well suited to situations where the structure is sound enough for a bonded coating approach and where a seamless, monolithic waterproof layer is preferred. It is a strong choice for basement waterproofing, cellar tanking and below ground masonry where the background is adequately prepared and structurally stable. Unlike cavity drain membrane systems, which manage water rather than exclude it, HydraDry Tanking Slurry actively resists water pressure directly. However, the correct waterproofing approach should always be chosen following proper structural assessment, as the suitability of any system depends on substrate condition, water pressure, and project-specific design requirements.

Q) What are the main advantages of Wykamol HydraDry Tanking Slurry?

A) Wykamol HydraDry Tanking Slurry offers a strong combination of performance advantages. It forms a permanent cementitious waterproof coating that bonds monolithically with concrete and masonry, resisting both positive and negative hydrostatic water pressure. It can be used internally and externally, above and below ground, providing genuine versatility. It resists salt contamination in masonry, is WRAS approved for potable water contact, and has passed radon resistance testing. It is suitable for Grade 3 waterproofing under BS8102:2022 and carries BBA Certificate No. 02/3961. It can be applied by brush, roller or spray, and achieves a water pressure resistance of at least 7 bar, a compressive strength of approximately 30N/mm² at 28 days, and a Euroclass A1 non-combustible fire classification.

Q) What technical performance data does Wykamol HydraDry Tanking Slurry achieve?

A) Wykamol HydraDry Tanking Slurry achieves a strong technical performance profile suited to demanding waterproofing applications. At 28 days it achieves a compressive strength of approximately 30N/mm², a flexural strength of approximately 7N/mm² and adhesion to Universal Mortar of at least 0.8N/mm². It has a hardened density of approximately 1,850kg/m³ and resists water pressure of at least 7 bar, supporting use in high-pressure waterproofing situations. The pot life at 20°C is greater than 30 minutes, providing a practical working window during application. It achieves Reaction to Fire classification Euroclass A1, confirming non-combustibility. These figures reflect a product designed for permanent waterproofing of concrete and masonry in both above and below ground applications.

Q) How should surfaces be prepared before applying Wykamol HydraDry Tanking Slurry?

A) Thorough surface preparation is essential before applying Wykamol HydraDry Tanking Slurry. All loose pointing, existing render, plaster, timber, dust, grease, oil, organic growth, surface laitance and any other material that could reduce adhesion must be removed by suitable means. Wet grit blasting or water blasting is preferred where practical. Smooth or dense surfaces should be prepared to allow the slurry to key properly. Weak or uneven areas should be repaired using Wykamol Universal Mortar before tanking begins. Wall-to-floor joints, internal corners and changes of angle must be raked out, cleaned and formed with a fillet seal using Universal Mortar, as sharp angles create weak points in the finished waterproof barrier.

Q) What priming is required before applying Wykamol HydraDry Tanking Slurry?

A) Before applying Wykamol HydraDry Tanking Slurry, the prepared substrate must be primed using Platinum SBR Bonding Agent mixed 1:1 by volume with clean water. The primer should be applied by brush, roller or spray and allowed to become tacky to the touch before the slurry is applied, which normally takes around 30 minutes to 2 hours depending on temperature, ventilation and substrate absorbency. If the substrate dries out too rapidly between primer application and slurry application, the priming process should be repeated. Maintaining the correct surface condition is important because the slurry must bond properly to the background and cure at a controlled rate. Overly dry or highly absorbent substrates can draw moisture from the slurry and affect performance.

Q) How is Wykamol HydraDry Tanking Slurry mixed correctly?

A) Wykamol HydraDry Tanking Slurry should only be mixed with clean water using a clean mixing vessel and a mechanical mixer fitted with a suitable paddle. Pour the minimum required water quantity into the vessel first, then gradually add the powder while mixing under low shear. Once all the powder has been added, increase mixing and continue until a uniform, lump-free slurry is achieved. Typical mixing time is around 1 to 3 minutes. For a 20kg bag, brush application requires approximately 3.2 to 4 litres of clean water, trowel application requires 3.2 to 3.6 litres, and spray application requires 3.5 to 4.2 litres. Do not exceed the maximum water addition, as over-watering significantly reduces waterproofing performance. Total mechanical mixing time must not exceed 5 minutes.

Q) How is Wykamol HydraDry Tanking Slurry applied by brush?

A) When applying Wykamol HydraDry Tanking Slurry by brush, the product must be applied in a minimum of two coats. Each coat should be applied at a uniform thickness of at least 1 to 1.5mm, achieving a final cured thickness of approximately 2 to 3mm. Use a stiff-bristled brush or broom on vertical surfaces and a stiff-bristled brush or rubber squeegee on horizontal surfaces. Work the first coat firmly into the substrate to ensure good contact and bond. Allow the first coat to harden for approximately 2 to 5 hours before applying the second coat. Apply the second coat at 90 degrees to the first to help improve coverage and reduce the risk of weak or missed areas, particularly around corners and junctions.

Q) How is Wykamol HydraDry Tanking Slurry applied by trowel or spray?

A) For trowel application, mix Wykamol HydraDry Tanking Slurry to trowel-grade consistency using the stated water range. Apply the first coat evenly, pressing firmly into the surface to achieve a strong bond and consistent layer thickness. Allow to harden for around 2 to 5 hours before the second coat. Apply the second coat once the first has hardened but not fully set. Trowel application is particularly useful where controlled thickness or a smoother finish is required before subsequent work. For spray application, use traditional wet mortar spraying equipment suitable for cementitious slurry products. Mix within the spray water range and ensure coverage is even and continuous. All spray-applied coats must still achieve the required final thickness, with radon barrier applications requiring a minimum cured thickness of 5 to 6mm.

Q) How thick does Wykamol HydraDry Tanking Slurry need to be applied?

A) For standard waterproofing applications, Wykamol HydraDry Tanking Slurry must achieve a minimum final cured thickness of 2mm overall, applied in at least two coats of 1 to 1.5mm each. Where the product is being used as a radon barrier, the required thickness increases significantly, with each coat applied at 2.5 to 3mm to achieve a minimum final cured thickness of 5 to 6mm. These minimum thicknesses are critical to waterproofing performance, and reduced thickness can compromise the integrity of the barrier. Careful attention should be paid to corners, fillet details, junctions and construction details, where maintaining the correct and consistent coating thickness is especially important for the overall performance of the system.

Q) What coverage can be expected from a 20kg bag of Wykamol HydraDry Tanking Slurry?

A) A 20kg bag of Wykamol HydraDry Tanking Slurry covers up to approximately 7m², depending on substrate texture, porosity, application method and required coating thickness. Rough, uneven or highly absorbent backgrounds will reduce practical coverage, while smoother, well-prepared substrates may allow coverage closer to the stated figure. Where the product is being applied as a radon barrier at increased coat thickness, coverage will be considerably lower than the standard waterproofing figure. Additional material should always be allowed for fillet detailing, construction joints, surface irregularities, wastage and overlapping work sections. Planning material quantities accurately before starting work helps avoid running short during application, which could compromise continuity and quality of the finished tanking system.

Q) How should Wykamol HydraDry Tanking Slurry be cured after application?

A) Correct curing is essential for the performance of Wykamol HydraDry Tanking Slurry. The applied surface must be protected from strong sunlight, drying winds and rapid moisture loss for a minimum of 48 hours after application. Suitable protection includes a curing compound, polythene sheeting, damp hessian or a similar method. If the slurry is left unprotected, it should be fine mist sprayed 3 to 4 times daily for at least 48 hours, avoiding heavy spray that could wash or damage the coating. The product should not be applied at temperatures below 5°C, onto substrates below 5°C, or where temperatures are expected to fall below 5°C within 24 hours. Application in direct sunlight should always be avoided.

Q) What can Wykamol HydraDry Tanking Slurry be overcoated with after curing?

A) Once Wykamol HydraDry Tanking Slurry has correctly and thoroughly cured, it is suitable for overcoating with appropriate finishing systems. Where plastering is required, Wykamol Renovation Plaster should be used, ideally applied around 48 hours after the final coat, with the surface reprimed using Platinum SBR Bonding Agent mixed 1:1 with water beforehand. Gypsum plaster must not be used in direct contact with the tanking slurry, as it is unsuitable over this type of system in damp or salt-affected environments. Where the tanking slurry has been applied as a DPC, breathable paint must be used on top of any finish. For ponds or structures containing aquatic life, the cured slurry must be finished with Wykamol Technoseal DPM in accordance with the relevant data sheet.

Q) What certifications and standards does Wykamol HydraDry Tanking Slurry hold?

A) Wykamol HydraDry Tanking Slurry holds several recognised certifications and standards relevant to professional waterproofing specification. It is supported by BBA Certificate No. 02/3961, providing independent assessment of product performance and suitability within defined conditions of use. It is WRAS approved for contact with potable water, confirming suitability for appropriate water tank lining applications. It has passed the relevant tests for resistance to radon gas, supporting its use where radon protection is required. It is also suitable for use as part of a Grade 3 waterproofing system in accordance with BS8102:2022, subject to correct design, detailing, preparation and installation, supporting its specification on higher-value habitable basement and below ground projects.

Q) What are the limitations of Wykamol HydraDry Tanking Slurry?

A) Wykamol HydraDry Tanking Slurry has several important limitations to be aware of. It must never be applied over active water leaks, which must first be stopped using Platinum Aqua Stop Fast Set Plugging Mortar. It must not be applied to weak, contaminated, dusty or unstable substrates, as poor preparation will cause adhesion failure. Do not exceed the maximum water addition during mixing. Application below 5°C or in direct sunlight must be avoided. Gypsum plaster must not be applied in direct contact with the cured coating. The tanking layer must not be punctured by fixings, battens or dry lining systems. Construction joints, movement joints and expansion joints require separate detailing using Wykamol Proflex Tape, as slurry alone cannot safely bridge moving joints.

Q) Are there any practical tips for getting the best results with Wykamol HydraDry Tanking Slurry?

A) For the best results with Wykamol HydraDry Tanking Slurry, invest time in thorough surface preparation before mixing a single batch. Form fillet seals at all wall-to-floor junctions and internal corners using Wykamol Universal Mortar before slurry application begins. Prime correctly using Platinum SBR Bonding Agent mixed 1:1 with water, and apply the slurry to the tacky primer rather than a dried surface. Only mix quantities that can be applied within the 30-minute pot life. Apply the second coat at 90 degrees to the first and maintain the required minimum thickness throughout. Protect the applied coating from rapid drying for at least 48 hours. Never apply over active leaks, and always stop running water before starting work.

Q) What health and safety precautions should be followed when using Wykamol HydraDry Tanking Slurry?

A) Before using Wykamol HydraDry Tanking Slurry, read the packaging label and Safety Data Sheet and follow all stated precautions. The product is cement-based and can cause irritation through skin or eye contact, so suitable gloves, eye protection and protective clothing must be worn throughout preparation, mixing and application. A suitable dust mask or respiratory protection should also be worn during powder handling and mixing, particularly indoors or in areas with limited ventilation. The working area should be kept well ventilated, but newly applied slurry must be protected from rapid drying caused by strong airflow. In basements and below ground areas, lighting, access and ventilation should all be planned carefully before work begins.

Q) What should be done if there are active leaks before using Wykamol HydraDry Tanking Slurry?

A) Active water leaks must be stopped before Wykamol HydraDry Tanking Slurry can be applied. The product is designed to resist water pressure once fully cured, but it must never be applied over running water or active ingress points, as it will not be possible to achieve the required bond or cure in those conditions. Platinum Aqua Stop Fast Set Plugging Mortar should be used to stop active leaks before any tanking work begins. Once leaks have been successfully stopped, the plugged areas should be allowed to stabilise and the overall substrate should be correctly prepared, primed and dried to the appropriate surface condition before the tanking slurry application process starts.

Technical Data Sheet

Wykamol Tanking Slurry User Guide

Safety Data Sheet

BBA Certificate