DampSolve-40 High Strength Damp Proof Cream - 1 Litre Cartridge Kits

Health & Safety Recommendations

Read the product label and Safety Data Sheet before use and follow all local site safety rules. Wear suitable gloves, eye protection and workwear, and avoid prolonged skin contact. When drilling, use suitable dust extraction or respiratory protection as mortar and masonry dust can be harmful, and wear hearing protection where required. Ensure safe access along the full length of the wall and keep the work area clear of trip hazards, trailing cables and debris, particularly when working around skirtings, floor finishes and internal doorways.

DampSolve-40 is designed to be installed into masonry at low pressure using a cartridge gun. Do not inject into live electrical areas, unknown voids, or structurally unstable masonry. If the wall is heavily cracked, friable, bulging or otherwise unsound, rectify structural issues before treatment. Where the cause of dampness is uncertain, or where below ground lateral damp is suspected, seek competent professional advice before starting.

Substrate Suitability

DampSolve-40 High Strength Damp Proof Cream is intended for injection into masonry to control rising damp, typically via a mortar bed. It is suitable for most common masonry types, including solid brickwork, blockwork and many stone constructions, provided a practical drilling pattern can be formed to maintain continuity across the chosen course.

Cavity walls can be treated by drilling and injecting each leaf as required, subject to confirming the cavity is clear at the intended DPC level and that the drilling plan provides full coverage through the mortar bed. Random stone and rubble filled walls require particular care because the mortar line can be irregular and some stones may be porous. In walls thicker than 350mm, drilling from both sides at a corresponding height is typically required to achieve full thickness coverage.

Drilling Preparation

Start by confirming that rising damp is the issue being addressed and remove or reduce external moisture sources that can mimic or worsen symptoms. Check and repair rainwater goods, gutters, downpipes and drains, and ensure surface water is directed away from the building. Confirm that external ground levels are not bridging the proposed DPC line. As a general rule, the new DPC line should be at least 150mm above external ground level wherever practical.

Internally, remove skirtings, fixings and finishes that obstruct access to the selected mortar bed. Salt contaminated plaster should be removed from the treatment zone to at least 300mm above the highest visible damp mark, or higher where contamination is extensive. If internal floors are below external ground level, external ground reduction may be required where foundations allow, or the DPC may need to be positioned higher with internal tanking below the DPC to prevent lateral moisture and salt migration.

Check low level timbers for signs of fungal decay and address timber defects as part of the overall remediation. For cavity walls, ensure cavities are clear of debris at the intended DPC height. Where ground levels change, or where walls adjoin untreated structures, plan vertical DPC continuity to connect horizontal DPC lines and isolate untreated wall sections where required.

Drill 12mm diameter holes horizontally in the selected mortar bed with hole centres no greater than 120mm. The target hole depth is typically around 90% of the wall thickness, adjusted pro rata for intermediate thicknesses. As a practical guide for common wall thicknesses, drill to approximately 100mm for 115mm walls, 210mm for 230mm walls, 320mm for 345mm walls and 430mm for 460mm walls. Where masonry is irregular, ensure the drilling pattern targets the base of all perpends along the chosen course to maintain continuity. If drill holes become blocked, re drill immediately prior to injection or drill an additional hole nearby to ensure the correct volume of cream can be introduced.

Application Method

These instructions relate to DampSolve-40 supplied in 1L cartridges as part of the 1L Kit format, applied using the Cox Powerflow Cartridge Gun and the supplied brass DPC injection nozzle. Prepare the cartridge by piercing the foil cap at the top, then screw the brass nozzle on securely so a consistent, controlled bead can be delivered.

Load the cartridge into the Cox Powerflow Cartridge Gun in accordance with the gun manufacturer’s instructions, ensuring the cartridge is seated correctly and the drive mechanism engages smoothly. Insert the brass nozzle to the full depth of the drilled hole. Begin dispensing and steadily backfill as you withdraw the nozzle, aiming to fill the hole fully to within approximately 10mm of the face. This rear to front backfilling method helps minimise voids and supports even distribution within the mortar bed for continuous DPC formation.

Continue hole by hole along the selected mortar course, maintaining the same fill level and working methodically to avoid missing holes. Take particular care around corners, returns, chimney breasts, door openings and changes in wall thickness where continuity is most at risk. Wipe up any spills immediately and dispose of contaminated wipes appropriately. If cream contacts non target surfaces such as paving or brick faces, it will often dry clear, but prompt cleaning remains best practice to maintain a tidy finish.

Coverage

Coverage varies depending on wall thickness, drill spacing, hole depth and substrate type. Refer to the coverage table below for accurate planning and ordering, based on 12mm holes at up to 120mm centres and the standard depth guidance for common wall thicknesses.

Where masonry is unusually porous, irregular, or thicker than expected, allow additional material and consider whether drilling from both sides is required to achieve full thickness coverage.

Curing Time

DampSolve-40 forms its hydrophobic barrier as it migrates and cures within the masonry. Final cure typically takes 2 to 6 weeks, depending on wall thickness, substrate porosity, moisture load, temperature and ventilation. Walls may remain damp for a period after installation, particularly where hygroscopic salts are present or where the wall has been saturated for a long time.

For best results, allow injected walls to dry for as long as practical before replastering. A minimum waiting period of 14 days is commonly recommended before commencing salt management and replastering, but longer drying times are beneficial where programme allows. Stable background heat and good ventilation will support drying.

Finishing

Externally, drill holes can be finished by re pointing with a matching sand and cement mortar to blend with existing masonry, compacted neatly to a sound finish. Alternatively, Universal DPC Injection Plugs can be used to close the holes cleanly and consistently, selecting the closest colour to suit the wall finish.

Internally, holes can be left open if the replastering specification is designed to stop short of the DPC line, or they can be filled as part of making good prior to finishing, depending on the detailing required. Any finishing method should avoid bridging the DPC level and should maintain a clear, continuous line at the intended height.

Decoration

Decoration should only take place after the wall has had sufficient time to dry and after salt contaminated plaster has been addressed correctly. If hygroscopic salts remain in place, staining and finish failure can occur even when the chemical DPC is functioning. Where replastering is required, use a salt resistant system such as Wykamol Renovation Plaster or Wykamol Renderproof in line with a suitable specification.

Do not redecorate too early. Allow new plaster systems to cure and dry as instructed by the plaster manufacturer, and use breathable finishes where specified. Avoid impermeable wall coverings or coatings that can trap residual moisture unless the wall system has been designed for that purpose.

Cleaning

Clean spillages immediately. Wash contaminated surfaces promptly with warm soapy water. Keep the outside of the brass nozzle and gun contact areas clean during use to avoid build up.

Once cured, residues are difficult to remove and may require mechanical removal from tools or surfaces.

Limitations

DampSolve-40 is designed to control rising damp by forming a chemical DPC barrier, but it does not resolve other damp mechanisms such as penetrating damp, leaks, condensation, or lateral moisture ingress below ground level. Bridging of the DPC by external ground, internal screeds, render, debris in cavities, or plaster taken below DPC level can compromise performance and must be addressed.

Performance depends on correct DPC height, correct drilling pattern, correct hole depth and complete treatment continuity. In very thick walls, highly irregular masonry, or where access is only possible from one side, drilling strategy may need adjustment and in some cases drilling from both sides is necessary. If the wall construction is uncertain, establish whether the wall is solid, cavity, rubble filled or unusually thick before drilling so hole depths and strategy are correct.

Other Information

Plan the full treatment line before drilling, including corners, returns, party walls, changes in ground level and adjoining structures. Provide vertical DPC continuity where required to connect horizontal DPC lines and isolate untreated wall sections. Keep the DPC line at least 150mm above external ground level wherever feasible, and as close to internal floor level as practical where solid floors are present.

Rising damp control works best as part of a complete remedial package that includes moisture source control, correct DPC placement, salt management and appropriate replastering and decoration. Where damp diagnosis is uncertain, or where the building is historic, unusually constructed or below ground, a competent survey should be undertaken before specifying chemical injection treatment.

Q) What is DampSolve-40 Damp Proof Cream - 1 Litre Kits, and what problem is it designed to fix?

A) DampSolve-40 Damp Proof Cream - 1 Litre Kits are designed to control rising damp by installing a chemical damp proof course within a selected mortar bed. Rising damp occurs when ground moisture is drawn upwards through capillaries in mortar and masonry, typically leaving salts and causing low level staining, plaster breakdown and recurring decoration failure. The kit combines DampSolve-40 40% active injection cream with a Cox Powerflow Cartridge Gun, a rigid brass injection nozzle, and 12mm x 260mm SDS drill bits for the correct drilling and injection method. When installed correctly, it forms a hydrophobic barrier that reduces further moisture rise and supports gradual drying.

Q) How does DampSolve-40 work once it is injected into the wall?

A) DampSolve-40 is injected into a continuous line of 12mm holes drilled along a chosen mortar course. After injection, it migrates through the masonry pore structure and reverts towards a liquid phase, allowing it to spread and passivate across the mortar joint. As it cures, it reacts to form water repellent polysiloxanes in-situ, creating a hydrophobic zone within the treated course that reduces capillary movement of liquid water. This is what interrupts the rising damp pathway. For the system to work properly, the drilling line must be continuous through corners and junctions, and bridging must be eliminated so moisture cannot bypass the treated course.

Q) What is included in DampSolve-40 Damp Proof Cream - 1 Litre Kits?

A) DampSolve-40 Damp Proof Cream - 1 Litre Kits are supplied as a contractor ready installation set up. You get DampSolve-40 high strength 40% active injection cream in 1L cartridges, a Cox Powerflow Cartridge Gun for smooth, controlled extrusion, and a brass DPC injection nozzle that provides rigidity and depth placement for backfilling holes correctly. The kit also includes 12mm x 260mm SDS drill bits, with the quantity matched to the kit option, so drilling can be carried out consistently in common mortar beds and masonry types. The aim is to provide the correct dosing and drilling essentials without relying on high pressure pumping equipment.

Q) Why choose the 1L kit format rather than smaller cartridge kits?

A) The 1L kit format is generally chosen for productivity, consistency and repeat use. A 1L cartridge allows longer injection runs between reloads, which is useful when treating long ground floor perimeters, multiple rooms, or repeated remedial jobs. The Cox Powerflow Cartridge Gun provides smoother output and higher force than basic guns, which helps maintain steady dosing and reduces the temptation to rush or underfill holes. The rigid brass nozzle helps you reach full depth more reliably and supports proper rear to front backfilling. For small, one off patches a smaller kit may be adequate, but the 1L kits are better suited to professional pace and repeatable workmanship.

Q) Which types of walls can DampSolve-40 Damp Proof Cream - 1 Litre Kits be used on?

A) DampSolve-40 Damp Proof Cream - 1 Litre Kits are intended for most common UK masonry where a workable drilling line can be formed. This includes solid brickwork, blockwork, and many cavity wall situations, provided each leaf is treated correctly and bridging is addressed. It can also suit many stone walls, but irregular mortar beds, mixed materials, and variable porosity mean drilling layout and continuity checks become more important. Walls should be structurally sound and stable, because severe cracking, bulging, or loose masonry can make drilling and dosing unreliable. For walls thicker than 350mm, drilling from both sides at matching heights is commonly required to achieve proper distribution across the full thickness.

Q) How do I know the damp problem is rising damp before using DampSolve-40?

A) Rising damp is only one cause of damp symptoms, so it is important to confirm diagnosis before installing a chemical DPC. Rising damp is typically concentrated at low level, can show tide marks, and is often linked to salts that cause powdering, staining and plaster failure. However, leaking gutters and downpipes, defective pointing, cracked render, plumbing leaks, bridged cavities, or high external ground can create similar symptoms. Condensation can also cause damp patches and mould, often in colder rooms or areas with poor ventilation. A sensible check includes external moisture sources, drainage, internal humidity, and whether external ground or internal finishes are bridging the intended DPC level. If the diagnosis is uncertain, a competent survey is worth it.

Q) Where should the chemical DPC line be installed with DampSolve-40 1 Litre Kits?

A) The new chemical DPC line should be positioned so it blocks capillary moisture but is not easily bridged. As a general rule, aim for at least 150mm above external ground level wherever practical. Internally, it is often placed close to floor level, but only where that does not create bridging through screeds, plaster or internal floor build ups. If internal floor level is below external ground, you may need to reduce external ground locally where foundations allow, or place the DPC higher and use appropriate internal measures below it to manage lateral moisture and salt risks. Whatever height you choose, keep the line level and continuous through corners, returns, and junctions so the barrier is unbroken.

Q) What drilling pattern should be used for DampSolve-40 Damp Proof Cream - 1 Litre Kits?

A) A standard drilling pattern is 12mm diameter holes drilled horizontally into the selected mortar bed at centres not exceeding 120mm. The drilling line should be consistent and level, because continuity across the course is essential for a reliable chemical damp proof barrier. Drill in the mortar bed wherever possible rather than into brick, as the mortar joint is the target pathway. In irregular masonry, you may need to adjust slightly while still maintaining an unbroken treated line, often by ensuring the base of perpends along the course is included. After drilling, clear dust and confirm holes are open to full depth, because blocked holes lead to under dosing and gaps in the finished barrier.

Q) What hole depth is recommended for common wall thicknesses?

A) Hole depth is usually around 90% of wall thickness, which helps treat the course effectively without breaking through. As a practical guide, drill to about 100mm for 115mm walls, 210mm for 230mm walls, 320mm for 345mm walls, and 430mm for 460mm walls. Adjust proportionally for intermediate thicknesses. If the wall is thicker than about 350mm, drilling from both sides at corresponding heights is commonly recommended to avoid leaving an untreated core. If you encounter friable mortar, collapsed dust, or repeated blockage, re drill immediately before injection or add a nearby hole at the same level to maintain the correct dosing pattern.

Q) How do I use the Cox Powerflow gun and brass nozzle properly?

A) Prepare the cartridge by piercing the foil cap at the top, then screw the brass injection nozzle on securely so it seals and delivers a consistent output. Load the cartridge into the Cox Powerflow Cartridge Gun in line with the gun instructions, ensuring the drive rod engages properly and the cartridge sits squarely. Before starting on the wall, test dispense onto waste material to confirm a steady flow. During injection, keep the nozzle clean because mortar dust can build up at the tip and affect flow. The brass nozzle is designed to provide rigidity and depth placement, so it should be inserted to full hole depth each time rather than just feeding cream into the front of the hole.

Q) What is the correct injection method for DampSolve-40 1 Litre Kits?

A) The correct method is to insert the brass nozzle to the back of the drilled hole, then inject while steadily withdrawing the nozzle so the hole is backfilled from the rear outwards. Aim to fill each hole to within about 10mm of the surface. This approach helps minimise voids and supports consistent distribution into the mortar bed and surrounding pore structure. Work methodically along the full treatment line, maintaining the same fill level and ensuring no holes are missed, especially around corners, returns, chimney breasts and door reveals where continuity is often lost. If a hole will not accept the correct volume, it is usually blocked, so clear, re drill and re inject to avoid gaps.

Q) How do I maintain continuity at corners, party walls, and changes in wall thickness?

A) Continuity is critical because a chemical DPC only works if it forms an unbroken barrier along the chosen course. Plan the route before drilling so the treated line carries through corners, returns, chimney breasts, party wall junctions and internal partitions. Drill right up to corners and continue around the return so the barrier connects rather than stopping short. At changes in wall thickness, adjust drilling depth appropriately while keeping the same mortar course height. Where ground levels change or where an adjoining wall is not being treated, provide vertical DPC continuity so moisture cannot bypass the treated line. After injection, re check the full run and correct missed or blocked holes immediately.

Q) Can DampSolve-40 Damp Proof Cream - 1 Litre Kits be used on cavity walls?

A) Yes, but cavity walls must be approached with care. The safest method is usually to treat each leaf as its own wall, drilling and injecting the selected mortar course within each leaf thickness so the barrier is formed where needed. The cavity must be clear at the intended DPC level, because debris and mortar droppings can bridge across and continue damp symptoms even after injection. Junctions around openings and corners are common failure points, so continuity detailing matters. If there is any doubt about cavity condition, it is better to investigate and remove bridging first, because injection cream cannot overcome a physical moisture bridge running through cavity debris.

Q) How suitable are DampSolve-40 1 Litre Kits for older properties and thicker walls?

A) DampSolve-40 1 Litre Kits are well suited to older properties, but wall construction should be understood before drilling. Many older buildings have irregular mortar beds, mixed materials, voids, or variable thicknesses, which can affect drilling accuracy and dosing. For very thick walls, particularly above 350mm, drilling from both sides at matching heights is commonly required to achieve full thickness coverage and avoid leaving an untreated core. Friable mortar can cause holes to collapse or block, so clearing and re drilling is often necessary. In rubble filled or highly irregular walls, drilling positions may need adjustment to maintain continuity. Where construction is uncertain, a survey led approach reduces the risk of gaps in the treated barrier.

Q) How much coverage should I expect from DampSolve-40 Damp Proof Cream - 1 Litre Kits?

A) Coverage depends on wall thickness, hole depth, hole spacing, and the porosity of the masonry, so it is best estimated by linear metres of wall rather than room size. Using 12mm holes at up to 120mm centres and drilling to around 90% of wall thickness, thicker walls use more cream per metre because each hole is deeper. Irregular masonry can also increase consumption if additional holes are needed to maintain continuity, or if holes repeatedly block and require re drilling and re dosing. For accurate planning, measure the full treatment length, confirm wall thicknesses, and apply the coverage guidance for the kit option. Always allow extra for corners, returns and junction details.

Q) How long does DampSolve-40 take to cure, and when will walls start to dry?

A) DampSolve-40 cures as it migrates and reacts within the masonry, with final cure typically taking two to six weeks depending on wall thickness, porosity, moisture content, temperature and ventilation. Drying of the wall above the treated course can take longer, because the chemical DPC reduces further moisture rise but does not instantly remove water already in the wall. Improvements are usually gradual and are strongly influenced by background heat and steady ventilation. Hygroscopic salts can also keep surfaces looking damp by attracting moisture from the air, even while the masonry is improving, which is why salt management is often essential for a clean final appearance.

Q) Why is salt resistant replastering often needed after using DampSolve-40?

A) Rising damp usually leaves hygroscopic salts in plaster and masonry. Even after DampSolve-40 has reduced further capillary moisture movement, those salts can continue to attract moisture from the air, causing staining, powdering, blistering paint and repeated decorative failure. This is why a chemical DPC is usually only one part of a proper specification. Where salts are present, contaminated plaster is normally removed to a suitable height and replaced with a salt resistant system such as Wykamol Renovation Plaster or Wykamol Renderproof. This helps prevent salt driven staining and creates a stable base for decoration. Skipping salt management is one of the most common reasons people think a DPC has not worked.

Q) When can I redecorate after using DampSolve-40 Damp Proof Cream - 1 Litre Kits?

A) Redecoration should be driven by drying and salt management, not just the injection date. Even if the chemical barrier cures within weeks, the wall may still be drying, especially if it was saturated for a long period or is thick masonry with limited ventilation. If replastering is needed, allow the wall to stand for at least 14 days before commencing salt management and replastering, then follow the plaster system guidance on curing and drying before decorating. Decorating too early can trap residual moisture and lead to staining or paint failure. Where breathable finishes are specified, they can support drying, while impermeable coverings can slow drying unless the wall build up is designed to handle vapour correctly.

Q) How should drill holes be made good after treatment?

A) After injection, wipe away any excess cream promptly. Externally, drill holes can be finished by re pointing with a suitable sand and cement mortar that matches the existing appearance, compacted to a sound, weather resistant finish. Alternatively, Universal DPC Injection Plugs can be used to close the holes neatly and consistently, selecting a colour that suits the masonry where possible. Internally, holes can be plugged and made good, or left open if the replastering detail is designed to stop short of the DPC line. The key is to avoid bridging the treated course with plaster, screed, render or other finishes that could bypass the new chemical DPC.

Q) What are the best practical tips for reliable results with DampSolve-40 1 Litre Kits?

A) Success is mainly about preparation and methodical work. Confirm the damp mechanism and fix external defects such as leaking rainwater goods or cracked render. Remove bridging, especially high external ground and internal finishes that run below the intended DPC. Mark the DPC line clearly and plan continuity around corners and junctions before drilling. Drill clean 12mm holes at consistent centres, clear dust, and ensure holes are open to full depth. Inject by backfilling from the rear outwards and keep fill levels consistent. Pay extra attention around reveals, chimney breasts and changes in wall thickness. Finally, manage salts properly with a salt resistant replastering system where needed, because salts can keep finishes looking damp even after the wall is improving.

Q) What are the key limitations of DampSolve-40 Damp Proof Cream - 1 Litre Kits?

A) DampSolve-40 is designed to control rising damp, not every damp problem. It will not cure penetrating damp from external defects, plumbing leaks, condensation issues, or lateral moisture ingress below ground level, which often requires separate measures such as tanking or membrane systems. Performance can also be undermined by bridging, including external ground levels, internal screeds, render, debris in cavities, or plaster taken below the DPC line. The system relies on correct drilling centres, correct hole depth, full dosing and complete continuity. In very thick walls, highly irregular masonry, or one sided access situations, drilling strategy may need adjustment and drilling from both sides at the same height can be necessary to achieve effective coverage.

Q) What safety precautions should be followed when using DampSolve-40 1 Litre Kits?

A) Follow the product label and Safety Data Sheet and treat drilling as the main risk on most jobs. Wear suitable gloves, eye protection and workwear, and avoid prolonged skin contact. Masonry drilling creates fine dust, so use dust control, wear suitable respiratory protection when needed, and use hearing protection with SDS tools. Keep the work area clear of trip hazards and maintain safe access along the wall run, especially around skirtings and doorways where cables and debris build up. Check for hidden services before drilling, including electrical cables and pipework. Do not inject into unknown voids, live electrical zones, or structurally unstable walls. If the wall is badly cracked, friable or moving, resolve structural issues first, and get competent advice if diagnosis is uncertain.

Technical Data Sheet

Safety Data Sheet