Raincheck LS


Raincheck LS

  • Treats Limestone
  • Allows walls to breathe
  • Alkali resistant & UV resistant
  • 10 year service life
  • Rapid curing
  • Penetrates 2 – 10 mm
Raincheck LS 5L & 25L - Toner Dampproofing Supplies Ltd
Raincheck LS £46.99£219.97

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Raincheck LS

Raincheck LS is a colourless water repellent for limestone based on UV resistant silane-siloxane resins. The composition of Raincheck LS allows the water repellent material to bond to the carbonates in limestone.

Raincheck LS can be used on old and new buildings to protect against penetrating damp. Raincheck LS has excellent water repellent properties but still allows the wall to breath because it leaves pores unblocked so water can still evaporate out of the wall without letting any water in.

The product is suitable for the treatment of absorbent limestone rather than very dense types.

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25L, 5L

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Raincheck LS should be applied to dry, porous surfaces and not to sealed or painted substrates. It is intended for use above damp-proofing course level only.

Application to fragile stone or structures containing high levels of salt should be avoided.

Only apply Raincheck LS when rain is not forecast for the next 24 hours. Raincheck LS should not be applied to wet surfaces, or where it has rained in the last 24 hours.

For the treatment to be successful it is essential to check all joint and roof connections prior to application.

Although hairline cracks up to 0.3 mm can be ‘bridged’ by Raincheck LS, it may be necessary to fill wider cracks in brick/stonework and repoint using a suitable cement or lime based mortar incorporating Stormdry Repointing Additive No.1. After any repointing work, it is advisable to wait an appropriate amount of time to allow the mortar to cure before applying Raincheck LS. For cement mortars this is typically 7 – 14 days, whereas for natural lime mortars this may be several weeks to months.

Stormdry XR-Mortar can be used to seal cracks in masonry and patch repair small areas of damaged pointing, wait at least 24 hours before the application of Raincheck LS.

If required, Stormdry CB-Coat can be used as a top coat when multiple fine cracking is seen on the wall surface.

Remove all paint from the surface to be treated prior to application. Dirty surfaces should be cleaned before the application of Raincheck LS to the recommendations given in BS8221-1:2000, “Code of practice for cleaning and surface repair of buildings. Cleaning of natural stones, brick, terracotta and concrete.”

Remove any loose mortar, dust etc., using a masonry brush. When biological growth such as moss, algae or lichen needs to be removed, apply SoluGuard Multi-Surface Biocide in accordance with instructions.

Wooden and metal window/door frames, glass surfaces and plants should be covered up before treatment, since removal of silicone resin splashes after drying can be very difficult. Splashes should be removed as soon as possible using soapy water or, if necessary, a solvent. Due to the fast curing rate

of Raincheck LS, splashes will be difficult to remove, even after just a few hours. After this time a silicone remover may be required.

Test Area

Raincheck LS is suitable for limestone that is absorbent – it cannot readily penetrate very dense stone. It is recommended to try spraying some water on the stone surface to check for absorbency. Slight darkening may occur when it is applied

to some substrates, which will usually fade over time, but a small test area should be conducted prior to application to determine compatibility with the intended substrate.


Raincheck LS is supplied ready for use. Two coats should be applied by brush, roller or spray. It is important that the coating is uniform and that sufficient Raincheck LS is applied, since the success of the treatment depends on this. The second coat should be applied while the first coat is still wet.

If treatment is halted for any reason it is advisable to make a light chalk mark to indicate where treatment has ceased.

After application, tools should be cleaned with white spirit.


Raincheck LS can be applied using a standard low pressure sprayer. Application should start at the highest point working from side to side allowing ‘run down’ of the fluid for 15 – 30 cm. Two coats should be applied wet on wet.

Ensure suitable PPE is worn, consult the Material Safety Datasheet before use.

Other Information

Raincheck LS is produced in accordance with ISO 9001 and ISO 14001 quality and environmental management systems.

Datasheet & Downloads

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