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.