Protective coatings are a type of damp proofing sealant that safeguards brick and stone from the outdoor elements like rain, snow, and wind. The most common form of protective coating is a sealant. Sealants are materials that fill in gaps or cracks on the surface of the brick or stone to keep it water-resistant. Some examples of materials used to make sealants include silicone, acrylic, polyurethane, and epoxy.
Because many residential construction materials include salts, it’s critical that the protective covering on masonry substrates be chemical resistant. Delamination, blistering, cracking, peeling, and colour fading are all typical sealant faults.
Applying a waterproof coating is the most common way to protect masonry or stone from rising damp and water damage. This works by creating an impenetrable barrier over the substrate that won’t allow moisture to seep in and saturate the masonry.
Polyurethane and polyisocyanurate are the most popular waterproofing materials. They are made up of two layers: a bonding layer, which establishes a mechanical bond between the new surface and the old one; and a top-sealant layer, which is covered with to provide an effective seal against penetrations in the surface.