Everbuild defender water seal is a high performance transparent water repellent specially formulated to prevent water penetration on all mineral substrates such as brick stone concrete pebbledash and rendering based on the latest technology silicone resins defender waterseal does not contain solvents harmful to the user or the environment and is non flammable defender waterseal penetrates deeply into the treated surface to provide effective water repellence for many years is unaffected by ultra