General description Smartseal roof sealer creates a water-repellent barrier and protects against the re-growth of moss and algae. This high-quality, clear, solvent-free acrylic impregnating roof sealer is suitable for concrete, clay, or slate tile roofs. Once applied, it alters the chemical structure of the roof tiles, providing an excellent water-repellent surface while greatly restricting the growth of algae, lichen, and moss. Technical specifications Suitable for slate, clay tiles, and concrete tiles 1 x 25 litre will treat up to 125 m² on concrete roof tiles & 200-250 m² on clay & slate roof tiles Average coverage: 5 m² per litre Touch dry in 2-3 hours Fully waterproof in 24 hours Lifespan: up to 10 years Solvent-free impregnating sealer Installation Ensure tiles or slates are clean, dry, and free from moss or algae spores before application. Pressure washing and application of a suitable biocide is essential unless applied to a new roof. Apply roof sealer using a hand-held