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 Type: Solvent-free acrylic impregnating sealer Coverage: 1 x 25 litre treats up to 125 m² on concrete tiles & 200-250 m² on clay & slate tiles Average coverage: 5 m² per litre Touch dry: 2-3 hours Fully waterproof: 24 hours Lifespan: Up to 10 years Installation Preparation: Ensure tiles or slates are clean, dry, and free from moss or algae spores. Pressure washing and application of a suitable biocide is essential unless applied to a new roof. Application: Use a hand-held sprayer or brush, applying to saturation. After 20-30 minutes,