Smartseal Roof Tile Sealer is a clear, professional-grade, solvent-free, acrylic impregnating sealer for concrete, clay tile or slate roofs. Once applied, the chemical structure of the tile sealer is altered in order to produce an excellent water repellent surface. The growth of moss, algae and lichens is largely restricted to the surface of the tile after application of the sealer. Use a handheld sprayer or brush for application purposes, apply to saturation, we recommend that after once 20-30 minutes have passed, a light second 'wet on wet' coat is added. If rain is forecasted or temperatures are below 10°C, do NOT attempt to apply the sealer. The sealer is touch dry in 2-3 hours and attains maximum water resistance within 24 hours, protecting against water damage and preventing the appearance of organic green growth like moss and algae. This roof tile sealer comes in a 5L pack. It provides 10-year waterproof protection and won't change the appearance of the roof tiles. With a two-coat application, it creates a waterproof seal that can withstand the test of time. Coverage for concrete roof tiles is up to 125 m² with 25 litres, and for clay and slate roof tiles, it is 200-250 m². The sealant is resistant to water, stains, and organic growth, creating a waterproof barrier that effectively prevents water penetration and protects against water damage. It can be applied easily with a sprayer or brush.