850 Roof Shield 100% Acrylic Clear Coating Designed to keep your roof looking clean and new by protecting it from harmful UV rays that can cause color fading and sealing it to minimize water absorption. This 100% Acrylic formula will decrease dirt pick-up and therefore the development of fungus, mold and mildew. Just one coat will retard efflorescence, enhance the substrates natural appearance and provide excellent gloss retention. Environmentally Safe. For Interior & Exterior Use.. Five Gallon pail. Clear. Richards Paint 100% Acrylic Formula Protects Against UV Rays Minimizes Diry Pick-Up Retards Efflorescence Fungus Resistant Mold & Mildew Resistant Moisture Resistant Environmentally Safe