Henry 687 Enviro-White Extreme 100% Acrylic Elastomeric Roof Coating is a premium, high solids white reflective roof coating. It features Dirt Pick-Up Resistance (DPR) technology, which prevents dirt and dust buildup, keeping the roof whiter and more reflective longer. When cured, it forms a permeable membrane, which prevents liquid infiltration, but allows moisture vapor to vent or breathe out of underlying substrate.