For gutters and flashings. Designed to penetrate and saturate flat built-up and composition roofs. Provides a tough, durable, weather-resistant film. Contains non-mineral fibers. Can be used at lower temperatures. Not formulated for use on any surface other than horizontal FLAT. In hot weather, this product may flow from sloped surfaces. Not recommended for use on wood or asphalt shingles. Covers 100 sq. ft per 1.5 Gal Depending on texture and porosity of surface. Not for sale in California. Black.