154925 Ames Research Laboratories MSS5 5 Gallon, White, Water Base, Maximum Stretch, High Strength Elastomeric Roof Coating, 25% Rubber, 75% Acrylic, Impervious To Water When Applied In A Uniform Seamless Fashion With Adequate Mileage, Non-Toxic, Low Odor, VOC Free, Use For Waterproofing Roofs Walls, Used On Metal, Tar Gravel, Built Up, Rolled Roofing, Many Other Surfaces, Can Be Used On EDPM, Concrete Top Roofs If Super Primer Is Applied First, May Be Used As A Roof System With Super Elasto-Barrier Over Old Tar Flat Roofs, Tar Gravel, Built-Up, Rolled Roofing, EDPM, Concrete, Top, Coverage: 1 Gallon Per 100 SQFT Per Coat.