Concrete sealer interior/exterior water based - acrylic"mason's select" clear satin 5 gallon Provides a clear protective coating to concrete and masonry surfaces. Durable, non-yellowing and will not crack or peel. Seals moisture out, inhibits mildew. Provides resistance to hot tire pick-up, UV rays, gasoline, oils and other chemicals. Depending o n porosity of surface, covers 150 to 250 sq. ft. per gallon on first coat and 250 to 350 sq. ft. per gallon on second coat.