HENRY WATERFLEX is a one-component Waterproofing and Crack Isolation Membrane. An easy-to-use, single-component, loadbearing waterproofing compound. WaterFlex produces a flexible, positive side waterproof coating for all common interior building substrates requiring protection from topside water exposure. Ready to use out of the bucket. Premixed flexible, topside waterproofing for interior floors and walls. Very easy-to-apply with a paint roller or brush on. Use for bathrooms, showers and other wet areas prior to the installation of tile. Highly workable consistency; minimal drips and splatters. Crack isolation up to 1/8 in. (3 mm). Bonds to a wide range of substrates. Meets or exceeds ANSI A118.10, Meets or exceeds ANSI A118.12 and IAPMO. Coverage is 56.75 sq. ft. (5.27 sq. m) with 2 coats over drywall.Sold as 1 gal. (3.79 L) unit.