Tenon Feather Patch Pro is a fast-setting, polymer-modified, self-drying, cement-based patch and skim coating compound for interior use under ceramic tile, hardwood flooring, carpet and a wide array of floor coverings. Ideal for deeper patching, this product can be applied from feather-edge to 2 in. 51 mm thick. Formulated for exceptional bond strength and superior workability, can be applied to concrete with a relative humidity RH up to 90%. Rapid-setting, with initial set in 15 minutes; can accept ceramic tile and stone applications, as well as moisture-sensitive floor coverings, in as little as 30 minutes or when completely dry.