A fast-curing, calcium aluminate based, patching and finishingcompound that provides a smooth finish to a variety of substrates prior to the installation of floor coverings. Formulated with Controlled CureTechnology,™ Silk helps eliminate installation problems of bond failure,crumbling, mildew and staining of resilient flooring due to free moisture found in traditional underlayments. Its rapid setting formula allows installation of most floor coverings in as little as 30 minutes.