Durock's Quick-Dry cementitious self-leveling underlayment sets and dries quickly, allowing floor coverings to be applied within 15 hours after application. This lends itself to high production in commercial, institutional, and rehab construction. With compressive strengths up to 6000 psi, it provides a smooth surface over concrete slabs at thicknesses from 3 inches to featheredge. USG Corp. 800-487-4431. www.gypsumsolutions.com