Titebond Concrete Primer is used over Gyp-Crete and lightweight concrete to provide a bondable surface for the installation of hardwood floors. It also performs exceptionally well as an additive to cement based patching and leveling compounds used over uneven or damaged subfloors. It provides adhesion of these compounds to concrete, wood, tile and other sound floor coverings. When added to portland cement and a sand mixture, Titebond Concrete Primer enhances the bonding of new, wet stucco or concrete to old concrete, masonry, stucco and similar surfaces. It provides a highly water-resistant and resilient base.