RampStar™ is an interior, quick-setting underlayment with excellent workability, making screeding, ramping, or patching fast and easy. It can be used over concrete, terrazzo, ceramic or quarry tile, epoxy coatings, non-water-soluble adhesive residue, and approved wood subfloors. Installation of common floor coverings using water-based adhesives can proceed as soon as RampStar is hard enough to work on without damaging the surface. Moisture-sensitive adhesives can be applied 16 hours after RampStar has been installed.