P-270 Perma-Seal is a two component, epoxy reaction resin based sealer for professional flooring installation on damp subfloors. ERP-270 will retard moisture pressure from a humid subfloor to an acceptable level for any flooring installation. It will bridge minor cracks in the sub floor. ERP-270 spreads easily and creates a dust free surface ready for safe installation of flooring. It increases the bonding of subsequently applied primers, leveling compounds and/or adhesives.