P-Tuff® Classic is a non-gassing, solvent-free, single component, liquid applied, water catalyzed, polyurethane elastomeric waterproofing basecoat. The unique product allows the base membrane to be applied in one application up to 3" (7.6 cm) deep down to a feather edge and cures simultaneously throughout the coating in approximately 4 hours at 75°F (24° C) and 50% relative humidity. The basecoat may be used for very rough or highly textured surfaces and where sloping or pond filling is desired.