Lap sealant helps create a watertight seal along a roof's edges, around air vents, vent pipes, air conditioners and screw heads. Compatible with EPDM and TPO sheeting. The lap sealant is UV stabilized. Can be applied to EDPM, TPO and PVC roofing without the use of a primer. Excellent adhesion, superior durability, UV resistant. No more guessing which sealant to use.