The industry Leader. This self leveling sealant is designed for horizontal surfaces. 501LSW. Helps create a water tight seal along the roof's edges, around air vents, vent pipes, air conditioners and screw heads. Compatible with EPDM sheeting, it offers excellent adhesion to aluminum, mortar, wood, vinyl, galvanized metal and concrete. It improves the ability to continuously seal and remain flexible. UV stabilized to prevent deterioration and discoloration. Will not stain or discolor any material to which it is applied.10.3 oz per Tube.