Self-Leveling (for horizontal surfaces) The third part of Dicor’s three-part roofing system, EPDM Lap Sealant creates a secure, secondary seal along the roof’s edges, air vents, vent pipes and screw heads. Compatible with EPDM and TPO sheeting, it adheres firmly to aluminum, mortar, wood, vinyl, galvanized metal, fiberglass and concrete. Ideally suited for aftermarket use, the lap sealant is one of the highest volume products sold in RV stores today. </p> Directions for Use: Clean surface of all dirt, loose paint, rust, oil and grease. Allow surface to dry before applying sealant. Use standard caulking equipment to apply sealant. In cold weather, warm container at room temperature before use. Approximate Lap Sealant Cure Times: (approximate times for 50-70° F weather)5 Minutes – Skins over 4 Hours – Waterproof 48 Hours – Cure 80% 30 Days – 100% Cure</p> ***Manufacturers production date is located on the bottom of the tube. This is not an expiration date, it is production date. This product can last indefinitely as long as it is stored in a dry location and not extreme temps. Ideal temp storage between 55 to 85 degrees.