NON-LEVELING (for vertical surfaces). Dicor’s Non-Leveling Non-Sag Lap Sealant creates a secure, secondary seal along the roof’s edges and along termination rails. Compatible with EPDM, TPO and PVC membranes. It adheres firmly to aluminum, mortar, wood, vinyl, galvanized metal, fiberglass and concrete that has been properly preped. Ideally suited for aftermarket use, the lap sealant is one of the highest volume products sold in RV stores today. 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. Lap Sealant Cure Times Vary. IMPORTANT: 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.