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Dicor 551LSD-1 is a non-leveling lap sealant for RV roofs. It stays put on vertical surfaces and edges instead of flowing out, so it works along termination rails and roof edges where a self-leveling sealant would run. It bonds to EPDM, TPO and PVC membranes and to aluminum, galvanized metal, fiberglass, wood, vinyl, mortar and concrete. It is UV stabilized and formulated without HAPS, and it is the standard aftermarket choice for resealing RV roof seams.
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RV owners treat this as the go-to lap sealant for edges and vertical seams, valuing that it stays where it is applied. Complaints center on application mess and the lack of a warranty.
This HAPS-free, non-leveling lap sealant creates a secure, secondary seal along the roof's edges and along termination rails. It is made for aftermarket use. The HAPS-free formula meets industry requirements and provides a cleaner, safer work environment.
The sealant works with EPDM, TPO and PVC membranes. It adheres firmly to aluminum, mortar, wood, vinyl, galvanized metal, fiberglass and concrete.
The sealant is UV stabilized to prevent deterioration and discoloration. It does not stain or discolor the roofing material it is applied to. It seals continuously and stays flexible.
