Dicor 501LSW is a self-leveling lap sealant for RV roofs, made from EPDM rubber. It flows out on horizontal surfaces to seal roof edges, vent pipes, air conditioners and screw heads, and it bonds to EPDM, TPO, fiberglass, aluminum, steel, wood and masonry. It can be painted once a skin forms. RV owners use it for resealing and touch-ups because it stays flexible and waterproof; the trade-off is that it only works on flat surfaces and cures slowly in cold weather.
In stockSold by RV Pro ShopReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
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Lowest price we've seen: $10.50 on Nov 9 at Amazon. Tracked across 1 store since Nov 9.
Owners rate it highly for sealing RV roofs, with most praise for how it flows out and holds a watertight seal. Complaints center on cold-weather curing and its limits on vertical surfaces.
This versatile and reliable Dicor 501 LSW self-leveling lap sealant is designed to create a watertight seal along roof edges, around air vents, vent pipes, air conditioners and screw heads. Formulated with a flexible and waterproof EPDM rubber compound, it is compatible with a variety of materials, including EPDM rubber, TPO, fiberglass, wood, aluminum, steel and masonry. The sealant can be painted over once the outer skin has formed, providing a seamless and durable finish. Available in a convenient 10.3-ounce size, this pack of 12 pieces offers an effective solution for your sealing needs on horizontal surfaces.
