Just about everything attached to the roof of an RV is a potential entry point for water. The TV antenna, vent fans, satellite dish, plumbing vents, solar panel mounts or anything else screwed into, or transitioning through the roof to the interior are places that invite leaks.
The main line of defense against water damage is vigilance — periodic inspection of the Dicor waterproof sealant. Dicor self-leveling lap sealant is ubiquitous in the RV industry, sealing roofs on everything from pop-up trailers to diesel pusher motorhomes and everything in between.
The best way to avoid ever developing a leak in your RV is to check the roof at least a couple of times a year, looking for any cracks in the Dicor. One of the surest signs that an owner is meticulous in caring for their RV is to look for the tell-tale signs of Dicor patching on the roof. Dicor develops small cracks over time, and the periodic application of fresh Dicor to cover those cracks leads to the patchwork look of a well-maintained roof.
Dicor is available at just about any camping supply store or RV dealer, and requires only a standard caulk gun to apply. Before applying new sealant, just clean the area to be patched with mineral spirits. We have a fiberglass roof but if you have a rubber (EPDM) roof, it’s OK to clean the Dicor with mineral spirits. Just go easy on the quantity, being sure not to soak the rubber.
Products Shown In This Video (available on Amazon):