Quote:
Originally Posted by JRTJH
Your idea of spraying a protective coating on the underside of the trailer will protect it from about 50% of the risk. The other 50% comes from above the floor (roof leaks, window leaks, side vent/molding leaks, plumbing leaks and "just plain bad luck leaks"... Your idea won't protect you from that half of the problem, but it would add significant weight, which in a boat might be considered "well spent ballast" but in an RV, is extra, unwanted weight that detracts from payload, adds to tire wear and increases demand on the tow vehicle.
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John, I have pondered spraying several cans of the rubberized undercoating over the problematic Darco areas under the wheel well portion, in the same spots where you installed your HDPE. (Mine are also showing some signs of small softening). The stuff you spray on vehicle frames, axles, and wheel wells to prevent rust. Waterproof, and wouldn't add much weight. My only concern would be how well it would hold up to the pebble dusting, but it is often used on car wheel wells which also get rock spray. Thoughts?