Tab 320S LINE-X (underbelly of the Trailer)

Midnapore

Just wanting to know if anyone out in TAB land has ever removed the black underbelly liner and had  LINE-X sprayed on.
This all started when I discovered some water Leaking through the black liner on the outside of the 2 stabilizer jacks. Then I noticed that there's some water Trapped between the 2 stabilizer jacks.
 I am guessing that the trailer being a 2013 320S model, the tires have thrown up debris and caused perforations through the under belly liner, where its leaking.
 I still haven't figured out where the leak is, as it's dry inside the trailer, no sign of moisture anywhere. I am guessing its coming through where the wall, and roof meet, and running down inside the wall. Obviously this needs further investigation. 

bjn2

If your trailer has the same corrugated plastic on the belly as our 2023 model, the liner isn't meant to be 100% watertight. It's there to help keep the tanks, plumbing and wire runs clean and protected from road debris. The water you observed could have gotten in through gaps, or it could have come from the trailer's tanks and plumbing. On our trailer, there are steel strips with screws that hold the plastic panel in place. If yours is similar, apply some penetrating oil to the screws before trying to remove them. That can give you a view above the panel to better assess if you need to fix anything. I can't imaging that using a bedliner spray on the components above the corrugated plastic would be good for them or for future maintenance. If the corrugated plastic is loose or has holes you could patch or replace it.

Cherokee

The "plastic cardboard" allows a smooth bottom for air to flow under your T@B. Without it turbulence would cause additional drag. It tares easily and is hard to patch. It offers little protection for anything. We replaced ours with a custom metal cladding (.030 aluminum) fabricated by Pack West in Sacramento