Re-Sealing the underbelly

[Stingray75]

I need to fill a couple openings in the frame and underbelly that were created when a new leveling system was installed n our Jayco last fall. The grey stuff Jayco uses looks like open cell but anything I’ve seen at the big box store causes concern that it would become a sponge after a while. Any suggestions?

[Grumpy]

Stone & Pond Foam, it's black.

[Stingray75]

Thanks Grumpy.

[RogerR]

If the hole(s) are very big you could check with any local RV store and ask if they sell the stiff plastic used for RVs.

If not, Amazon has plastic cardboard in black or white that would make a good patch material. Constructed with plastic and like cardboard.