Expanding insulation in the belly

Question

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?

colo_native · Answer

I used pond foam it is water proof.https://www.homedepot.com/p/Beckett-12-oz-Waterfall-Foam-Sealant-FM12HD/100206907

agesilaus · Answer

LinkBut on the other hand normal polyurethane foam is water proof but maybe not resistant to direct impingement of flowing water like the waterfall foam. And a lot cheaper. However waterfalls in the RV belly are quite rare.

shum02 · Answer

Painting it usually seals it.  You just have to be careful with what you paint it with.

auwing2 · Answer

Thanks for the suggestions

Forum Discussion

Expanding insulation in the belly

About Fifth Wheel Group

Related Content

Replace insulation inside heater column.

Insulating the Belly of my TT

belly liner repair

Insulation

Thor's expanding.