Using foam in a can to fill gaps

If you care about the appearance, landscape foam is a dark gray and it works like the ugly yellow stuff.

Thanks for the quick replies. I'll be spraying s-l-o-w-l-y.

Buy the non expandable type.

There are a couple of kinds; the non-expanding type that just fills the gaps and the expanding foam that goes everywhere. To just fill the gaps I would think the non-expanding foam would be more controllable.

I have used it in several rigs to plug gaps and voids. It pays to go easy as it does expand considerably. They have a new low expansion product out now. I prefer the original as I can cut back over burden.

I too use spray in foam around the small opening all around my trailer. My POPUP trailer does not have the under belly material so I can lay under my trailer at night with the interior lights ON and can really see where most of the small holes are at located...

Great stuff for that...

In my other 5th wheel trailer I am forever running RG and Video cables in and out of the built-in Air Conditioner ducts in the ceiling. This is my major route to get from the back to the front of the trailer as both ends opens up into a ceiling mounted cabinet. Everytime I punch a hole thru the foam duct there I use the spray foam to build up the around the new hole I have made to seal it off so the air conditioner can build build up some air pressure when being used...

Roy Ken

Just know that a little goes a long way. It really does expand!

We used it quite a bit to keep mice out. Works well. No issues that we can think of except when needing to replace a line that runs through the spray foam. It takes a little longer.