Originally Posted by dward51
The foam is a UV resistant expanding foam. You can get it on Amazon. Search for Great Stuff Multi-purpose foam. Pretty much the can is a one shot thing as once you start to use it, the foam will set up in the dispenser part. So if you have anything else that needs foaming, line it all up to be done at once. They also use it as a glue to help adhere the coroplast to the frame at the sides.
The Lippert repair guy told me a lot of people use some pressure treated wood as a backer to a cut section/splice in the coroplast. It's better than tape. I would use some stainless #12 or #14 screws with a large washer to hold the coroplast on either side of the cut with a 3" section of 1" pressure treated wood (I would cut and rip a PT 5/4 deckboard). Weight is next to nothing and you could still tape over that with something like Gorilla Duct Tape as a backup seal against insects or heat escaping in cooler weather (usually if you have coroplast underbelly, you have a heat duct into the belly).
Great stuff is great stuff! I used it to seal up some of the gaping holes they left and kept the mice out last winter. I also discovered that when I had water pouring through a concrete wall, if I stuck my gun into the hole and squeezed the trigger, I got an instant plug. Get the great stuff pro gun and you can use it whenever you want. Donít need to use up the whole can at once.
I want to modify my plumbing as well so will be doing some surgery too. Iím just not sure yet how big and exactly where I need to go as far as the cut goes. On my camper the pump doesnít draw water from the bottom of the tank so I can never get that last 15 to 20 gallons of water out. Iím going to splice into the drain line.