: Hi Robert, my epoxy supplier (Raka) has it. Check out
: http://www.raka.com/epoxyacc.htm - Expanding Foam. I haven't tried it
: yet.

I've used hardware store insulation expanding foam in my composite boat, but would hesitate to use it in a wooden boat. It works in taking up space, and it generally excludes water in its own volume. But you're never going to get a complete fill, you will keep some water in the boat up against the hull on an extended basis, and that just doesn't seem like a great idea. Additionally, you'll grow some really neat life forms that have never before been seen!

Wouldn't do it.

Jack Martin