What a great idea!So why would yellow expanding foam in a can not work. It's just a more recent
development since the 2 part foam instructions were written. I've used in under
the cockpit to keep the hull from oil-canning. As for soaking up water the
original foam used by the manufacture has the water resistance of a sponge.
Yes....it is black...it's a type of polyurethane expanding foam.they attach items underwater sometimes inside a aquarium with this stuff......the yellow foam absorbs water so can't be usedIs the stuff black? If so I just used some to repair a hole in a shed roof. The stuff is crazy-sticky. It would probably be good for the foam blocks. Just wear gloves and a shirt you don’t care about. Once that stuff gets on you you can’t get it off!!
Please help me with this....do I put the foam along the sides where the blocks meet the hull of do I try to get it along the base of the foam block,the underneath side???thanksWe've been discussing alternatives to 2-part foam here since 2010.
Since we do have successful applications using 2-part foam, yours would be an experiment. Before proceeding, ensure that the block is firmly jammed against hull and deck. (I wish a good outcome, and good luck).
As our member, the late Wayne, stated eight years ago, "pond foam" doesn't need to be a lightweight foam, nor does it matter if it gets soaked-through —when used in a pond:
Fixing foam block | Page 2 | SailingForums.com
I've got some $5 Gorilla glue, but it's clear, so it looks like Karo syrup.I would use the Gorilla brand polyurethane glue that looks like pancake syrup. It sticks well to plastics and fiberglass, foams slightly when curing to fill gaps and is slightly flexible after curing. the foamed parts have a thin water proof skin when dry, as long as you don't cut into it.