Kinda an accident really. Went into the lumber store to pick up some spray foam to seal around the house, etc. Don't normally use the stuff except when nothing else will do(it yellows and is destroyed by the sun unless you paint it, and it doesn't like paint that much). Ok, so saw a new product that is 'landscaping foam'. Of course, it's more expensive, but does not succumb to the sun's rays. It is nasty stuff, just what I like. I mention this because I'm convinced it may have purpose elsewhere. Couldn't come up with an idea, but it's just one of the products that seems to have potential. Ummm, definitely wear gloves!