Thanks. Yes, I saw a can of red stuff (not sure if it was GreatStuff or not) yesterday in HVAC supply store and almost got some until I read that it could cause warpage of the surrounding material. Yikes!Originally posted by troyorr
RoBoTeq, DAPtex is the brand of latex foam I use. Comes in a blue can. A lot better than GreatStuff, in the red can. It is really good stuff. I buy it at Lowes but I'm sure other places also sell it. I like the fact that this stuff won't overexpand like the polyurethane foams. It only expands until it meets resistance. It won't buckle or warp objects it comes in contact with. One can can seal around all of the boots in a new home.
One last question -- Temperature at the returns is in a reasonably narrow range, but output from the supplies can vary from 50-ish or so (especially downstairs where the ductwork is in the crawlspace) during the cooling season to possibly 110-120F during stage 2 operation of the furnace in heating season. Will the foam hold up under those conditions?