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Lured by the hope of “no mess, easy clean up”, I tried a can of DAP foam on some scraps of material as a test (drywall, wood, metal framing connector).
Even when cured (24 hrs), it has the consistency of shaving cream. It easily breaks off the test scraps, leaving a gummy white residue. It seems that a good draft through any crack that you’d be trying to seal, would cause the latex foam to break its adhesion.
By comparison, the low expansion polyurethane foam stuck tenaciously to all the materials (plus it cures much faster).
So is there any application where the latex foam could actually substitute for poly?? It doesn’t seem so.
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...and I worry that it will be tasty to bugs or mold or something (the container says, "not for use at or near grade").
I tried some anyway (warm water and soap clean up too handy to pass up).
Really interested to see how it fares, but does seem too good to be true.