Great Stuff and 6 mil poly vapour barrier

maljeff · 09-29-2010, 02:03 PM

Does anyone know if Great Stuff can come in permanent contact with a 6 mil poly vapour barrier and not eat away at it or damage it? I called Dow and they said "it shouldn't" but I typically don't like/trust "it shouldn't" as an answer.

jklingel · 09-30-2010, 02:19 AM

I've gotten GS on poly several times, as spill-over, and it did not do anything but dry. Some of that sat around for years before I got back to it and cut the poly off; the GS was just sitting there. So, I guess my answer is "It shouldn't".

littlecleo · 09-30-2010, 09:27 AM

Quote:

Originally Posted by jklingel

I've gotten GS on poly several times, as spill-over, and it did not do anything but dry. Some of that sat around for years before I got back to it and cut the poly off; the GS was just sitting there. So, I guess my answer is "It shouldn't".

I've had the same results

maljeff · 09-30-2010, 11:59 AM

Thanks for the info, much appreciated.

I have one more question I'm hoping you can help me with. I have some polystyrene insulation glued to my interior basement walls. I noticed that a few of the panels have a few small holes in them - not sure what from as I'm not the original owner. Can I fill those holes with GS?

thanks

jklingel · 09-30-2010, 01:26 PM

do a test zap somewhere to see if you have any dissolving issues. if not, fill 'em in. j