I did not use multiple boxes of green glue. (And also Silenseal.) I bought these at least two years ago, and won't be able to use them for another two years at least. Will Green Glue (and Silenseal) last 5 years sealed in the container?
I ask because I also had a bunch of fire caulking and fire spray. I went to use some of that, and none of it worked.
I think that is part of what makes GG different from just plain caulking -- I know I've cut some holes into double drywall with GG fairly recently and the GG was still VERY sticky and it has been 4 years and counting. (viscoelasticity)
If left cool and sealed I wouldn't be surprised if it was fine in 5 years.
I know this isn't 100% in line with the OP's original question, but what about life expectancy once installed? It seems to be pretty universally agreed that the performance of double drywall with green glue far exceeds just the double drywall alone. However, what about 8 years down the road, 15 years or 20+ years? Will the green glue still be performing at or near the same level? Or, will the sound isolation benefits slowly diminish over time?
if you can get the bucket opened after the mess around the edge has set. If you can clean off the edge and lip of the top and bucket and get a good clean seal. I think you will still have usable GG after several months
I had tubes of Green Glue setting in the basement for 5-6 years while I took a very long break on my theater build. When I needed it for the stage and riser platform layers, I cut the top off one, screwed on the tip and it was just like new. No problems for me.
On a related note, I also had some boards that I was laying the caulking gun down on before the 5-6 year break and there was a few puddles of "cured" Green Glue on the board. This stuff was still sticky and spongy! Good stuff indeed!!
Good to know. I thought the situation could be different with the big can where the glue gets in contact with a lot of air. Tubes are sealed until use, so that does not surprise me as much, but 5-6 is respectable.
( Delivery time on tubes here are about a month, while the big can is a couple of days. Also the tubes don't fit our standard guns, so that has to be ordered too and if it breaks you're screwed until you can get another delivered. The gun feel awfully marked up as well at $80... )