||06-21-2019 03:07 PM
Re: Great Stuff Fail
Bummer, but better now than later! The silicone you added *should* have helped the GS stick, so I wouldn't spend time removing it. But you should probably wipe it down with alcohol before adding foam again (I assume the silicone is sticking to the glass fine). It can also help to silicone in something like egg-crate scraps to give the foam something extra to grab on to. Also, Dow's website says that GS cures faster with humidity, so maybe your hot humid garage made it cure too fast, leading to the failure.
The exact cause is anyone's guess, but I think you should do the minor fixes and give it another shot.