Sound deadner

Riddler said

Give it time. Also wait for it to fall off the ceiling and onto the headliner. Hopefully you have a board not just the rods/cloth. I've had the pleasure of helping a friend remove this from a car he did when it hit 100 degree's out and it melted off of everything.

Riddler

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It's been on the car for 4 years now, for one of those years the car has been sitting non-operational but the rest of the time I drove it everywhere. Several times I let the car sit in 100+ degree weather with the intense Colorado sun (you don't know sunshine until you've been at high altitude) beating down on the roof, nothing happened... I was waiting for it to melt and fall down since I have no headliner, it never happened. It never started outgassing either. I honestly expected it to fall off and I'm not holding my breath for it to last forever but it's holding up surprisingly well. I cleaned the underside of the roof sheetmetal very thoroughly with brake cleaner and let it air out before I put the stuff on, also did it in direct sunlight when it was already hot out and used a sturdy small paint roller to really press it on hard and get the backing material to really stick "into" the metal.

I still definitely wouldn't say it's better than the actual as-advertised sound/heat deadener stuff but it's decent and gets the job done on the cheap.

EDIT: Also if this stuff is designed as roofing repair, why the heck would it break down at high temps in direct sunlight? That's precisely what it's supposed to hold up against...?