Printable Version of Topic

Posted by: sixaddict Jul 1 2022, 12:59 PM

A while back I had seen a post suggesting factory foam inside body panels could be dissolved using acetone.
Tried it without success.
Anyone out there have any formula that works?
This is in the hood of a 911 so not able to dig it out with tools.
TIA

Posted by: mepstein Jul 1 2022, 02:02 PM

I was going to try gasket remover. It’s strong stuff.

Posted by: sixaddict Jul 1 2022, 07:33 PM

Worth a try.
Thanks

Posted by: davep Jul 1 2022, 07:53 PM

You need to do a bit of research. Cured PU foam is a real bitch to dissolve, but may break down with intense UV light. We used to use Cellosolve to clean tools and equipment before the foam cured.

Posted by: sixaddict Jul 2 2022, 09:23 AM

Thanks

Posted by: worn Jul 2 2022, 09:46 AM

If you look at my ell hole thread I show the piece from inside the rear corner above the tail light. Dissolving is going to be hard because the foam is coverd by thick rubber sealant, which is even more rust collecting. Once the sealer is removed the foam can sometimes be simply pulled out. It is difficult but I have had success welding different wire wheels to quarter inch rod and grinding away with a drill. The sealant softens with heat, so I us3d a torch in places. It can catch fire easily, but if confined, that isn’t too big a problem. Use ventilation. After a lot of hard work i have all the foam out. The foam in the sail is the hardest.

Posted by: bkrantz Jul 2 2022, 08:14 PM

I never found a solvent I was able and willing to work with that had much effect on the factory foam. I removed mine with LOTS of picking and scraping.

Posted by: mb911 Jul 3 2022, 06:06 AM

This is what your looking at to get rid of.

Posted by: ClayPerrine Jul 4 2022, 08:35 PM

Over the years, I have used Berrymans B12 carb cleaner with varying results. Sometimes it dissolves it, sometimes it seems to be a little tougher. You have to get through the tar on the outside first, though.

Clay