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burga
Removing spray foam

Hi,

I need to expose the ends of some carriage bolts that some time ago were buried under spray foam insulation. I was surprised to find it difficult to "pick" it away, so I'm wondering if there is a solvent of some kind that might be used to dissolve the insulation or make it easier to remove in a case like this?

Thanks,
Dave

MLB Construction
Re: Removing spray foam

aside from the spray foam insulation gun cleaner which dissolves it prior to it becoming rigid, i believe you're going to have to do it the old fashioned way.

keith3267
Re: Removing spray foam

This is just from memory, which isn't all that reliable lately, but I recall something about PB Blaster dissolving a styrofoam cup in seconds. This is a spray penetrating oil and solvent available at most auto parts stores. Your foam may not respond to this as it is unlikely to be styrofoam.

ordjen
Re: Removing spray foam

None of the common solvents found at the hardware or homeowner stores will touch cured urethane foam. NMP will cut it, but i don't know where to get it commonly.

Keith, we used to send the new guys down to the truck with a styrofoam cup to get some lacqer thinner. The lacquer thinner comes through the bottom of a styrofoam cup as if it weren't even there! :)

burga
Re: Removing spray foam

Hi All,

Thanks for the suggestions. I ended up going old fashioned. It actually wasn't too bad, I used a pair of needlenose pliers to pull out clumps. A little tedious, but it worked.

Dave

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