Will anything clean foam insulation off a floor?

cs6000March 17, 2010

Thought about posting this in the "cleaning tips", but think this forum gets more attention from people using foam insulation.

I had some foam sprayed on a vaulted ceiling. Our floors are acid stained concrete, which were finished, and covered with cardboard.

Of course, during the spray, a little bit dropped between a spot where the cardboard was pulled away from the wall, and hit the concrete stained floor. I scraped it off as much as possible, but there are still some spots or residue.

Its not bad, but I'd like to get it off. I've tried Goof Off, Krud Kutter, and lacquer thinner, none worked.

My next plan is to try and stain the spots the color of the floor.

Any suggestions?

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phillipeh

Same situation, but our idiot floor guy (contractor's sub) sealed the foam droplets into the concrete. And no, there's no way to get it up.

    Bookmark   March 17, 2010 at 10:08AM
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brickeyee

There is no solvent for most of the foams once they have cured.

Mechanical removal is about it.

Cut off as much as you can with single edge razor blades, and then use a wire brush (preferably not steel) to try and remove anything that remains.

A steel brush can cause a rust spot to form from moisture in the concrete and the steel the abrades onto the surface of the concrete.

    Bookmark   March 17, 2010 at 11:14AM
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reyesuela

DW-40 worked on my skin... (oops......)

The glob that got on my floor I got up with a razor.

    Bookmark   March 19, 2010 at 1:54AM
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coloradomomof5

I'm the personal assistant to the owner of an insulation company that uses spray foam. I will ask her and see what she says and get back to you.

    Bookmark   March 19, 2010 at 6:32PM
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coloradomomof5

I got a reply-you have to sand it off.

    Bookmark   March 19, 2010 at 7:44PM
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cs6000

Why didn't I think of sanding? Will have to be careful, but should be able to get the stuff off prior to hitting the actual stained concrete. May have to recoat some of the sealant, but its worth a try.

Thanks

    Bookmark   March 21, 2010 at 8:44AM
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brickeyee

"Why didn't I think of sanding?"

This tends to cause damage to a larger area than the spot.

Picking it off is the low damage path.
Cut it off with razor blades as much as possible, then go after any remaining spots.

    Bookmark   March 21, 2010 at 10:15AM
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manhattan42

Acetone is the solvent used to thin/remove most spray foams, and can be effective even when they have dried.

But care should be given not to use acetone on materials that can be dissolved, discolored or otherwised damaged by this chemical, including vinyls, plastics, and most paints.

    Bookmark   March 21, 2010 at 5:06PM
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brickeyee

"Acetone is the solvent used to thin/remove most spray foams, and can be effective even when they have dried. "

Once polyiso foam (the common can stuff) has cured acetone will no longer dissolve it.
It will dissolve the uncured foam.

There is NO solvent for many of the foams once curing has completed. These are on-way chemical reactions. unless you want to go after strong acids and bases.

    Bookmark   March 21, 2010 at 7:35PM
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coloradomomof5

Another possible solution from a drywall/insulation owner: ammonia and a wire brush. Be sure to use a dust mask.

    Bookmark   March 21, 2010 at 9:21PM
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nobodyporter_yahoo_com

Before sanding i would suggest using a green scotch brite pad.My husband and I are foam techs.We use the green scotch bright pads on almost anything.it will scratch the finish if you rub too hard but makes a small area to have to refinish.good luck!

    Bookmark   June 24, 2011 at 11:06PM
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