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Bodgey Builder 09-03-2010 01:26 AM

Solution for silicon?
I'm trying to get some old (but not very old) silicon caulk from a lightly porous surface. Some friends recommended hydrochloric acid. The silicon repels it handily. Does anyone out there know what will disolve this stuff?

Thanks in advance!

Ron6519 09-03-2010 06:43 PM

You will not dissolve the caulking. You can remove most of it by cutting, and you might remove the residue by sanding.

fabrk8r 09-03-2010 06:49 PM

The only way I know to remove silicone caulk is by abrasion.
Sometimes it can be scraped off with a sharp razor blade, but there is usually some residue left that will need to be removed by abrasion of some sort,
especially if you are working with a porous surface.

I wouldn't recommend using hydrochloric acid for a couple reasons. The fumes are noxious and hazardous. Also it is so caustic it may damage the surface you are trying to restore.

kwikfishron 09-03-2010 07:02 PM

Pumas stone and soapy water works good on the residue.

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