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Question posted - August 2 to August 8, 2015:

How do you strip paint from a cementitious substrate if you can’t alter the surface texture?

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Selected Answers

From john bares of its really concrete, inc. on October 22, 2015:
 If we took the work, we'd diamond grind and overlay. Compared to cleaning up soy products' residue, grinding dust is a piece of cake.

From Catherine Brooks of Eco-Strip of Eco-Strip on August 11, 2015:
Thanks, folks, for confirming our advice given to DIY homeowners and contractors for "Will your infrared paint remover work on historic brick?" We answer that the heating and scraping will likely damage the already degrading surface and to use soy gel as a gentle stripper.

From Michael Quaranta of OPERATIONS 40 on August 10, 2015:
OK, now for the English lesson: cementious is an adjective not a noun.

From Tom Schwerdt of Texas Department of Transportation on August 10, 2015:
Dry ice blasting will work in some cases, and you don't run the risk of your liquid stripper soaking into the substrate. It depends on the relative toughness of the coating and the substrate. Epoxy over old brick and mortar? You probably can't get the coating off without damaging the substrate no matter what the method. Latex over a dense structural concrete column? Should work great.

From Jaime Molina of Primary Materials Inc. on August 7, 2015:
You can partially dissolve acrylic and epoxy coatings using soy gel, available from some suppliers. Avoid damage to substrate by removing remnants with low pressure water jet.One supplier also supplies vegetable-based paint strippers.

From Warren Brand of Chicago Coatings Group on August 6, 2015:
Hi Michael - loved the pun! However, a Google search of cementitious turned up 669,000 hits in 0.22 seconds. Question made perfect sense to me.

From Michael Quaranta of OPERATIONS 40 on August 5, 2015:
There was this story about painters thinning paint. The advice was "re-paint you thinners and thin no more . . . " I'd like to respond to this question, but I can't find the word "cementitious" in the dictionary!!! Must be some kind of an industry special secret ingredient word? Then to answer this poorly worded question, bead-blast the floor and retain the surface texture with the proper concrete coating and don't use just paint.

From Michael Halliwell of Thurber Engineering Ltd. on August 5, 2015:
I'd agree with Warren...you're likely looking at a liquid stripper. Depending on the adhesion, I suppose there is the possibility of using a high pressure water wash, but if the coating is too well adhered, you'd need to increase the pressure to strip the paint and could alter the texture.

From Warren Brand of Chicago Coatings Group on August 4, 2015:
You can use various types of liquid-applied strippers, and, perhaps, dry ice blasting - but I'm not certain about the latter.

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Tagged categories: Cementitious; Paint and coatings removal

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