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Old 03-27-2012, 09:40 AM   #1
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Removing Adhesive and Paint from Concrete


Does anyone have any recommendations on removing stubborn outdoor carpet adhesive and paint from concrete?

I have a large terrace that I am looking to set tile on so I am trying to get it down to bare concrete. The concrete has some industrial strength adhesive bonded to the concrete from the outdoor carpet I took up along with at least 2 layers of paint, most likely oil based. Iíve tried scrapping, chemicals, 3500 psi pressure washing and a handheld grinder with some sort of scrapping/grinding wheel that only heated up the adhesive and gummed up the wheel pretty quick.


The two suggestions which I am headed towards are an industrial grade floor buffer with most course wheel I can get or a walk behind concrete grinder/scarifier. Both options are $200 plus rental. The buffer I am afraid will gum up like the hand grinder I tried. The scarifier sounds excessive.

Any other suggestions? I have learned that chemicals are a no-no for thin-set. Also, if the adhesive is so well bonded to the concrete and it was troweled on in a circular pattern, would this accept and hold thin-set?

Thanks,

John

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Old 03-28-2012, 09:33 AM   #2
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Removing Adhesive and Paint from Concrete


Having just gotten carpet glue / thinset off concrete:
-hammer drill with a tile chisel- use the hammer only function. The carpet glue actually came up best with this but it wasn't tacky. Not sure if indoor vs outdoor glue is a big diff


Last edited by Polapea; 03-28-2012 at 11:16 AM.
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Old 03-28-2012, 11:06 AM   #3
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Removing Adhesive and Paint from Concrete


http://www.soybiobased.org/find-prod...astic-remover/
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Old 03-28-2012, 04:01 PM   #4
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Removing Adhesive and Paint from Concrete


Floor scraper may get the adhesive off also.
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Old 03-29-2012, 11:11 AM   #5
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Removing Adhesive and Paint from Concrete


Iím trying to avoid using chemicals because I have to use thin-set to set tiles and I donít want to take the chance the chemicals wonít let the thin-set bond to the concrete. Iíve tried a floor scrapper and got no where. I like the hammer drill with the chisel tip. Might have to give that a try. The rental company said the concrete grinder/scarifier will gum up and be useless. No one in my area rents shotblasters which sounds like my best option.
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