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Old 01-30-2013, 08:33 PM   #1
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Can my slab take epoxy?


I am seriously considering an epoxy floor coating for my basement. I have seen some very cool effects that can be done and epoxy seems to solve a lot of potential basement floor problems.
However, the floor is currently covered in carpet with a thin rubber backing that is all glued down with a thin layer of mastic. If I had to guess I would say it was installed in the late 60s (based on the color and style). Subsequent layers of carpet have been laid on top. there is no evidence of any moisture issues in the areas I have pulled up so far.
I was planning on renting a scraper to remove the mastic. I think the concrete is in decent condition but I am worried that the epoxy won't be able to adhere due to the mastic that is sure to remain in the concrete after I scrape it smooth.

Basically, can I scrape off the mastic and then proceed to prep the floor as usual for an epoxy coating, or would it be a waste of time and money to try? Could I grind away enough concrete to make it work or would I have to do a skim coat of new concrete?

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Old 02-01-2013, 02:42 PM   #2
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Can my slab take epoxy?


What does the manufacturer recommend? I would do that.

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Old 02-01-2013, 03:35 PM   #3
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Can my slab take epoxy?


sand the concrete.
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Old 02-01-2013, 03:39 PM   #4
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Can my slab take epoxy?


Once mastic hits the floor I see no way paints going to stick.
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Old 02-01-2013, 05:11 PM   #5
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Can my slab take epoxy?


it will if he sands it first, i know i am going to have to do that with the floor of the shop i am remodeling.
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Old 02-01-2013, 05:59 PM   #6
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Can my slab take epoxy?


Quote:
Originally Posted by dftc View Post
I am worried that the epoxy won't be able to adhere due to the mastic that is sure to remain in the concrete after I scrape it smooth.
You are correct on the epoxy not sticking to the mastic. You would either have to etch the concrete, rent a floor grinder to remove the mastic or hire a professional to do the work for you if itís within your budget.
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Old 02-01-2013, 07:19 PM   #7
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Can my slab take epoxy?


Thanks for the replies. I have done some more research since I first posted the question and I think grinding will be the way to go for the best results. If it was a garage I might consider some other options, but grinding should get me good results without using chemicals in my poorly ventilated basement. I already have some decent dust extraction equipment do I'm not too worried about that.

What really annoys me if that there was no good reason to glue this rubber-backed carpet down in the first place.

Now, to research the costs of grinding...

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