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 Post subject: garage floor paint
PostPosted: Thu Aug 03, 2017 6:08 pm 
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Joined: Mon Apr 30, 2012 1:20 pm
Posts: 28
Planning to finally paint the garage floor - 15 year old slab with typical engine block droppings and wheel smudge.

Paint co instructions were to remove all the oil / stains before applying epoxy paint - even suggested using Simple Green HD to degrease. So after 4 tries, although now somewhat less vibrant, the 'stains' are still there - and a shoulder shrug from Simple Green.

Anyone have a good plan B???

Really don't want to grind it. But anyone know a grinder just in case?


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 Post subject: Re: garage floor paint
PostPosted: Thu Aug 03, 2017 9:08 pm 
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Joined: Thu May 20, 2010 7:27 pm
Posts: 211
From what I recall when I painted mine (15+ years ago), you don't need to remove all visible traces of the stains, which can run fairly deep into the concrete. You just need to be certain that what remains is not hydrophobic. Once you've accomplished that, it should accept the paint with no trouble. (This assumes you're using a two-part epoxy paint.)

Keep scrubbing, rinsing and repeating until there is absolutely no beading over/around the stains. Check again after etching; if the rinse water pulls away from the stains again, repeat the whole process in that area.

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 Post subject: Re: garage floor paint
PostPosted: Fri Aug 04, 2017 8:56 am 
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Joined: Wed Sep 15, 2004 2:24 pm
Posts: 396
Location: Shrewsbury
Many good floor epoxies strongly recommend the use of muriatic acid to clean the concrete. You will have to flush thoroughly with water and allow to completely dry before applying the epoxy.

Dave

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 Post subject: Re: garage floor paint
PostPosted: Fri Aug 04, 2017 3:20 pm 
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Joined: Fri Jan 14, 2005 7:55 pm
Posts: 967
I used to use Muriatic acid on concert pools to prepare for paint, just be careful with it, comes by the gallon. I would also try using a power washer with the Simple Green ? Let us know how it works out, mine is next !! 8)

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 Post subject: Re: garage floor paint
PostPosted: Sat Aug 05, 2017 9:45 pm 
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Joined: Wed Jul 05, 2017 8:49 pm
Posts: 11
ive been using the products at home depot on the concrete floors and they hold up and work really well under heavy use (ie fork lifts and pallet jacks )


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