Good vs bad concrete for epoxy
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Uploader Comments (Dave88LX)
All Comments (22)
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It could serve as a good tip for Glendale home owners too.
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i am guessing the first was bad and the second was good.
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The water drop test helps. Acid etching is NEVER enough for good Epoxy systems. This is also helpful for floor covering systems that use water based adhesives that need to flash off into the concrete to cure.
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If it beads it is not good concrete.. ie it is already sealed no need for epoxy.
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nice to see the difference between Good and Bad concrete.
... i only wish i knew which was which :(
1 year ago 2
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@Dave88LX we use a propane "weed burner" torch at work to dry it out
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Still I wish you would have put some comments as to which one was the good vs bad. I take it the 2nd example was the bad.
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That was stupid not to have any explaination in the video.
TheE911mann 1 year ago 3
@TheE911mann The video wasn't made for general YouTube user population, it was put up for someone who I had previous discussions with who already knew what he was looking for.
Dave88LX 1 year ago 3
how about an acid wash to open the pours of the concrete? It works for grout, and would clean up any dirt or oil residue...
handymandan100 2 years ago
@handymandan100
Hey Dan,
I did do a thorough acid etching and a very thorough rinse after. These were stubborn spots where oil had been dripping or sitting for a very long time. The acid will rough up the concrete surface for better adhesion, but it won't lift oil out of the concrete. You can see the etched area where the water is soaking right in.
Dave88LX 2 years ago
@Dave88LX ... okay, how about an emulsion or primer? I mean, how do you dry out concrete? Gallons of denatured alcohol?
handymandan100 2 years ago
@handymandan100
A 36" fan blowing across it with the door open for about a week+ :)
Dave88LX 2 years ago