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.
@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.
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.
oh god, please dont use this method. Epoxy can be installed on nearly any concrete surface if the prep has been done. A proper test is the calcium chloride test as specified by ASTM F-1869.
Actually, quite the contrary. You want the bare concrete to absorb the water. This shows that there are no contaminants/oils, and that the surface is roughed up and not sealed, so that the epoxy will be able to get a good 'bite'.
The part where the water beads up is bad, it's going to be more difficult for the epoxy to adhere to it.
What happened to your vocal chords? Cigarettes? Birth defect?
Sorry to hear about your disability....
By the way, do you have any suggestions for if you have control cracks cut in your slab and want to have an all smooth floor with epoxy....should I just use vinyl cement patch?
The bad section is where the water is beading up and being blow across the surface. Means that section is oil soaked/contaminated and needs further cleaning. If I epoxied over that, chances are the epoxy would not adhere and just lift off. You want the water to soak in like in the 2nd half of the video, this will make sure that the epoxy gets a good bite on the concrete and hold on.
It could serve as a good tip for Glendale home owners too.
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housevaluecheck 4 months ago
i am guessing the first was bad and the second was good.
junglesurvivalcamp 9 months ago
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.
DaemonEA 10 months ago
If it beads it is not good concrete.. ie it is already sealed no need for epoxy.
ZaphedBeebleBrox 1 year ago
nice to see the difference between Good and Bad concrete.
... i only wish i knew which was which :(
konzwambii 1 year ago 2
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
@Dave88LX
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.
youreadork 1 year ago
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 1 year ago
@Dave88LX we use a propane "weed burner" torch at work to dry it out
bigtorque 1 year ago
oh god, please dont use this method. Epoxy can be installed on nearly any concrete surface if the prep has been done. A proper test is the calcium chloride test as specified by ASTM F-1869.
edgray123 2 years ago
What do you think to the concrete base I was laid by North Construction?
logcabindisaster 2 years ago
I'm not sure what you mean...
Dave88LX 2 years ago
Obviously the one that absorbs water is bad !!!!!!!!!!!!!!!
starbrighter 2 years ago
Actually, quite the contrary. You want the bare concrete to absorb the water. This shows that there are no contaminants/oils, and that the surface is roughed up and not sealed, so that the epoxy will be able to get a good 'bite'.
The part where the water beads up is bad, it's going to be more difficult for the epoxy to adhere to it.
Dave88LX 2 years ago
Corral Dave - haha
na93prepre 2 years ago
What happened to your vocal chords? Cigarettes? Birth defect?
Sorry to hear about your disability....
By the way, do you have any suggestions for if you have control cracks cut in your slab and want to have an all smooth floor with epoxy....should I just use vinyl cement patch?
mullahaliackbar 2 years ago
The bad section is where the water is beading up and being blow across the surface. Means that section is oil soaked/contaminated and needs further cleaning. If I epoxied over that, chances are the epoxy would not adhere and just lift off. You want the water to soak in like in the 2nd half of the video, this will make sure that the epoxy gets a good bite on the concrete and hold on.
Dave88LX 3 years ago
do you have vocal cords? use them.
1ChocletDrop 3 years ago
I don't.
Dave88LX 3 years ago
so which one is bad? he's not saying anything.
billydelo 3 years ago 2