A client of mine accidentally spilled CLR (calcium, lime, rust remover) on his concrete floor, and it chewed into the surface, exposing some agggregate in an area about 2″ in diameter and 3/16″ deep at its center. I’ve been puzzling over how to repair this, since it’s too small and shallow to get concrete to stick in there, and yet it looks pretty awful. (Naturally, it is in the middle of an open area.)
I was thinking I could pour a little bit of casting resin in there, letting it find its level as water would and then just let it dry. The color of the spot would still be different from the rest of the floor, but the resin would at least maintain a flat, glassy surface that, I think, would minimize the visibility of the damage.
I guess if I wanted to I could tint the resin gray, which might help.
Anyway, there are two specific questions here:
1. Is resin a good choice here, or does someone know a better way to repair a shallow flaw in concrete that’s been finished with an acrylic sealer; and
2. Can anyone tell me how to do this? I can’t seem to find good info on how to cast resin on the web- though I confess I haven’t spent THAT much time hunting yet.
Any help would be lovely. Thanks!
Heather/ Seattle
Replies
There are cement based patching mixes that from from 1/2" to feather edge.
And there are floor leveling compounds.
Either should work for this.
We used some epoxy type patch from McMaster Carr http://www.mcmaster.com which comes in a gloss gray color to fill some concrete floor spots which were about 1/4" deep at the most and they are still perfect 4 years later.
Hope this helps. Rich.