Epoxy being installed, need opinion on something

[bullhurly]

I have a professional installing my epoxy. Today, he went to scrape the painted chips, and near the edge of the garage, some epoxy lifted and left about a quarter sized amount of exposed concrete.

He used some technical jargon as to why this happened, but said he would fix it.

My question is, should I be concerned at all about it lifting in the future? I know he was scrapping the paint chips off pretty hard, so maybe this is normal?

Any help would be much appreciated, as he will be completing the project tomorrow, and I will be handing over the funds.

 

[bullhurly]

Also, he used Amerlock Epoxy 400. Is this stuff considered to be pretty good quality?

 

[tc2000]

Maybe he wasn't diligent enough with the acid wash and scrub near the edges? I had to redo some edge areas after I found residue when I did the finger test.

 

[bullhurly]

Maybe he wasn't diligent enough with the acid wash and scrub near the edges? I had to redo some edge areas after I found residue when I did the finger test.

He used a diamond grinder, although I noticed he didn't go all the way out to the edge of the concrete. At least, it looked like he stopped about an inch away...

 

[tc2000]

I'm brand new to this so wait for the expert's opinion. But I would sure want to prove the theory and have him scrape a few more locations close to the edges where he didn't grind and in some inconspicuous spot in the middle where it *was* ground. If there's a dramatic difference between the two, at least you'd have more data to decide what to do.

 

[bullhurly]

I'm brand new to this so wait for the expert's opinion. But I would sure want to prove the theory and have him scrape a few more locations close to the edges where he didn't grind and in some inconspicuous spot in the middle where it *was* ground. If there's a dramatic difference between the two, at least you'd have more data to decide what to do.

He put down one of the clear coats today.. I wonder if he will be able to scrape without screwing it up?

 

[thegarageguy]

Just because it is diamond grinded doesn't mean it is fail proof. Any dust residue will prevent penetration and could cause lifting or failure. Sometimes the slab is very hard and you need softer diamonds to cut into it properly. Wrong diamond grit may result in inadequate prep as well. Maybe it was just a small spot that had a bit of contamination. Hopefully the guy gave you a decent warranty and stands behind his work.

 

[bullhurly]

Just because it is diamond grinded doesn't mean it is fail proof. Any dust residue will prevent penetration and could cause lifting or failure. Sometimes the slab is very hard and you need softer diamonds to cut into it properly. Wrong diamond grit may result in inadequate prep as well. Maybe it was just a small spot that had a bit of contamination. Hopefully the guy gave you a decent warranty and stands behind his work.

He did give me a warranty, but the job is still ongoing. He has to come back tomorrow morning, fix a few areas (area where it lifted included), then lay the last clear coat on. I believe he said it as a Polyaspartic clear coat.

Can anyone tell me about the Amerlock epoxy he used? Is it a pretty good product? I've searched, but found limited information on this forum about it.

Gonna grab a photo of the area in question right now, then post it here. Perhaps that will give you guys a better idea of whats going on.

So, picture incoming shortly.

 

[bullhurly]

 

[bullhurly]

Up above, is a picture of the area where the epoxy lifted while he was scraping the paint chips.

He said it wasn't a big deal and that he will fix it tomorrow. I'm a little worried that if that lifted, more might lift later on.

I don't know a whole lot about epoxy flooring, so perhaps you guys can help me out? Big deal or no?