I think you are refering to flooring & adhesive manufacturers. From the moisture perspective, doesn't Ardex MC Ultra cover from sealing system through flooring if it fails?
exactly. You had better plan on CSP 3 on all jobs. Otherwise, lets say I'm called to inspect it, I would say ... "hmm it does say CSP 2-3 however on this project a CSP 3 would have been appropriate ... yada yada yada" for whatever reason I make up at the time (if I as an inspector am being paid by owner / owner attorney).
And those two exclusions are pretty common for what I call 'glue systems' aka glue products that will withstand moisture. Only when you get to the high end epoxy products do you get them accepting the concrete as is no matter what future moisture might attack it. And even then.... it is really all about the CSP achieved and the quality of applicator you work with. There are probably only 5-10 in California I would trust. (and California is kinda a big state)
What a load of bovine dung. Your going to tell me that an adhesive will not stick to a CSP-2? A CSP-3 LOOKS LIKE THE SURFACE OF THE MOON as compared to a CSP-1. That in itself will probably cause your coverage to drop DRAMATICALLY per gallon if used for a vapor retarder.
I have seen urethanes pull the crust of a smooth concrete surface off when demoing it.
Hmmm... I think a CSP 3 is pretty darn smooth.
Lots of specs call for a CSP 3, 4 or even 5 before finishing can take place.
Sounds like your urethane pulled off some concrete carbonation. Good concrete will have a tensile strength of around 350 psi. If it's under 250 psi I'd recommend doing something before coating it.
Concrete Answers for Flooring Problems