"m Ransley" wrote in message
...
The concrete was probably to new or hard to paint , a good quality latex
should have been fine, scrape it all off and let it weather or acid wash
it.


Poor prep may well have been the downfall as opposed to bad paint.

Concrete with a good layer of efflorescence would cause paint to fail early,
acid washing removes this loosly adhered mineral layer and increases surface
area for a better bite for the paint to sink into.

Residual mold release (if it was used at the factory) would have compromised
adhesion and unremoved mold flash (messy bits at mold seam) would have
broken off and opened holes allowing water behind the paint sooner.

Cant really know for sure from here