Blushing on Urethane
Blushing on Urethane
(OP)
Has anyone ever encountered any blushing problems on a Epoxy/High Gloss Urethane paint system. We completed a job about a year ago,and 4 months after completion the lines started to show considerable blushing (blotches) through out the project. The lines operate from ambient to occassional 120 deg F. We have hired 2 different outside coating inspectors and we seem to have them baffled also. We are currently waiting on lab results again. Thanks in advance for any suggestions.
RE: Blushing on Urethane
RE: Blushing on Urethane
I wonder if this could be either physically affecting the PU or could have caused a reaction with the urethane when it was applied that compromised the cure and it is the affected PU that you're now experiencing.
Along the lines of "One test is worth a 1000 opinions" good FTIR analysis and SEM examination(replicated as needed)of the "blotchy" and "unaffected" areas and even an "ideal" sample should help your investigation.