Polyurethane membrane has bubbles at some points of application

POTENTIAL CAUSES OF THE PROBLEM

Entrapped moisture content at substrate

SOLUTION

1: Cut bubbles with a spatula or a knife
2: Mop surface with STATUS LS-703 solvent
3: 3 – 4 hours later apply one coat of FLX 390 PU
4: When FLX 390 PU is dried (and not after 12 hours) proceed with application of FLX 390 TOP COAT

Products used: