PVC board paint blistering
Reason: ? The substrate is wet
· The ambient humidity is too high during construction
· After a brief dry rain
· Putty water resistance is poor
· Recoating time is short
· The substrate temperature is too large
· Substrate loose.
Due to the high temperature of the bubble.
1, the product is ready to be placed after cooling for two to three days, not sun exposure or baking at high temperatures.
2, blistering, paint is a common common defects. Which is sometimes dry, sometimes liquid. Foaming is large and small, shape hemispherical. The size is usually related to the strength of the adhesion of the substrate, or the bond strength between the coatings, and the pressure within the bubble or blister
3, if the bubble continues to the substrate: should find ways to eliminate the source of moisture, repair loose caulking glue, consider installing the exhaust fan, remove the bubbles. If the bubble does not extend to the substrate: the bubbles should be scraped off, and then polished, any must be on the primer, and finally re-coating high-quality paint.
