CAUSE:

Liquid solvent (thinners/reducers) becomes "trapped" in the paint film when the surface layer skins over too quickly, preventing their evaporation into the atmosphere. Solvents that vaporize within the paint film leave bubbles, pinholes or craters as they push through and "pop" the surface. Solvents can be trapped due to:

1. Excessive film thickness from puddling in tank.
2. Too hot and/or too humid atmospheric conditions.
3. Too hot/warm tank conditions.
4. Moisture remaining in tank.

REPAIR:

1. Allow surface to completely cure and reevaluate.
2. Strip out and remove using KBS Strip. Repeat AquaKlean, RustBlast, and Gold Standard Tank Sealer steps.

PREVENTION:

• Allow tank to reach room temperature before applying sealer.
• Do not attempt to apply sealer in direct sunlight, as tank surface and inside air will be too warm.
• Drain out excess sealer.
• Avoid allowing coating to puddle/pool inside tank.
• Avoid too hot/humid atmospheric conditions (ideal = 55°-82°F/13°-28°C)
• Do not allow tank to "cure or dry" in direct sunlight.
• Keep tank away from heat while curing.

Check out all of our Tank Sealer Fix-It Guides here: http://www.kbs-coatings.com/fix-it-guide-tank-sealer.html