Alligatoring paint

Alligatoring paint

 

Patterned cracking in the surface of the paint film
resembling the regular scales of an alligator.

Possible Causes of alligatoring paint

Application of an extremely hard, rigid coating, like an
alkyd enamel, over a more flexible coating, like a latex
primer.
Application of a top coat before the undercoat is dry.
Natural aging of oil-based paints as temperatures fluctuate. The constant expansion and
contraction results in a loss of paint film elasticity. Called Alligatoring Paint

Solution Alligatoring paint

Old paint should be completely removed by scraping and sanding the surface; a heat gun
can be used to speed work on large surfaces, but take care to avoid igniting paint or
substrate. The surface should be primed with high quality latex or oil-based primer, then
painted with a top quality exterior latex paint to void alligatoring paint problem.

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