Liquid mask issue

[julianb]

Hey chaps,

Noticed with my last bottle of RCS mask that successive coats seem to shrink/craze, leaving a 'lizard skin' type pattern, rather than a nice smooth film. Unlikely to be a problem as the previous coats have given impervious coverage.

Any ideas? I've not seen it happen before. The mask has been sprayed on, then left to air dry outside. Could it be direct sunlight that's causing the issue? Or am I not leaving the previous coat long enough to dry fully?

Cheers

Ju