20 long D. leucomelas journal

[JimO]

One possibility is that as the foam expands and then develops a skin, the gas pressure might build up and push it away from the gas. Periodically after the foam has begun to dry, I poke a bunch of holes with a needle. If uncured foam seeps out of these holes, then pressure is definitely building up within the foam. This is particularly an issue with thicker applications. The holes are small enough that you'll never see them and it will allow the foam to cure more quickly.