I received this question via email the other day…
What is the best way to eliminate mold sweat?
Mold sweat, or condensation on the mold surface, occurs when the dewpoint of the air is higher than the mold temperature. When air reaches it’s dewpoint, water vapor will precipitate out of the air and accumulate on the mold surface. This condition often causes splay, blisters, or bubbles on the molded part.
To reduce condensation, the mold temperature can be increased, or the dewpoint or temperature of the surrounding air can be decreased by controlling the climate in the molding area. Blowing dehumidified air at the mold reduces the dewpoint…which lowers the possibility of condensation.