Cure Inhibition - Addition cured silicone rubber may be inhibited by certain contaminants in or on the pattern to be molded
resulting in tackiness at the pattern interface or a total lack of cure throughout the mold. Latex, sulfur clays, certain wood surfaces,
newly cast polyester, epoxy or urethane rubber my cause inhibition. If compatibility between the rubber and the surface is a
concern, a small-scale test is recommended. Apply a small amount of rubber onto a non-critical area of the pattern. Inhibition
has occurred if the rubber is gummy or uncured after the recommended cure time has passed. To prevent inhibition, one or more
coatings of a clear acrylic lacquer applied to the model surface is usually effective. Allow any sealer to thoroughly dry before
Even with a sealer, Mold StarŪ silicones will not cure against surfaces containing sulfur. If you are not sure if your clay
contains sulfur, do a small compatibility test before using for an important project.