After dispensing required amounts of Parts A and B into mixing container (1A:1B by volume or weight), mix thoroughly for 3 minutes making sure that you scrape the sides and bottom of the mixing container several times. MEASURING & MIXING -Before you begin, pre-mix Part B thoroughly. If there is any question about the effectiveness of a sealer/release agent combination, a small-scale test should be made on an identical surface for trial. Follow with a light mist coating and let the release agent dry for 30 minutes. IMPORTANT: To ensure thorough coverage, lightly brush the release agent with a soft brush over all surfaces of the model. Mann Ease Release™ products are available from Smooth-On or your Smooth-On distributor. Ease Release™ 200 is a proven release agent for use with silicone rubber. Do a small scale test for compatibility before using on your project.Īpplying A Release Agent - Although not usually necessary, a release agent will make demolding easier when pouring into or over most surfaces. Note: Even with a sealer, platinum silicones will not work with modeling clays containing heavy amounts of sulfur. Allow any sealer to thoroughly dry before applying rubber. To prevent inhibition, one or more coatings of a clear acrylic lacquer applied to the model surface is usually effective. Inhibition has occurred if the rubber is gummy or uncured after the recommended cure time has passed.īecause no two applications are quite the same, a small test application to determine suitability for your project is recommended if performance of this material is in question. Apply a small amount of rubber onto a non-critical area of the pattern. If compatibility between the rubber and the surface is a concern, a small-scale test is recommended. Latex, tin-cure silicone, sulfur clays, certain wood surfaces, newly cast polyester, epoxy or urethane rubber may cause inhibition. These products have a limited shelf life and should be used as soon as possible.Ĭure Inhibition – Addition-cure 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.

Storing material at warmer temperatures will also reduce the usable shelf life of unused material. Warmer temperatures will drastically reduce working time and cure time. Store and use material at room temperature (73☏/23☌). Latex gloves will inhibit the cure of the rubber. Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk. Safety– Use in a properly ventilated area (“room size” ventilation).

Flex type cast