Two-Part, Platinum RTV (Addition Cure) silicone rubber with an extended work time (Pot Life 1.5 Hours) designed for mold making. This system is ideal for making molds used for food contact as well as standard mold making applications. R-2237SL is great for soap, wax, chocolate, candies or other food products. R-2237SL has been tested to meet the requirements of FDA Extraction Test: CFR 177.2600, Code Of Federal Regulations www.access.gpo.gov/nara/cfr-table-search.html For further information, please contact technical support.
Cured Compound 24 hrs. @ 77F (25C)
Mix Viscosity @ RT: 60,000
Specific Gravity: 1.08
Mixing Ratio A/B: 10/1
Durometer: 35 +/-5
Pot Life: 1.5 Hours
Tensile Strength (PSI): 700
Tear Strength (PSI): 80
Elongation %: 300
The base and curing agent are mixed just before using. Mix 10 parts base to 1 part-curing agent by weight. Automatic mixing equipment or manual mixing may be used to combine base and curing agent. Immediately after mixing, place the material in a vacuum chamber to remove trapped air. As the vacuum is drawn, the material will expand as much as four times its original volume. Remove from vacuum chamber and pour very gently, so as not to incorporate air into the material. If, after overnight cure, surface is tacky, add mild heat to finish cure (150F for 30 minutes). Use Klean Klay for creating dam walls when making 2-part molds.
Kit Kraft is a craft and hobby shop in the Los Angeles area and an online store that sells a large variety of arts and craft supplies. Whether it is bulk quantities of glitter to cover a fashion show runway, sculpting material for your art piece or crafting a gift to inspire a friend, our supplies are designed to help bring creative ideas to life.