This general purpose tin-catalyzed silicone rubber is a two-part, room-temperature vulcanizing system designed to deliver consistent, high-fidelity mold reproduction for a wide variety of casting applications. It is formulated with a user-friendly mixing ratio that minimizes measuring errors and reduces material waste, making it an excellent choice for small studios, educational workshops, and industrial prototyping environments alike.
The liquid silicone features a medium viscosity that flows easily over complex master models, capturing fine surface details—from wood grain to skin texture—without the mandatory use of vacuum degassing. It offers a comfortable working time of approximately 30 minutes at standard room temperature, which provides ample opportunity for brush-on layering, glove-mold construction, or multi-piece block mold setups. Demolding can typically be carried out within 6 to 8 hours, and the material reaches full physical properties after 24 hours of ambient cure.
Once fully cured, the rubber exhibits a balanced hardness of Shore A 20, combining sufficient rigidity to hold the mold cavity shape with enough elasticity to release intricate undercuts without tearing. Its tensile strength and elongation at break ensure long mold life when casting plaster, wax, polyester resin, or polyurethane foam. Linear shrinkage is controlled below 0.3%, guaranteeing that every cast remains dimensionally accurate from the first copy to the last.
This tin cure silicone releases a neutral alcohol by-product during cure, meaning it is non-corrosive to most pattern materials and safe for use in confined spaces with basic ventilation. It can be easily pigmented with silicone colorants for layer identification, and thixotropic additives are available to adapt the material for vertical or overhead application. For customers seeking a reliable, no-fuss molding material that balances performance with affordability, this grade provides a proven solution backed by batch-to-batch quality consistency.
