Chem-Set RTV664 High-Durometer Silicone Mold Kit, 44 Lb

Description

RTV664 silicone is a two-part, addition-cure mold making compound for shops that need a high-durometer silicone rubber with dimensional stability. Chemical Concepts lists this 44 lb Chem-Set kit for production molding work, and published RTV664 data describes a material designed for high production, chemical resistance, abrasion resistance, and low shrink behavior.

RTV664 silicone Benefits

• High-durometer cured rubber helps molds hold shape when dimensional stability matters.
• Two-component addition-cure chemistry supports controlled shop processing.
• Published data notes high tear strength and chemical and abrasion resistance.
• Room-temperature cure is available, with elevated-temperature curing used when faster handling is required.
• 44 lb kit size fits production users who need more material than a trial package.

The product is a strong fit when a flexible mold must resist distortion during repeated casting cycles. Mold shops should still test the pattern material, release system, cure schedule, and casting material before approving a production process.

RTV664 silicone Applications

• High-durometer molds for manufacturing lines and repeat casting jobs.
• Tooling where low shrink behavior and dimensional control are important.
• Mold making for parts that need chemical or abrasion resistance in service.
• Shop trials where a firmer silicone is preferred over softer mold rubbers.
• Production molding teams standardizing material packages by kit size.

Mix, degas, and cure according to current technical data. The data sheet recommends vacuum degassing to remove entrapped air before cure, which helps reduce voids in the finished rubber. Keep batch size, mix ratio, temperature, and cure time consistent so operators can compare results across jobs.

Ordering and Technical Support

For related casting and mold making materials, browse Chemical Concepts molding materials. For broader adhesive and sealant industry context, visit the Adhesive and Sealant Council. Need help matching this kit to a mold process? Call (800) 220-1966 or email [email protected].