Dow Corning 1891961 Rtv Silicone Joint Sealant 3 Oz Silver

Product Description

The DOW CORNING 1891961 is an RTV silicone joint sealant in a 3 oz tube, formulated for sealing, bonding, and gasketing applications across a wide range of industrial and mechanical systems. Part of the Series 732 line, this silver-colored compound cures at room temperature and reaches a tack-free state in 20 minutes, with full cure achieved in 24 hours. It is rated for continuous service from -76 degrees F to 356 degrees F (-60 degrees C to 180 degrees C), making it suitable for high-heat environments encountered in HVAC, plumbing, and equipment maintenance. Licensed tradespeople and maintenance technicians apply this sealant where flexible, durable, temperature-resistant seals are required.

This sealant is commonly used in residential and commercial applications where joints, seams, or mating surfaces require a resilient, heat-resistant seal. Typical uses include HVAC ductwork connections, equipment housings, metal-to-metal joints, and general mechanical assembly. It adheres to glass, metal, and plastic substrates, giving installers flexibility across multiple material types. The Series 732-Aluminum designation indicates the silver pigment and aluminum-filled formulation, which suits applications where a metallic finish or added thermal conductivity is beneficial.

Key Features

• RTV silicone chemistry cures at room temperature without heat or specialized equipment
• Tack-free in 20 minutes, full cure in 24 hours for fast return to service
• Operating range from -76 degrees F to 356 degrees F (-60 degrees C to 180 degrees C)
• Adheres to glass, metal, and plastic substrates
• Food-safe formulation meets 21 CFR 177.2600 and MIL-A-46106 standards
• Silver color suits metallic surface applications and provides a clean finished appearance

Compatibility

Designed for use on glass, metal, and plastic substrates. Meets 21 CFR 177.2600 (FDA food-contact compliance) and MIL-A-46106 military specification. Part of the DOW CORNING Series 732 product line.

Installation Notes

Clean and dry all mating surfaces before applying sealant to ensure proper adhesion. Power down or isolate any equipment being serviced before applying sealant to joints or housings. Allow the full 24-hour cure time before subjecting the joint to operating temperatures, pressure, or mechanical stress. Application is typically performed by HVAC technicians, plumbers, or general maintenance professionals using standard caulking or applicator tools appropriate for 3 oz tubes.