Dow Corning 2112531 Rtv Silicone Joint Sealant 3 Oz Black

Product Description

The DOW CORNING 2112531 is a black RTV silicone joint sealant packaged in a 3 oz tube, part of the Series 732 product line. It seals and bonds joints in applications where wide temperature swings and chemical resistance are critical. The sealant operates across a range of -76 degrees F to 356 degrees F, making it suitable for HVAC housings, mechanical enclosures, and food-processing equipment. It reaches a tack-free state in 20 minutes and achieves full cure in 24 hours. HVAC technicians, plumbers, and maintenance professionals use this sealant where a flexible, durable silicone seal is required around metal, glass, or plastic substrates.

The 2112531 is suited for both residential and commercial service work. Common applications include sealing around ductwork flanges, equipment access panels, plumbing penetrations, and food-safe equipment joints. Its food-safe rating under 21 CFR 177.2600 makes it appropriate for installations in commercial kitchens and food-processing facilities. The black color blends with dark surfaces and is useful when aesthetics matter in visible joint locations. The compact 3 oz tube is a single-use or spot-repair size well matched to service calls and maintenance kits.

Key Features

• RTV silicone chemistry provides flexible, permanent sealing after cure
• Operating temperature range of -76 degrees F to 356 degrees F suits high-heat and cold environments
• Tack-free in 20 minutes, fully cured in 24 hours
• Food-safe rating per 21 CFR 177.2600 for use in food-contact adjacent installations
• Meets MIL-A-46106 military specification
• Adheres to glass, metal, and plastic substrates

Compatibility

Designed to adhere to glass, metal, and plastic surfaces. Suitable as a general-purpose RTV silicone joint sealant for HVAC, plumbing, and mechanical sealing applications where food-safe and wide-temperature-range compliance is required.

Installation Notes

Apply to clean, dry surfaces free of oil, dust, and loose material for best adhesion. HVAC technicians and maintenance professionals typically apply this product with a standard caulk-tip tube — cut the tip to the desired bead size before dispensing. Allow the full 24-hour cure time before exposing the joint to liquids or mechanical stress. Work in adequately ventilated spaces, as RTV silicone releases acetic acid during cure.