Dow Corning 99179209 Rtv Silicone Sealant 10.1 Oz Black

Product Description

The DOW CORNING 99179209 is an RTV silicone joint sealant supplied in a 10.1 oz cartridge, formulated for gasket-forming and sealing applications across a broad temperature range. Part of the 732 series, this black sealant cures at room temperature and bonds to glass, metal, and plastic substrates. It reaches a tack-free state in 20 minutes and achieves full cure in 24 hours. The operating temperature range spans -76.0 degrees F to 356.0 degrees F (-60.0 degrees C to 180.0 degrees C), making it suitable for demanding thermal cycling environments. Licensed plumbers, HVAC technicians, and maintenance professionals commonly use this product for sealing joints, forming gaskets in place, and preventing leaks in mechanical systems.

This sealant is suited for use on residential and commercial mechanical systems where a flexible, durable seal is required. Its compatibility with glass, metal, and plastic makes it a versatile choice for sealing access panels, pipe penetrations, housing joints, and custom gasket fabrication in the field. It meets food-safe standards under 21 CFR 177.2600, expanding its applicability to food processing and food-contact equipment environments where approved materials are required by code or inspection.

Key Features

• RTV silicone chemistry cures at room temperature without heat or UV exposure
• Tack-free in 20 minutes, full cure in 24 hours for fast return to service
• Operating range of -76.0 degrees F to 356.0 degrees F (-60.0 degrees C to 180.0 degrees C)
• Adheres to glass, metal, and plastic substrates
• Food safe per 21 CFR 177.2600 and meets MIL-A-46106 military specification
• Black color for visual identification on dark or painted surfaces

Compatibility

Designed for use as a joint sealant and formed-in-place gasket material on glass, metal, and plastic surfaces. Part of the DOW CORNING 732 series (series part number 732-Black).

Installation Notes

This product is typically applied by HVAC technicians, plumbers, or maintenance mechanics using a standard caulking gun compatible with 10.1 oz cartridges. Surfaces should be clean, dry, and free of oil or loose debris before application. Allow the full 24-hour cure time before exposing the joint to fluids, pressure, or thermal cycling. Consult applicable codes such as the IFGC or IPC for sealant use requirements on gas or plumbing system joints.