Dow Corning 99180620 Rtv Silicone Joint Sealant 10.1 Oz

Product Description

The DOW CORNING 99180620 is an RTV silicone joint sealant supplied in a 10.1 oz cartridge. It cures at room temperature to form a flexible, durable seal rated for continuous service from -67 degrees F to 300 degrees F. The gray color blends with concrete and metal substrates common in mechanical and structural applications. A tack-free dry time of 90 minutes allows for relatively fast return to service in most conditions. Plumbers, HVAC technicians, and general contractors use this sealant for floor joints, gutter sealing, insulating applications, and marine environments where moisture and temperature cycling demand a resilient seal.

This sealant is suited for both residential and light commercial applications. It bonds to a wide range of substrates including concrete, glass, masonry, metal, plastic, and rubber, making it versatile across mechanical room installations, rooftop equipment curbs, gutter systems, and below-deck marine joints. The cartridge format is compatible with standard 10 oz caulking guns, which are standard issue on most trade job sites.

Key Features

• RTV silicone formulation cures at room temperature without heat or mixing
• Operating range of -67 degrees F to 300 degrees F suits extreme-temperature installations
• Tack-free in 90 minutes, reducing downtime between application and adjacent work
• Adheres to concrete, glass, masonry, metal, plastic, and rubber
• 10.1 oz cartridge fits standard caulking guns used in the field
• Gray color blends with common mechanical and structural surfaces

Compatibility

Designed as an OEM-style replacement and general-purpose sealant for floor, gutter, insulating, and marine joint applications where RTV silicone adhesion to concrete, glass, masonry, metal, plastic, or rubber is required.

Installation Notes

Surface must be clean, dry, and free of oil or loose material before application. Cut the cartridge tip at a 45-degree angle and load into a standard caulk gun for controlled bead placement. Allow the sealant to fully cure before exposing the joint to water or mechanical stress. Follow applicable building or mechanical codes for joint sealant use in occupied or pressurized spaces.