Dow Corning 99180523 Rtv Silicone Joint Sealant 10.1 Oz

Product Description

The DOW CORNING 99180523 is an RTV silicone joint sealant supplied in a 10.1 oz cartridge. It cures to a flexible, durable bead that resists moisture, UV exposure, and temperature extremes ranging from -67 degrees F to 300 degrees F. The black color suits applications where a clean, finished appearance is needed against dark substrates. HVAC technicians, plumbers, and general contractors use this sealant to seal joints, penetrations, and gaps in a wide range of residential and commercial settings. It dispenses through a standard caulk gun and reaches a tack-free state in 90 minutes under typical conditions.

This sealant is suited for both indoor and outdoor use across multiple trades and applications. Common uses include sealing HVAC duct penetrations, gutters, insulating joints, marine fittings, patio and driveway cracks, and sidewalk joints. It adheres directly to concrete, glass, masonry, metal, plastic, and rubber without a primer in most cases, making it a versatile option when a single sealant needs to handle varied substrate combinations on the same job.

Key Features

• RTV silicone chemistry provides long-term flexibility and weather resistance
• Operating temperature range of -67 degrees F to 300 degrees F suits high-heat and cold-weather installs
• 90-minute tack-free dry time allows same-day service continuity
• Bonds to concrete, glass, masonry, metal, plastic, and rubber
• 10.1 oz cartridge is compatible with standard-size caulk guns
• Black color blends with dark substrates in gutters, driveways, and marine applications

Compatibility

Designed for use on concrete, glass, masonry, metal, plastic, and rubber substrates across driveway, gutter, insulating, marine, patio, and sidewalk applications.

Installation Notes

Load the cartridge into a standard caulk gun and cut the nozzle tip to the desired bead width before applying. Clean and dry all substrate surfaces thoroughly before dispensing to ensure proper adhesion. Allow adequate ventilation during application, as RTV silicone releases acetic acid while curing. Do not apply over wet surfaces or expose the uncured bead to standing water before tack-free time has elapsed.