Loctite LOC59630 Red High Temp Rtv Silicone Sealant

Product Description

The LOCTITE LOC59630 is a general-purpose, one-part RTV silicone adhesive sealant formulated for high-temperature applications. It cures at room temperature to form a tough, flexible rubber seal that resists heat, vibration, and moisture. Designed for use across HVAC, plumbing, electrical, and general mechanical service work, this red silicone sealant is the go-to choice for licensed tradespeople who need a reliable, durable seal in demanding environments. The red color indicates high-temperature suitability, making it appropriate for flues, vents, and exhaust-adjacent assemblies.

This sealant is suited for both residential and light commercial applications. Typical uses include sealing ductwork joints, vent connections, flue penetrations, and door or window perimeters where a flexible, heat-resistant seal is required. It also performs well for protecting electrical leads from mechanical shock and providing basic electrical insulation around low-voltage connections. HVAC technicians, plumbers, and electricians routinely use this product during installation and service calls.

Key Features

• One-part RTV formula cures at room temperature without mixing or heat activation
• Red color indicates high-temperature resistance suitable for flues, vents, and exhaust areas
• Forms a tough, flexible rubber seal that handles vibration and thermal cycling
• Provides electrical insulation and protects leads from mechanical shock
• General-purpose adhesion to common substrates including metal, glass, and rigid plastics
• Suitable for sealing ductwork, vents, flues, doors, windows, and trim

Compatibility

Designed as a general-purpose RTV silicone sealant for use on metal, glass, and similar substrates in HVAC, plumbing, and electrical applications where a flexible, high-temperature-rated seal is required.

Installation Notes

This product is installed by licensed HVAC technicians, plumbers, and electricians as part of sealing and weatherproofing work. Before applying, ensure all surfaces are clean, dry, and free of grease, dust, or old sealant. Allow full cure time at room temperature before exposing the seal to heat or pressure. Refer to applicable codes such as the IFGC or IMC when using this sealant on flue or vent connections to confirm it meets the required temperature rating for the specific installation.

Technical Specifications

• Weight: 0.273 pounds
• Color: Red
• Cure Method: Room temperature cure (RTV)
• Components: One-part
• UPC: 079340596307
• Unit of Measure: Each

Standard Information

• Brand: LOCTITE
• Manufacturer Part Number: LOC59630