Loctite LOC270639 Rtv Silicone Sealant 10.3 Oz Blue

Product Description

The LOCTITE LOC270639 is a high-temperature RTV silicone sealant packaged in a 10.3 oz cartridge. RTV (room temperature vulcanizing) silicone cures on contact with atmospheric moisture to form a flexible, durable seal rated for elevated heat service. This blue-pigmented formulation is designed for use in HVAC, plumbing, and mechanical applications where joints, seams, and penetrations must maintain a reliable seal under sustained thermal cycling. Licensed HVAC technicians and plumbers use this product for sealing flanges, gaskets, housings, and ductwork connections where heat resistance is required.

This sealant is suited for both residential and light commercial applications. Typical uses include sealing heat exchanger access panels, exhaust flue connections, appliance housings, and high-heat pipe penetrations. The 10.3 oz cartridge is compatible with a standard caulk gun, making it practical for field service and shop work alike. The blue color aids identification and inspection after application, distinguishing it from other sealant types on the job.

Key Features

• High-temperature RTV silicone formulation for heat-intensive service environments
• Room temperature vulcanizing cure — no oven or heat source required to set
• Blue pigment for easy post-application inspection and product identification
• 10.3 oz cartridge fits standard caulking guns
• Flexible cured bead accommodates thermal expansion and contraction

Compatibility

Designed as an OEM-style sealant for use in high-temperature HVAC, plumbing, and mechanical system applications requiring a heat-resistant RTV silicone.

Installation Notes

Applied by licensed HVAC technicians, plumbers, or qualified mechanical contractors. Power down and allow equipment to cool fully before applying sealant to any surface near heat sources or energized components. Clean and dry all mating surfaces before application to ensure proper adhesion and cure. Allow adequate cure time per manufacturer guidance before returning the system to service.

Technical Specifications

• Product Type: High-Temperature RTV Silicone Sealant
• Color: Blue
• Net Volume: 10.3 oz
• Package Weight: 0.081 pounds
• Unit of Measure: Each
• UPC: 079340305337

Standard Information

• Brand: LOCTITE
• Manufacturer Part Number: LOC270639