Loctite LOC30542 Copper Rtv Silicone Sealant 70ml

Product Description

The LOCTITE LOC30542 is a copper-colored, high-temperature RTV silicone sealant designed for forming gaskets and sealing flanged joints in demanding service environments. RTV (room-temperature vulcanizing) silicone cures on exposure to atmospheric moisture, producing a flexible, oil-resistant seal that withstands extreme heat cycles. This product ships in a 70 mL tube and is sold individually. It is a go-to sealant for HVAC technicians, automotive service professionals, and plumbers who need a reliable formed-in-place gasket where a conventional cut gasket is not practical or available.

This sealant is commonly applied to exhaust manifolds, oil pans, valve covers, water pumps, thermostats, and other high-heat metal flange assemblies. In HVAC and mechanical systems, it is used for sealing ductwork connections, flue components, and equipment housings where standard silicone formulations may not hold up to sustained elevated temperatures. The copper pigment also serves as a visual indicator of bead coverage during assembly.

Key Features

• Copper RTV silicone formulation rated for high-temperature flange and gasket sealing
• Room-temperature vulcanizing cure — no oven or heat required to set
• Flexible cured seal resists vibration, thermal cycling, and oil exposure
• 70 mL tube format for controlled bead application
• Copper pigment provides clear visual confirmation of bead placement and coverage

Compatibility

Designed as an OEM-style formed-in-place gasket sealant for metal flange surfaces in high-temperature mechanical, HVAC, and plumbing applications.

Installation Notes

Applied by a licensed HVAC technician, plumber, or qualified mechanic depending on the application. Before applying, shut down the system, allow all components to cool fully, and clean mating surfaces of oil, grease, and old sealant material to ensure proper adhesion. Apply a continuous, even bead to one flange surface, assemble the joint, and allow the sealant to cure fully before returning the system to service. Follow manufacturer cure time guidance and applicable codes such as the IFGC or IPC where the sealant is used in gas or plumbing service.

Technical Specifications

• Product Series: 5920 Copper RTV
• Net Volume: 70 mL
• Package Format: Tube with cap/gun compatible
• UPC: 079340305427
• Unit of Measure: Each
• Minimum Order Quantity: 12

Standard Information

• Brand: LOCTITE
• Manufacturer Part Number: LOC30542