Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker 81878, 3 oz Tube

Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, Part Number 81878, is designed to create reliable, leak-resistant formed-in-place gaskets for demanding automotive and mechanical applications. Its high-temperature silicone formula withstands continuous exposure to elevated temperatures and helps seal against oil, water, antifreeze, and other common automotive fluids. The 3 oz tube provides a convenient format for repairs, maintenance, and gasket replacement projects.
The copper-colored RTV compound is suitable for applications that require strong adhesion and dependable flexibility after curing. It can be used on many stamped and cast metal components, including valve covers, oil pans, timing covers, thermostat housings, water pumps, and exhaust-related components where an appropriate high-temperature sealant is required. Always follow the vehicle or equipment manufacturer’s surface preparation and curing recommendations before returning the assembly to service.
Feature: Maximum-temperature RTV silicone formula for demanding sealing applications. Feature: Forms a flexible, leak-resistant gasket that helps compensate for irregular or machined surfaces. Feature: Resists common automotive fluids, including oil, water, and antifreeze. Feature: Copper-colored compound helps identify the applied sealant bead. Feature: Convenient 3 oz tube for automotive repairs and maintenance. Feature: Carded packaging supports organized retail display and storage. Feature: Not air restricted and not designated for truck freight only. Permatex Part Number 81878 delivers a practical sealing solution for automotive technicians, repair professionals, and experienced do-it-yourself users seeking durable gasket-making performance.

Features:

• Maximum-temperature RTV silicone formula for demanding sealing applications

• Forms a flexible, leak-resistant gasket that helps compensate for irregular or machined surfaces

• Resists common automotive fluids, including oil, water, and antifreeze

• Copper-colored compound helps identify the applied sealant bead

• Convenient 3 oz tube for automotive repairs and maintenance

• Carded packaging supports organized retail display and storage

• Not air restricted and not designated for truck freight only