Permatex Copper Anti-Seize Lubricant — 1 lb tub, high-temp protection to 1800°F, corrosion-resistant

Permatex 31163 Copper Anti-Seize Lubricant is a heavy-duty, copper-based paste designed to prevent seizing, galling and corrosion on threaded and high-temperature metal joints.

This 1 lb tub of Permatex copper anti-seize is formulated for automotive, industrial and marine use where metal parts are exposed to heat, moisture and corrosive conditions. The paste combines metallic copper solids with rust and corrosion inhibitors to maintain serviceable fasteners and improve disassembly after prolonged exposure to heat. It also offers electrical conductivity where needed and performs across a wide temperature range, making it a versatile maintenance product for shops and home garages.

How does this anti-seize protect fasteners in high-temperature environments?

The copper solids act as a barrier between mating metal surfaces, preventing metal-to-metal cold welding and galling at elevated temperatures. Corrosion inhibitors in the formulation inhibit rust formation, so bolts and threaded parts remain removable even after extended heat exposure.

• Effective from -30°F to 1800°F for thermal stability
• Copper particles provide a lubricating metal layer under load
• Added inhibitors reduce oxidation and rust buildup on threads

Where should I apply Permatex 31163 in an engine or vehicle?

Apply a light, even coat on threads and contact faces that see heat, moisture or corrosive exposure. Typical use cases include spark plugs in aluminum heads, exhaust manifold bolts, oxygen sensor threads and other high-temperature fasteners.

• Spark plug threads installed in aluminum for easier removal
• Exhaust manifold and engine bolts to prevent galling
• Oxygen and knock sensor threads where heat and corrosion occur

Will this lubricant affect electrical connections or sensors?

Permatex copper anti-seize provides good electrical conductivity, so it can be used on certain electrical connections where conductive contact is required. Use it sparingly and only on specified sensor threads or battery cable connections, following manufacturer guidance to avoid interference with sensor performance.

• Good electrical conductivity for battery cable connections
• Suitable for sensor threads when manufacturer allows conductive anti-seize
• Apply minimal quantity to ensure reliable electrical contact

How should I apply and store the product for best results?

Clean mating surfaces to remove dirt, oil and old sealants before application. Use a brush or gloved finger to apply a thin, consistent layer; avoid excess that could contaminate nearby components. Store the tub tightly sealed, away from extreme cold or heat when not in use.

• Clean threads and seating surfaces before application
• Apply a thin, uniform coat; remove excess to prevent contamination
• Keep container closed and stored in a cool, dry place between uses

Who this is for: Permatex 31163 is aimed at professional mechanics, DIY automotive enthusiasts, fleet maintenance teams and industrial technicians who need a reliable anti-seize for high-temperature bolts, sensor threads and electrical grounding points. If you work on engines, exhaust systems, or anywhere threaded fasteners face heat and corrosion, this 1 lb tub delivers a durable, conductive copper barrier to ease assembly and disassembly while protecting components over time.