Loctite Copper Anti-Seize Lubricant 1 lb Brushtop Bottle — High-Temp Conductive Paste to Prevent Corrosion & Galling

Loctite Copper Anti-Seize Lubricant in a 1 lb brushtop bottle is a high-temperature copper-based paste that prevents corrosion, galling, and seizure on threaded and electrical metal connections.

Designed for professional mechanics and serious DIYers, this Loctite formula is engineered to work across a wide temperature range and on a variety of metals. It’s commonly used in automotive, industrial, and maintenance settings where fasteners, spark plugs, or electrical terminals face heat, moisture, and corrosive environments. The brushtop bottle makes application controlled and clean, so technicians can apply the lubricant directly to threads or precise surfaces without wasting product.

How does this anti-seize protect fasteners under extreme heat?

The copper particles and high-temperature carrier create a barrier that resists metal-to-metal bonding when components expand and contract. It remains intact between -30°F and 1800°F, helping prevent galling and seizure during operation and disassembly.

• Contains conductive copper solids for high-temperature stability
• Prevents cold welding and galling on threaded joints and fittings
• Resists breakdown across a wide thermal range (-30°F to 1800°F)

Can I use it on different metals and plated surfaces?

Yes — this Loctite copper anti-seize is formulated to work on a variety of substrates, including stainless steel, aluminum, and plated parts, without compromising plated finishes when used as directed. It’s suitable for mixed-metal assemblies where dissimilar metals might otherwise corrode or seize together.

• Safe for stainless steel, aluminum, zinc- and nickel-plated surfaces
• Reduces galvanic corrosion between dissimilar metals
• Recommended for assemblies where future disassembly is expected

Is it appropriate for electrical and spark plug applications?

Loctite Copper Anti-Seize enhances electrical conductivity at threaded connections and terminals while reducing resistance that can cause voltage drop or interference. Use sparingly on spark plug threads and electrical joints to maintain reliable contact without insulating the connection.

• Improves electrical continuity at threaded joints and terminals
• Helps reduce voltage drops across connections
• Commonly applied to spark plug threads and battery terminal bolts

How do I apply it and what should I avoid?

Apply a thin, even coat from the brushtop bottle directly to clean threads or contact surfaces. Avoid overapplication near sensitive seals or brake components and do not substitute for lubricant where specific grease or sealant is required.

• Brush a light layer onto clean, dry threads or surfaces
• Wipe away excess and avoid contaminating brake or friction surfaces
• Store bottle upright and cap tightly after use to preserve consistency

Who is this for: This 1 lb brushtop bottle of Loctite Copper Anti-Seize is intended for mechanics, fleet technicians, industrial maintenance teams, and dedicated DIY enthusiasts who need reliable, high-temperature protection for fasteners and electrical connections. It’s ideal when you require a durable, conductive anti-seize that supports repeat disassembly and long-term corrosion resistance in demanding environments.