Permatex Copper Anti-Seize Lubricant — 8 oz. jar, high-temperature protection for bolts & spark plugs

Permatex 09128 Copper Anti-Seize Lubricant is a high-temperature, copper-based paste designed to prevent galling, seizing and corrosion on threaded and mated metal parts.

Used by mechanics, fabricators and maintenance professionals, this 8 oz. jar of copper anti-seize provides a durable barrier that helps parts separate cleanly after exposure to heat, pressure and corrosive environments. It’s formulated for metal-to-metal contact points like spark plug threads, bolts, studs and exhaust components where disassembly is anticipated years after installation.

What exactly does this copper anti-seize do for threaded fasteners?

It creates a thin, lubricating film that minimizes metal-to-metal contact and reduces friction during tightening and removal. The copper solids carry load and maintain conductivity where needed, while the carrier helps the paste stay in place under vibration.

• Reduces galling and thread damage when installing or removing fasteners
• Helps prevent corrosion and seizure in high-heat areas
• Maintains a lubricating layer under pressure and vibration

How hot can this Permatex formula handle, and where should I use it?

The copper-based compound is engineered for high-temperature service, suitable for exhaust systems, manifolds, and other hot assemblies. It also performs well for general maintenance on bolts, studs and flanges that see repeated service or harsh environments.

• Suitable for exhaust, turbo, and manifold fasteners
• Use on spark plug threads to ease removal
• Ideal for bolts exposed to salt, moisture or outdoor conditions

How do I apply and how much should I use?

Apply a thin, even coating to the threaded area or mating surface; you only need enough to cover the contact zone without excessive buildup. Over-application can attract dirt or affect torque readings, so wipe away surplus before final assembly.

• Spread with a brush or cloth for even coverage
• Use sparingly on threads and contact faces
• Wipe excess to maintain correct torque and cleanliness

Will this affect torque specs or electrical conductivity?

The paste can slightly alter torque readings if applied in thick layers, so keep application minimal for torque-critical fasteners. Because it contains metallic copper, it can preserve electrical conductivity on contacts where conductivity is required, but avoid using where precise electrical isolation is needed.

• Thin films have minimal impact on torque values
• Copper solids can carry current—suitable for conductive joints
• Not recommended where electrical insulation is required

Who is this for: Professionals and DIYers who need a dependable lubricant for high-heat, corrosive, or hard-to-service metal assemblies. If you work on engines, exhausts, outdoor equipment or any application where fasteners must be removed years later without damage, Permatex 09128 Copper Anti-Seize Lubricant in the 8 oz. size is formulated to help those connections stay serviceable while resisting heat and corrosion.