Permatex Copper Anti-Seize Lubricant 8 oz — High‑Temp Protection to 1800°F, Corrosion & Galling Prevention

Permatex Copper Anti-Seize Lubricant is a high‑temperature, copper‑flake paste designed to prevent seizing, corrosion and galling on threaded and metal mating surfaces up to 1800°F.

When working on engines, exhaust systems or any fasteners exposed to extreme heat and corrosive environments, a dedicated anti‑seize keeps parts serviceable and reduces the risk of damaging threads during disassembly. Permatex’s formula combines micro‑fine copper flakes in a semi‑synthetic grease carrier with rust inhibitors to deliver both heat tolerance and long‑term protection across automotive, industrial and marine applications.

How does this lubricant handle extreme temperatures and heat cycling?

Permatex Copper Anti‑Seize is engineered to remain stable from -30°F to 1800°F, making it suitable for components that see repeated high‑temperature exposure. The copper flakes maintain conductivity and help dissipate heat while the grease carrier resists drying out under thermal cycling.

• Works across a wide temperature span: -30°F to 1800°F.
• Copper flakes improve heat tolerance and electrical conductivity.
• Semi‑synthetic carrier reduces degradation during repeated heating.

Where should I apply Permatex Copper Anti‑Seize on a vehicle or machine?

Use it on threaded parts and fittings that are likely to corrode, gall or seize under heat and load. It’s commonly applied to spark plug threads, exhaust manifold bolts and sensor fittings where future removal must be predictable and damage‑free.

• Spark plug threads in aluminum heads to prevent thread galling.
• Exhaust manifold and engine bolts exposed to high heat.
• Oxygen sensors, knock sensors and thermostat housing bolts for easier servicing.
• Battery cable connections and fuel filter fittings for corrosion resistance.

Will using copper anti‑seize affect sensors or electrical connections?

When applied appropriately, Permatex Copper Anti‑Seize provides good electrical conductivity and can be used on many sensor threads and battery connections. Avoid contaminating sensor faces or electrical contact surfaces beyond the threaded area to prevent interference.

• Maintains electrical conductivity on threaded connections.
• Do not coat sensor tips or sealing surfaces—apply only to threads.
• Wipe excess product away from mating sealing faces for reliable seals.

How much should I use and how do I prepare the surface?

Clean mating surfaces of heavy grease, dirt and old sealant before applying a thin, even coat of anti‑seize to threads or contact faces. A light, uniform layer prevents over‑torquing and provides the protection needed without excess product squeezing into unwanted areas.

• Remove dirt, rust and old compound before application for best adherence.
• Apply a thin coating to threads and the first few engaged turns only.
• Use a brush or applicator for controlled, mess‑free coverage.

Who is this for: Mechanics, home DIYers, fleet maintenance crews and industrial technicians who need a reliable anti‑seize that withstands high temperatures and prevents thread damage will benefit from Permatex Copper Anti‑Seize. It’s especially useful when working with aluminum heads, exhaust components, sensors and any fasteners exposed to heat, corrosion or frequent servicing. Choose the 8 oz. size for a balance of workshop convenience and multiple uses on routine maintenance and repair jobs.