Fenwick's Copper Anti-Seize – Anti-Corrosion Compound for Threaded & Titanium Components

Fenwick's Copper Anti-Seize is a copper-based anti-seize compound that protects threaded and interference-fit components from corrosion, galling, and seizing — ensuring that every bolt you fit today can be removed cleanly in the future. It's the copper-based counterpart to the Fenwick's PTFE Anti-Seize, sharing the same core purpose but using copper particles as the primary anti-galling agent rather than PTFE. Copper anti-seize is a workshop staple with a long track record in both cycling and automotive maintenance, particularly valued for its performance under high temperatures and pressure.

The compound is particularly effective at titanium-to-titanium and titanium-to-aluminium interfaces, where galling — the cold-welding of metal surfaces under pressure — is a well-known and costly problem. A thin application to titanium bolt threads before fitting prevents galling entirely. It's equally valuable on steel and aluminium threaded interfaces in high-corrosion areas: bottom bracket threads, pedal threads, seatpost clamp bolts, stem bolts, and any fastener exposed to water and road salt. The packaging allows precise application without a grease gun, making it practical for both workshop and home mechanic use. Like the PTFE version, it can also be applied as a thin smear behind disc brake pads to dampen vibration and reduce brake squeal — but must be kept completely away from the rotor and pad friction surface.

Browse the full Fenwick's range or explore our workshop and maintenance collection for complementary products including the PTFE Anti-Seize for applications where a PTFE-based compound is preferred.

What It's Good For

• Preventing corrosion and seizing on threaded components — bottom brackets, pedal threads, seatpost clamps, stem bolts
• Preventing galling at titanium-to-titanium and titanium-to-aluminium interfaces
• High-temperature and high-pressure applications where copper anti-seize excels
• Thin application behind disc brake pads to reduce brake squeal
• Precise application without a grease gun — practical for workshop and home use
• Long-lasting protection on components that are infrequently removed

What It's NOT Good For

• Braking surfaces — never apply to rotors or the friction face of brake pads; this will severely impair braking performance and is a safety hazard
• Carbon fibre components — use a dedicated carbon assembly paste instead, which provides grip rather than slip
• General-purpose lubrication of moving parts such as chains, cables, or pivot points — use a dedicated lubricant for these
• Applications where copper contamination is a concern — the PTFE Anti-Seize is the copper-free alternative

Frequently Asked Questions

What is the difference between Copper Anti-Seize and PTFE Anti-Seize?
Both products protect threaded and interference-fit components from corrosion and galling. The key difference is the anti-galling agent: Copper Anti-Seize uses copper particles, which excel under high temperatures and pressure. The PTFE Anti-Seize uses PTFE (polytetrafluoroethylene), which provides a dry lubricating layer and is preferred where copper contamination is a concern. Both are suitable for titanium interfaces and disc brake pad backing plates.

Why do titanium components need anti-seize?
Titanium is prone to galling — a form of cold-welding where metal surfaces bond under pressure and friction. This can make titanium bolts effectively impossible to remove without damage. Applying anti-seize to titanium threads before fitting prevents galling entirely and ensures the bolt can always be removed cleanly.

How do I use it behind disc brake pads?
Apply a very thin smear to the metal backing plate of the brake pad only — the side that contacts the caliper piston, not the friction material. Keep the compound completely away from the rotor and the pad's friction surface. Even a small amount of contamination on the braking surface will significantly reduce braking performance and require the pads to be replaced.

Which threaded components benefit most from anti-seize?
Any threaded interface exposed to water, road salt, or dissimilar metals benefits from anti-seize. The most common applications on a bike are: bottom bracket threads, pedal threads, seatpost clamp bolts, stem bolts, and any stainless or titanium bolt threaded into an aluminium component.