Threading a suppressor or muzzle device directly onto a hot barrel without the right compound is a recipe for galled, seized threads. The job needs a high-temperature anti-seize that survives the heat at the muzzle and still lets you remove the can later. Here’s a guide to the best types of anti-seize for suppressor threads and how to use them.
Best overall: nickel-based anti-seize
Nickel anti-seize is the go-to for barrel and suppressor threads because it handles extreme heat. Products like Loctite LB 771 are rated to around 2400°F, and Permatex Nickel Anti-Seize (77124) is widely used by shooters. A tiny dab goes a long way — it prevents galling while still allowing removal.
Cleaner alternative: graphite-based compounds
If you want something less messy than nickel, graphite-based high-temp compounds such as Loctite 8036 (white graphite, ~2000°F) or Loctite 8070 work well on muzzle threads. Some shooters also use a food-grade high-temp anti-seize, which is far less messy than the black/silver nickel pastes.
For a semi-permanent mount: Rocksett
Rocksett isn’t an anti-seize — it’s a high-temperature ceramic adhesive (good to roughly 1800°F) used to keep a direct-thread can or muzzle device from backing off. It bonds firmly but is water-soluble, so soaking the joint in water releases it. Choose this only if you want a fixed mount; for a suppressor you’ll swap between guns, stick with anti-seize.
How to choose and apply
- Removable suppressor/brake: use a high-temp nickel (or graphite) anti-seize so it comes off later.
- Permanent-ish mount that won’t loosen: use Rocksett (remembering it releases with water).
- Apply sparingly to clean, dry threads — a thin film is all you need; wipe away excess.
- Always follow your suppressor and firearm manufacturer’s mounting and torque instructions, and confirm the product’s temperature rating suits your setup.
Note: follow all applicable laws and manufacturer guidance regarding suppressors and firearm maintenance.