Best Anti Seize for Spark Plugs (2026): 5 Picks for the Garage
5 copper anti-seize greases for spark plug threads, compared by temperature range, size and applicator.
On this page
Top picks at a glance
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- 1
Best OverallKeze Copper Anti-Seize9.5/10View on Amazon - 2
Best Value Large BottleBTAS Anti-Seize 8 oz9.5/10View on Amazon - 3
Best Known BrandPermatex Anti-Seize9.5/10View on Amazon - 4
Best Small PackBTAS Anti-Seize 2-Pack9.4/10View on Amazon
A spark plug that will not budge turns a simple plug change into a long afternoon with a breaker bar. The best anti seize for spark plugs is a copper-based grease brushed thinly onto the plug threads so the plug comes out cleanly at the next change. This guide compares 5 copper and blended anti-seize greases by temperature range, size, applicator and what each listing states about use.
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Quick picks
- Best Overall Keze Copper Anti-Seize: 8 oz bottle with a brush, -30°F to 1800°F, for spark plug threads, brakes and exhaust studs. Check price on Amazon
- Best Value Large Bottle BTAS Anti-Seize 8 oz: 8 oz of the same copper formula as the small tubes, -30°F to 1800°F, for plug threads and exhaust bolts. Check price on Amazon
- Best Known Brand Permatex Anti-Seize: 4 oz brush-top bottle, aluminum, copper and graphite blend, -60°F to 1600°F, for spark plugs and head bolts. Check price on Amazon
- Best Small Pack BTAS Anti-Seize 2-Pack: 1 oz tubes, 2 in the pack, -30°F to 1800°F, for plug threads, hub nuts and exhaust bolts. Check price on Amazon
Picks for the garage
Keze Anti Seize Lubricant Copper Grease High Temp
An 8 oz bottle of copper anti-seize grease with a brush, rated -30°F to 1800°F, for spark plug threads, brakes, exhaust studs and lawnmower parts.
Pros
- 8 oz bottle with a brush for easy application
- -30°F to 1800°F temperature range
- Copper, lithium composite and petroleum distillates blend
- Stated for spark plugs, brakes, exhaust studs and more
Cons
- No warranty term is stated
- No shelf life is stated
- No electrical conductivity stated, unlike the BTAS picks
- No weight is stated
BTAS Copper Antiseize Grease,Bolt/Spark/Glow Plug
An 8 oz bottle of semi-synthetic copper anti-seize grease, rated -30°F to 1800°F, for spark plug threads, exhaust bolts and engine bolts.
Pros
- 8 oz bottle, the joint largest here
- -30°F to 1800°F temperature range
- Micro copper flakes with rust and corrosion inhibitors
- Excellent electrical conductivity, per the listing
Cons
- No warranty term is stated
- No brush or applicator is stated
- Identical listing copy to the 1 oz 2-pack
- No shelf life is stated
Permatex 80071 Anti-Seize Lubricant with Brush Top
A 4 oz brush-top bottle of anti-seize lubricant blending aluminum, copper and graphite, rated -60°F to 1600°F, for spark plugs and head bolts.
Pros
- Brush-top bottle for easy application
- Aluminum, copper and graphite blend
- Salt, corrosion and moisture resistant
- Stated for spark plugs and cylinder head bolts
Cons
- 1600°F top end, lower than the 1800°F picks
- Warranty described but no term stated
- 4 oz, smaller than the 8 oz bottles
- No stated electrical conductivity
BTAS Anti Seize Lubricant with Copper in It
A 2-pack of 1 oz tubes of semi-synthetic copper anti-seize grease, rated -30°F to 1800°F, for spark plug threads and exhaust bolts.
Pros
- 2 tubes, 1 oz each, for small jobs
- -30°F to 1800°F temperature range
- Micro copper flakes with rust and corrosion inhibitors
- Thin film application, wipe away excess
Cons
- No warranty term is stated
- No brush or applicator is stated
- Identical listing copy to the 8 oz bottle
- No shelf life is stated
ZDBB Copper Anti Seize Thread Lubricant High Temp
A 1 oz tube of copper anti-seize grease with a brush, rated -30°F to 1800°F, for spark plugs, brakes and exhaust bolts.
Pros
- Brush included for thin, even application
- -30°F to 1800°F temperature range
- Copper-based barrier against corrosion and oxidation
- Stated for spark plugs, brakes and exhaust systems
Cons
- No warranty term is stated
- 1 oz total, the least product here
- Do not mix with other lubricants, per the listing
- No shelf life is stated
Compared on paper
| Model | Shop Score | Size | Temp range | Base | Applicator | Warranty |
|---|---|---|---|---|---|---|
| Keze Copper Anti-Seize | 9.5/10 | 8 oz | -30°F to 1800°F | Copper, lithium composite | Bottle brush | Not stated |
| BTAS Anti-Seize 8 oz | 9.5/10 | 8 oz | -30°F to 1800°F | Copper flakes, semi-synthetic | Not stated | Not stated |
| Permatex Anti-Seize | 9.5/10 | 4 oz | -60°F to 1600°F | Aluminum, copper, graphite | Brush-top bottle | Not stated |
| BTAS Anti-Seize 2-Pack | 9.4/10 | 1 oz x 2 | -30°F to 1800°F | Copper flakes, semi-synthetic | Not stated | Not stated |
| ZDBB Copper Anti-Seize | 9.4/10 | 1 oz | -30°F to 1800°F | Copper-based | Brush | Not stated |
Specifications are manufacturer rated, as published on each listing and collected 2 November 2026.
How the points were given
Each anti-seize is scored on performance, build, value, safety and warranty, with the weights published on our How We Pick page. None states a UL, ETL or CSA listing, so all score zero on safety, and none states a warranty term.
| Product | Shop Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Keze Copper Anti-Seize | 9.5 | 30 | 21 | 21 | 0 | 0 |
| BTAS Anti-Seize 8 oz | 9.5 | 30 | 21 | 20 | 0 | 0 |
| Permatex Anti-Seize | 9.5 | 29 | 21 | 20 | 0 | 0 |
| BTAS Anti-Seize 2-Pack | 9.4 | 28 | 20 | 20 | 0 | 0 |
| ZDBB Copper Anti-Seize | 9.4 | 28 | 20 | 19 | 0 | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
What the listings tell you
5 anti-seize listings were read. All 5 state a temperature range, 4 are copper-based, and none states a warranty term or a safety listing. The 2 BTAS listings share the same formula across 2 sizes: the 1 oz 2-pack and the 8 oz bottle list identical bullets. The Permatex listing mentions a manufacturer warranty but states no term.
Buying guide: choosing the best anti seize for spark plugs
Copper or aluminum
4 of the 5 picks here are copper-based; the Permatex pick blends aluminum, copper and graphite. The listings state copper for high-heat thread protection, and the Permatex listing states its blend for spark plugs, cylinder head bolts and exhaust head bolts.
Temperature range
All 5 picks state a high-temperature range: -30°F to 1800°F on the Keze, BTAS and ZDBB listings, and -60°F to 1600°F on the Permatex listing. Match the range to the job.
Brush or tube
Keze, ZDBB and Permatex come with a brush or brush-top bottle; the BTAS picks state a thin film applied by hand. The BTAS listings state applying the product to the surface and wiping away excess, since only a neat, thin film is needed.
Size: 1 oz or 8 oz
BTAS and ZDBB sell 1 oz sizes for occasional plug changes; Keze and BTAS sell 8 oz bottles for a shop shelf. The Permatex pick is a 4 oz brush-top bottle. Pick the size that matches how often the plugs come out.
What it will not do
Anti-seize prevents seizing, corrosion and galling on threads; it is a lubricant, not a thread repair. A stripped plug hole needs a repair kit, not grease. For stripped holes, see our thread repair kit for spark plugs.
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FAQ: garage tools
What is anti seize grease?
Anti-seize grease is a lubricant, usually copper-based, that goes on metal threads to prevent seizing, corrosion and galling. The listings here describe blends of copper powder or flakes with lithium composite, petroleum distillates or semi-synthetic grease, and state uses on spark plug threads, lug nuts, brake parts and exhaust studs.
How much anti seize on spark plugs?
A thin film only. The BTAS listings state that only a neat, thin film is needed to achieve optimal results, and the ZDBB listing states to apply a thin layer for reliable protection. Wipe away any excess before the plug goes in.
How to use anti seize on spark plugs?
Remove excess dirt and grease from the surfaces to be coated, apply the product to the plug threads, and wipe away any excess. The ZDBB listing adds a warning: do not mix it with other lubricants. Follow the instructions on the listing for the product in hand.
Is anti seize needed for spark plugs?
The listings describe it as protection against seizing, corrosion and galling, for easier disassembly at the next plug change. Permatex states its pick is for easy removal of spark plugs. Whether a given plug needs it is a call for the plug and vehicle manuals.
Related: types of spark plugs, spark plug problems, dielectric grease vs anti seize, anti seize vs thread locker and ceramic vs copper anti seize.
