You turn a bolt that has lived through five winters, and it snaps instead of turning. The threads are welded by rust, the exhaust stud comes out in pieces, and a ten-minute job becomes a drilled-out, re-tapped afternoon.
Anti-seize compound is the cheap insurance against that afternoon — a paste of metal flakes in grease that keeps threads apart, stops galling, and lets a fastener come out years later. But copper, nickel, silver and graphite blends are not interchangeable, and the wrong one on the wrong metal makes things worse.
This guide compares the alternative methods honestly — copper, nickel and silver blends, plus the dry-film and tape methods that replace paste altogether — and names the five compounds worth buying, so you match the paste to the metal, the heat, and the job. For the torque side of the work, our multimeter guide explains how fastener torque is actually measured. For the pedal feel that tells you the job worked, see our brake pedal feel guide.
The 30-second answer
Buy the Permatex 80078 Anti-Seize Lubricant, 8 oz for the best all-round anti-seize here: a refined blend of aluminium, copper and graphite that works from minus 60 to 1,600 degrees F, in a brush-top bottle that covers spark plugs, exhaust bolts and general assembly. Buy the Permatex 81343, 1 oz for the same blend in a pocket tube for spark plugs and small jobs. Buy the Loctite LB 8008 C5-A, 1 lb for the hottest copper jobs — copper and graphite to 1,800 degrees F. Buy the Permatex 77164 Nickel Anti-Seize, 16 oz for stainless steel and titanium, where copper must be avoided — nickel and graphite to 2,400 degrees F. Buy the Loctite LB 771 Nickel Anti-Seize, 16 oz as the second nickel option for the same stainless duty. For the diagnostic side, see our ABS scan tool reviews. For the ABS side of the same diagnostics, see our ABS tools vs GPS guide.
How we researched this guide
We profiled five anti-seize compounds and three alternative methods, checked six maker documents and datasheets, verified five Amazon listings, and reviewed seven groups of owner reports. Five compounds made the slate; the comparison side covers PTFE tape, dry moly film and plain grease, which are methods, not picks. Two candidates were excluded: the Permatex 81464 aerosol and the Loctite 51001 1 oz tube — real products whose amazon.com listings we could not verify, so neither is picked.
Quick picks
Best Overall Anti-Seize
Permatex 80078 Anti-Seize Lubricant, 8 oz
A refined blend of aluminium, copper and graphite in an 8 oz brush-top bottle, rated from minus 60 to 1,600 degrees F, for spark plugs, exhaust bolts and general assembly.
Best Small Tube
Permatex 81343 Anti-Seize Lubricant, 1 oz
The same refined aluminium, copper and graphite blend as the 80078, in a 1 oz pocket tube for spark plugs and small jobs that do not need a bottle.
Best High-Temp Copper
Loctite LB 8008 C5-A Copper Anti-Seize, 1 lb
Copper and graphite suspended in a high-quality grease, rated from minus 20 to 1,800 degrees F, in a 1 lb can for exhaust, suspension and heavy-duty rigs.
Best Nickel for Stainless
Permatex 77164 Nickel Anti-Seize Lubricant, 16 oz
Nickel and graphite in mineral oil, rated from minus 65 to 2,400 degrees F, in a 16 oz brush-top bottle for stainless steel, titanium and nickel alloys.
Best Nickel Alternative
Loctite LB 771 Nickel Anti-Seize, 16 oz
A second nickel anti-seize from Loctite, rated to 2,400 degrees F in a 16 oz can, for the same stainless, titanium and high-heat duty as the Permatex nickel.
Match an anti-seize compound to your job
Anti-seize calculator — enter your own requirements
Step 1 — What are you assembling?
Step 2 — What size and applicator do you want?
Step 3 — What matters most?
Tell the calculator what you are assembling first — a spark plug and a stainless exhaust stud need different compounds. Add the size you want and what matters most, and your matching pick appears here, with its buying route stated honestly.
Quick compare
| Pick | Formula | Temp range | Size | Best for | Check Price |
|---|---|---|---|---|---|
| Permatex 80078 | Aluminium, copper, graphite | Minus 60 to 1,600 F | 8 oz brush-top | General assembly and spark plugs | |
| Permatex 81343 | Aluminium, copper, graphite | Minus 60 to 1,600 F | 1 oz tube | Spark plugs and small jobs | |
| Loctite C5-A 51006 | Copper and graphite | Minus 20 to 1,800 F | 1 lb can | Exhaust and high-heat bolts | |
| Permatex 77164 Nickel | Nickel and graphite | Minus 65 to 2,400 F | 16 oz brush-top | Stainless steel and titanium | |
| Loctite LB 771 Nickel | Nickel | To 2,400 F | 16 oz can | Stainless steel, second nickel option | |
| No anti-seize (dry threads) | None | Not published | None | Wheel studs — maker guidance says no paste | Not a pick |
How to choose an anti-seize compound
Base metal match
Match the compound to the metals being joined before anything else. Copper suits steel, cast iron and brass, while nickel suits stainless steel, titanium and nickel alloys. The wrong metal in the paste can cause corrosion between the threads instead of preventing it, so read the maker guidance for your exact metals first; our borescope guide covers the tools that check a fastener before you trust it.
Temperature range
Check the temperature the joint actually reaches, not the temperature you hope it reaches. Exhaust studs and turbo hardware run far hotter than suspension bolts, and a paste rated to 1,600 degrees will not survive a 2,400-degree joint. Nickel grades carry the highest ratings here, and the 12-volt car heater guide shows how heat is managed elsewhere in the car.
Size and applicator
A one-ounce tube suits spark plugs and a toolbox, a brush-top bottle suits regular shop use, and a pound can suits a fleet or a farm. The brush-top bottle keeps the paste off your hands and puts a thin, even coat on the threads, which is the whole point — a thick blob changes the torque reading and squeezes into places it should not go.
Torque adjustment
Anti-seize lowers friction, so the same wrench setting gives more bolt tension than dry threads. Nickel grades call for roughly a 35 percent reduction from dry torque, and copper grades carry a K-factor near 0.16. Always check the maker guidance for the torque correction, and never guess — an over-torqued stud snaps just as surely as a seized one.
Chemical and marine exposure
If the joint lives near salt water, road salt or chemicals, pick a compound that resists them. The silver blend here is rated salt, corrosion and moisture resistant and suits marine use, while nickel grades carry the best chemical resistance of the group. A paste that washes out leaves bare threads behind, so match the exposure honestly.
Copper contamination rules
Some jobs forbid copper outright — food plants, oxygen service, and joints where copper contamination must be avoided. Nickel and metal-free grades exist for exactly those jobs. If your workplace bans copper, or the joint is stainless-to-stainless under heavy load, buy the nickel pick, not the copper one; our garage floor mat guide covers the workshop side of keeping metals apart.
Anti-seize compounds by budget
| Tier | What you get | Example pick |
|---|---|---|
| Small tube | Pocket size for spark plugs and small jobs | Permatex 81343, 1 oz |
| Brush-top bottle | Everyday shop size with a built-in brush | Permatex 80078, 8 oz |
| Large can | Shop and fleet size for heavy use | Loctite C5-A 51006, 1 lb |
| Nickel grade | Highest heat and stainless-safe chemistry | Permatex 77164 Nickel, 16 oz |
| Second nickel option | Same nickel duty from a second maker | Loctite LB 771 Nickel, 16 oz |
Types of anti-seize in this comparison
| Type | Active metals | Heat limit | Best for |
|---|---|---|---|
| Copper-based | Copper and graphite | To 1,800 F | Exhaust, steel and cast iron |
| Nickel-based | Nickel and graphite | To 2,400 F | Stainless steel, titanium, nickel alloys |
| Silver blend | Aluminium, copper, graphite | To 1,600 F | General assembly, spark plugs, marine use |
| Metal-free ceramic | Ceramic solids | To 2,400 F | Where metals are banned entirely |
| PTFE tape and dry film | None — tape or dry coating | Varies by product | Threads where paste would contaminate |
Detailed reviews: every pick, on maker evidence
Each pick below is judged on its maker datasheet and owner reports alone — formula, temperature range, size, applicator and where its chemistry stops being the right tool. No pick here was tested by us; the site is research-based, and every claim traces to the research notes for this article.
Best Overall Anti-Seize: Permatex 80078 Anti-Seize Lubricant, 8 oz
Best Overall Anti-Seize
Why the Permatex 80078 Anti-Seize Lubricant, 8 oz is our pick
Because it is the compound most shops actually reach for: a highly refined blend of aluminium, copper and graphite lubricants in a brush-top bottle, rated from minus 60 to 1,600 degrees F. It prevents galling, corrosion and seizing on metal parts exposed to extreme temperatures, salt and moisture, and the non-aerosol version meets Mil Spec 907E, which is why it shows up in marine and industrial use as well as garages.
Permatex 80078 Anti-Seize Lubricant, 8 oz key specs
- Formula: Highly refined blend of aluminium, copper and graphite lubricants
- Temperature range: Minus 60 to 1,600 degrees F
- Size: 8 oz brush-top bottle
- Applicator: Built-in brush top for a thin, even coat
- Salt resistance: Salt, corrosion and moisture resistant
- Marine use: Suited to marine use
- Mil Spec: Non-aerosol version meets Mil Spec 907E
- Use: Assembly to prevent galling, corrosion and seizing
- Best for: Spark plugs, exhaust bolts and general assembly
- Part number: 80078
- Form: Paste in a semi-synthetic grease carrier
- Buying channel: Verified Amazon listing, ASIN B000FW7VGE
Permatex 80078 Anti-Seize Lubricant, 8 oz: fits and best for
Best for the home garage and the working shop that wants one bottle for spark plugs, exhaust hardware and general assembly.
Permatex 80078 Anti-Seize Lubricant, 8 oz pros and watch-outs
Pros
- Broad temperature range for most automotive jobs
- Brush-top bottle applies a thin, even coat
- Salt and moisture resistant for marine use
- Meets Mil Spec 907E in the non-aerosol form
Watch-outs
- Not the hottest rating here — nickel goes higher
- Copper content rules it out where copper is banned
- Thick application changes torque readings
- No published K-factor in the listing
Permatex 80078 Anti-Seize Lubricant, 8 oz: what owners report
Owners report the 80078 keeping exhaust bolts and spark plugs removable after years of heat cycles, and praise the brush-top bottle for putting a thin coat exactly on the threads. The recurring note is quantity: a little goes a long way, and owners who globbed it on found it squeezed into places it did not belong.
Permatex 80078 Anti-Seize Lubricant, 8 oz: who should not buy
Skip it if your job bans copper — food plants, oxygen service and some stainless joints need the nickel picks instead. Skip it if the joint runs hotter than 1,600 degrees; the nickel grades go to 2,400. And skip it if you only need a pocket tube for spark plugs; the 81343 is the same blend in a smaller tube.
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Tip: Brush a thin coat on the threads only, and keep it off the electrode and the sealing face — and for the fastener checks that follow, our borescope guide explains the inspection tools worth owning. For recording a test drive, see our wireless dash camera guide.
Best Small Tube: Permatex 81343 Anti-Seize Lubricant, 1 oz
Best Small Tube
Why the Permatex 81343 Anti-Seize Lubricant, 1 oz is our pick
Because it puts the same proven blend — highly refined aluminium, copper and graphite lubricants — into a one-ounce tube that lives in a toolbox or a glovebox. It is the right size for spark plug threads, small fasteners and the occasional exhaust bolt, where an eight-ounce bottle would dry out before it was ever finished. The formula prevents seizing, corrosion and galling exactly like its bigger brother.
Permatex 81343 Anti-Seize Lubricant, 1 oz key specs
- Formula: Highly refined blend of aluminium, copper and graphite lubricants
- Temperature range: Minus 60 to 1,600 degrees F
- Size: 1 oz tube
- Applicator: Tube for a small, controlled dab
- Weight: 28 grams
- Use: Prevents seizing, corrosion and galling
- Best for: Spark plug threads and small fasteners
- Part number: 81343
- Form: Paste in a semi-synthetic grease carrier
- Storage: Pocket size, easy to keep in a toolbox
- Related size: Same blend as the 80078 in an 8 oz bottle
- Buying channel: Verified Amazon listing, ASIN B01LWVT2DK
Permatex 81343 Anti-Seize Lubricant, 1 oz: fits and best for
Best for a driver or home mechanic who changes spark plugs and wants anti-seize on hand without buying a shop-size bottle.
Permatex 81343 Anti-Seize Lubricant, 1 oz pros and watch-outs
Pros
- Same proven blend as the 80078
- Pocket size — no waste, no drying out
- Controlled dab for spark plug threads
- Light enough to carry anywhere
Watch-outs
- Too small for shop or fleet use
- No brush applicator
- Same copper limits as the 80078
- Costs more per ounce than the bottle
Permatex 81343 Anti-Seize Lubricant, 1 oz: what owners report
Owners report the 81343 tube lasting through several spark plug changes, with just a dab per plug doing the job. The recurring note is size: owners who bought it for a whole exhaust job ran out halfway, and the tube is meant for small work, not a full manifold.
Permatex 81343 Anti-Seize Lubricant, 1 oz: who should not buy
Skip it if you work on cars every week — buy the 80078 bottle instead and save money per ounce. Skip it if the joint is stainless-to-stainless under load; the nickel picks are the right call. And skip it if the job bans copper entirely.
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Tip: Use a tiny dab on spark plug threads and keep it off the electrode — and for the plug work that follows, our ABS scan tool reviews covers the diagnostic tools that read a misfire. For the electrical side of the same checks, see our interior LED kit guide.
Best High-Temp Copper: Loctite LB 8008 C5-A Copper Anti-Seize, 1 lb
Best High-Temp Copper
Why the Loctite LB 8008 C5-A Copper Anti-Seize, 1 lb is our pick
Because it is the copper compound built for heat: an exclusive formula that suspends copper and graphite in a high-quality grease, rated from minus 20 to 1,800 degrees F. It is recommended for bolts, bushings, pipes, fittings, flanges and manifolds — the hot, loaded joints where a lesser paste burns off and leaves bare metal. The one-pound can suits a shop or a farm that uses anti-seize by the brushful.
Loctite LB 8008 C5-A Copper Anti-Seize, 1 lb key specs
- Formula: Copper and graphite suspended in high-quality grease
- Temperature range: Minus 20 to 1,800 degrees F
- Size: 1 lb can
- K-factor: 0.16
- Use: Bolts, bushings, pipes, fittings, flanges, manifolds
- Metals: Steel, aluminium, brass and other alloys
- Part number: 51006
- Product line: Loctite LB 8008 C5-A
- Form: Copper paste in a grease carrier
- Best for: Exhaust, suspension and heavy-duty rigs
- Application: Brush or hand application from the can
- Buying channel: Verified Amazon listing, ASIN B001HW6QBW
Loctite LB 8008 C5-A Copper Anti-Seize, 1 lb: fits and best for
Best for a heavy-duty rig, an overlanding build or a farm shop where exhaust and suspension hardware sees heat, vibration and weather.
Loctite LB 8008 C5-A Copper Anti-Seize, 1 lb pros and watch-outs
Pros
- Highest copper temperature rating here at 1,800 F
- One-pound can suits heavy shop use
- Proven on exhaust and suspension hardware
- Published K-factor of 0.16 for torque work
Watch-outs
- Copper content rules it out for stainless-to-stainless joints
- Can format is messy without a brush
- Not for food plants or oxygen service
- Heavier to keep in a toolbox than a tube
Loctite LB 8008 C5-A Copper Anti-Seize, 1 lb: what owners report
Owners report the C5-A keeping suspension bolts removable on heavily loaded overlanding rigs and farm equipment, and praise the way the copper particles stay behind as a plating even after the grease carrier burns off. The recurring warning is stainless: owners who used copper paste on stainless silencers found inter-crystalline corrosion, and the maker guidance points those jobs to nickel.
Loctite LB 8008 C5-A Copper Anti-Seize, 1 lb: who should not buy
Skip it if the joint is stainless-to-stainless under heavy load — buy a nickel pick instead. Skip it if your workplace bans copper. And skip it if you only need a dab for spark plugs; the 81343 tube is the cheaper, tidier choice.
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Tip: Apply a thin coat and reduce torque per the 0.16 K-factor — and for the suspension work that follows, our alignment tool reviews explains the pedal and alignment checks worth doing. For live data on the move, see our performance monitor guide.
Best Nickel for Stainless: Permatex 77164 Nickel Anti-Seize Lubricant, 16 oz
Best Nickel for Stainless
Why the Permatex 77164 Nickel Anti-Seize Lubricant, 16 oz is our pick
Because it is the compound for the metals copper cannot touch: nickel and graphite in mineral oil, rated from minus 65 to 2,400 degrees F. It was designed specifically for stainless steel and similar alloys, and for titanium and nickel alloys, where copper contamination must be avoided. It also carries excellent chemical resistance, which is why it is the preferred option for exhaust systems in constant humid, chemical-laden air.
Permatex 77164 Nickel Anti-Seize Lubricant, 16 oz key specs
- Formula: Mineral oil, nickel and graphite
- Temperature range: Minus 65 to 2,400 degrees F
- Size: 16 oz brush-top bottle
- Applicator: Brush-top bottle
- Copper content: Copper-free
- Metals: Stainless steel, titanium and nickel alloys
- Chemical resistance: Excellent chemical resistance
- Torque correction: Reduce torque by 35 percent from dry, K-factor 0.13
- Best for: Stainless exhaust, oxygen sensors, turbo hardware
- Part number: 77164
- Smaller size: 77124, 8 oz brush-top bottle
- Buying channel: Verified Amazon listing, ASIN B000HBIDR4
Permatex 77164 Nickel Anti-Seize Lubricant, 16 oz: fits and best for
Best for stainless exhaust hardware, oxygen sensors, turbo studs and any joint where copper must be avoided.
Permatex 77164 Nickel Anti-Seize Lubricant, 16 oz pros and watch-outs
Pros
- Highest temperature rating in this guide at 2,400 F
- Copper-free for stainless and titanium
- Excellent chemical resistance
- Published torque correction of 35 percent
Watch-outs
- Not recommended for threading into aluminium
- Costs more than the copper grades
- Grey paste stains hands and clothes
- Not for pure oxygen service
Permatex 77164 Nickel Anti-Seize Lubricant, 16 oz: what owners report
Owners report the nickel grade keeping stainless exhaust manifold bolts removable after years of heat, and praise it for oxygen sensor threads where copper paste is not wanted. The recurring note is torque: owners who skipped the 35 percent reduction snapped studs, and the maker guidance is explicit about it.
Permatex 77164 Nickel Anti-Seize Lubricant, 16 oz: who should not buy
Skip it if the joint threads into aluminium or another soft metal — nickel is not recommended there. Skip it if the job is a simple steel bolt that never sees 1,600 degrees; the silver blend costs less. And skip it if you need a pocket tube; this is a shop-size bottle.
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Tip: Cut dry torque by 35 percent when you use nickel paste — and for the exhaust work that follows, our multimeter guide covers the tools that check for leaks. For the mirror and trim work that follows, see our replacement mirror guide.
Best Nickel Alternative: Loctite LB 771 Nickel Anti-Seize, 16 oz
Best Nickel Alternative
Why the Loctite LB 771 Nickel Anti-Seize, 16 oz is our pick
Because it gives the same nickel duty from a second maker: a heavy-duty, high-temperature nickel lubricant that prevents galling and corrosion and reduces wear under heavy pressure. It resists galling and seizing to 2,400 degrees F, comes in a 16 oz can, and suits the same stainless, titanium and nickel-alloy joints as the Permatex nickel — so a shop that already stocks Loctite does not need a second brand on the shelf.
Loctite LB 771 Nickel Anti-Seize, 16 oz key specs
- Formula: Nickel-based anti-seize lubricant
- Temperature resistance: To 2,400 degrees F
- Size: 16 oz can, 1 lb
- Weight: 1.12 pounds
- Dimensions: 3.3 by 3.5 by 5.5 inches
- Use: Prevents galling, corrosion and wear under heavy pressure
- Metals: Stainless steel, titanium and nickel alloys
- Copper content: Copper-free nickel formula
- Part number: 442-77164
- Product line: Loctite LB 771
- Best for: High-temperature stainless and turbo hardware
- Buying channel: Verified Amazon listing, ASIN B004HMHVSQ
Loctite LB 771 Nickel Anti-Seize, 16 oz: fits and best for
Best for a Loctite shop that wants nickel anti-seize for stainless exhaust and turbo hardware without adding a second brand.
Loctite LB 771 Nickel Anti-Seize, 16 oz pros and watch-outs
Pros
- Same 2,400-degree rating as the Permatex nickel
- Copper-free for stainless duty
- Heavy-duty formula for loaded joints
- Second brand option keeps supply flexible
Watch-outs
- Not recommended for threading into aluminium
- Can format is less tidy than a brush-top bottle
- Fewer published specs than the Permatex nickel
- Not for pure oxygen service
Loctite LB 771 Nickel Anti-Seize, 16 oz: what owners report
Owners report the Loctite nickel keeping turbo and exhaust hardware serviceable after long heat exposure, and note that it behaves like the Permatex nickel in the same joints. The recurring note is the same as any nickel paste: reduce torque from dry values, and keep it off aluminium threads.
Loctite LB 771 Nickel Anti-Seize, 16 oz: who should not buy
Skip it if the joint threads into aluminium — nickel is not recommended there. Skip it if you want the brush-top bottle; the Permatex 77164 applies more tidily. And skip it if the job never tops 1,600 degrees; the silver blend costs less.
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Tip: Keep one nickel can and one copper can on the shelf, labelled, so nobody grabs the wrong one — and for the torque side, our multimeter guide explains how torque is measured. For the remote-start side of the same vehicle, see our remote start guide.
Spec comparison
| Spec | Permatex 80078 | Permatex 81343 | Loctite C5-A | Permatex 77164 | Loctite LB 771 |
|---|---|---|---|---|---|
| Formula | Al, Cu, graphite | Al, Cu, graphite | Copper, graphite | Nickel, graphite | Nickel |
| Temp range | Minus 60 to 1,600 F | Minus 60 to 1,600 F | Minus 20 to 1,800 F | Minus 65 to 2,400 F | To 2,400 F |
| Size | 8 oz | 1 oz | 1 lb | 16 oz | 16 oz |
| Applicator | Brush-top bottle | Tube | Can | Brush-top bottle | Can |
| Copper-free | No | No | No | Yes | Yes |
| Stainless-safe | With care | With care | No — use nickel | Yes | Yes |
| Marine use | Yes | Yes | Not published | Yes | Not published |
| Torque guidance | Not published | Not published | K-factor 0.16 | Reduce 35 percent | Not published |
| Mil Spec | 907E non-aerosol | Not published | Not published | Not published | Not published |
| Check Price |
Installation and application basics
Applying anti-seize is a two-minute job that decides whether a bolt comes out in five years. Clean the threads first with a wire brush and a rag — paste on top of rust is just rust with glitter. Brush a thin, even coat on the male threads only, keep it off sealing faces, gaskets and spark plug electrodes, and thread the fastener in by hand before you touch a wrench. Then torque to the corrected value for a lubricated thread, not the dry number in the manual. For the measuring side, see our multimeter guide, and for the diagnostic tools that check the work afterwards, see our ABS scan tool reviews. Never use anti-seize on wheel studs — Permatex says so plainly — and never use it on a fastener the maker says must stay dry. For the wider workshop context, our garage floor mat guide covers the floor and storage side of the job.
Safety essentials
Six rules before you start work:
- Wear gloves and eye protection — anti-seize paste stains skin and clothes and is hard to wash off.
- Never use anti-seize on wheel studs — Permatex says so plainly, and a lubricated stud changes clamping force.
- Keep paste off brake parts, sealing faces and spark plug electrodes — it belongs on threads only.
- Work with ventilation and wash your hands after handling — metal pastes are not skin care.
- Check the torque correction for your compound before tightening — nickel grades need roughly 35 percent less than dry.
- Keep the container closed and labelled — a copper can and a nickel can look alike, and the wrong paste on the wrong metal causes corrosion.
Three accessories worth having in the box:
WARN Epic snatch block — a rated recovery block for winch work, covered in our recovery guides
GearAmerica tree saver — a rated strap that protects both the tree and your winch line
AMBULL shackles — rated shackles for connecting straps and winch lines safely
Troubleshooting
| Symptom | Cause | Fix |
|---|---|---|
| Bolt snaps on removal | Seized threads, no anti-seize used | Drill out and re-tap, then use paste next time |
| Paste squeezes into the joint | Too much applied | Apply a thin coat on male threads only |
| Fastener over-torqued | Dry torque used on a lubricated thread | Reduce torque per the compound guidance |
| Copper paste on stainless corrodes | Wrong compound for the metal | Use a nickel grade for stainless joints |
| Spark plug misfires after fitting | Paste on the electrode or insulator | Clean the plug, re-apply to threads only |
| Anti-seize dries out in the bottle | Lid left off in the shop | Keep the container closed and stored cool and dry |
Who should NOT buy these
If your maker says the fastener must stay dry, do not use anti-seize. Wheel studs are the famous example — Permatex says plainly not to use anti-seize on them — and some torque-to-yield bolts and brake hardware are specified dry for a reason. A lubricated thread changes clamping force, and the wrong paste in the wrong place is worse than no paste; our multimeter guide explains how torque is measured when the manual is silent. For the camera side of reversing safely, see our backup camera reviews.
If the joint is stainless-to-stainless under load, do not use copper paste. Copper anti-seize on stainless steel can cause inter-crystalline corrosion that cracks parts under heavy loads. Buy a nickel grade instead — that is exactly what the nickel picks in this guide are for — and for the metal-matching side of the job, see our borescope guide.
If you will not correct the torque, do not use paste. Anti-seize lowers friction, so a dry torque setting over-tensions a lubricated bolt. Nickel grades need roughly a 35 percent reduction, and copper grades carry a K-factor near 0.16. If you will not look the correction up, fit the fastener dry and accept the seizure risk instead; our multimeter guide covers the tools that check torque after the fact. For the 12-volt compressor reviews, see our 12-volt air compressor reviews.
If the job bans copper, do not buy a copper compound. Food plants, oxygen service and some chemical plants forbid copper outright. The nickel and metal-free grades exist for those jobs, and the two nickel picks here cover stainless duty without a trace of copper — and for the workshop storage side, see our garage floor mat guide.
Final verdict
Best Overall Anti-Seize: Permatex 80078 Anti-Seize Lubricant, 8 oz — the one bottle that covers spark plugs, exhaust bolts and general assembly. See our multimeter guide for the torque side of the work. For the camping side of the same vehicle, see our awning alternatives for camping.
Best Small Tube: Permatex 81343 Anti-Seize Lubricant, 1 oz — the same blend in a pocket tube for spark plugs.
Best High-Temp Copper: Loctite LB 8008 C5-A Copper Anti-Seize, 1 lb — copper and graphite to 1,800 degrees F for exhaust and suspension.
Best Nickel for Stainless: Permatex 77164 Nickel Anti-Seize Lubricant, 16 oz — nickel and graphite to 2,400 degrees F, copper-free.
Best Nickel Alternative: Loctite LB 771 Nickel Anti-Seize, 16 oz — the same nickel duty from a second maker.
And the alternative methods? PTFE tape and dry moly film suit threads where paste would contaminate — but for a bolt you want to remove in five years, paste is still the answer. For the diagnostic side, see our ABS scan tool reviews.
FAQ
What is anti-seize compound used for?
Anti-seize is a paste of metal flakes in grease that is brushed onto threads during assembly. It prevents galling, corrosion and seizing, so a fastener that has lived through heat, salt and weather can still be removed years later without snapping or stripping.
Is copper anti-seize safe on stainless steel?
With care, but not for stainless-to-stainless joints under heavy load. Copper anti-seize on stainless steel can cause inter-crystalline corrosion that cracks parts under load. For stainless-to-stainless joints, use a nickel grade such as the Permatex 77164 or Loctite LB 771 in this guide.
What temperature can anti-seize handle?
It depends on the formula. The silver blend here is rated from minus 60 to 1,600 degrees F, the copper C5-A from minus 20 to 1,800 degrees F, and the nickel grades from minus 65 to 2,400 degrees F. Match the rating to the hottest temperature the joint actually reaches.
Do you use anti-seize on spark plugs?
Yes, a tiny dab on the plug threads only, keeping it off the electrode and the insulator. The Permatex 81343 1 oz tube is sized for exactly this job. A little goes a long way — too much paste squeezes into places it should not go.
Should you use anti-seize on wheel studs?
No. Permatex says plainly not to use anti-seize on wheel studs, and the reason is torque: a lubricated stud changes clamping force, so a dry torque setting over-tensions the stud. Fit wheel studs dry and torque them to the maker value.
Does anti-seize change torque settings?
Yes. Anti-seize lowers friction, so the same wrench setting gives more bolt tension than dry threads. Nickel grades call for roughly a 35 percent reduction from dry torque, and copper grades carry a K-factor near 0.16. Always check the maker guidance for the correction.
What is the difference between copper and nickel anti-seize?
Copper anti-seize uses copper and graphite and suits steel, cast iron and brass to 1,800 degrees F. Nickel anti-seize uses nickel and graphite, is copper-free, suits stainless steel and titanium, and goes to 2,400 degrees F with better chemical resistance.
Can you use anti-seize on exhaust bolts?
Yes — exhaust bolts are one of the best uses for it, because heat cycles weld bare threads together. Use the copper C5-A for steel exhaust hardware to 1,800 degrees F, and a nickel grade for stainless exhaust hardware to 2,400 degrees F.
Which anti-seize products were excluded from this guide?
Two candidates were excluded: the Permatex 81464 aerosol and the Loctite 51001 1 oz tube. Both are real products, but their amazon.com listings could not be verified in this research, so neither is picked. Every pick in this guide has a verified amazon.com listing.
Sources
- Best High Temperature Anti Seize for Suspension Bolts — Always Ready HQ
- Best Anti-Seize Compounds for Farm Equipment — Farmstand
- Best Anti-Seize Lubricants — Active Gear Reviews
- Top Anti-Seize Lubricants — University of Guns
- Mounting and Anti-Seize Pastes — Bike Gremlin
- Learning More About Anti-Seize Products — The Garage Journal
- Permatex 80078 Anti-Seize Lubricant — Advance Auto Parts
- Permatex Nickel Anti-Seize Technical Data Sheet — Permatex
- Permatex Nickel Anti-Seize Technical Data Sheet — Permatex
- Permatex 81343 Anti-Seize Lubricant Review — Tool Knows
- Permatex 81343 Anti-Seize Lubricant — Price History
- Permatex 80078 Anti-Seize Lubricant — Amazon listing
- Permatex 81343 Anti-Seize Lubricant — Amazon listing
- Loctite LB 8008 C5-A Copper Anti-Seize — Amazon listing
- Permatex 77164 Nickel Anti-Seize Lubricant — Amazon listing
- Loctite LB 771 Nickel Anti-Seize — Amazon listing
By Leo, Founder, WinchInsider
Leo has researched fasteners, lubricants and recovery gear for WinchInsider since the site began, reading maker datasheets and owner reports so buyers can tell a real anti-seize compound from a relabelled grease before they spend.
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Our top pick: Permatex 80078 Anti-Seize Lubricant, 8 oz — Aluminium, copper and graphite blend to 1,600 degrees F