Loctite LB 8008 C5-A Anti-Seize Lubricant
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Prices may varyAbout this product's hazards. This product's Safety Data Sheet uses signal word danger. Read the manufacturer's SDS and follow all safety instructions before use. CarCareTruth ratings translate SDS data — they do not replace the SDS or substitute for a hazard assessment specific to your task.
From the Safety Data Sheet
Full SDS ↗ (rev. 2022-05-11)GHS hazard codes are quoted from the manufacturer’s Safety Data Sheet. PPE tiers below translate those codes and the listed ingredient chemistry; they are not CarCareTruth recommendations.
EyesRequiredMfr. SDS §8 · 29 CFR 1910.133(a)(1) · GHS H318SkinRecommendedMfr. SDS §8 · 29 CFR 1910.138(a) · GHS H315LungsSituationalMfr. SDS §8 · 29 CFR 1910.134 · GHS H372Ventilation—No PPE in published sourcesShow details for all categories ▾Hide details ▴
From the manufacturer’s Safety Data Sheet, Section 8
“H318 (serious eye damage Cat 1) in SDS §2 — brush application with possible flick-splash; eye contact can cause permanent injury.”
— Loctite
U.S. regulatory standard
29 CFR 1910.133(a)(1); 1910.151(c)
“The employer shall ensure that each affected employee uses appropriate eye or face protection when exposed to eye or face hazards from… liquid chemicals, acids or caustic liquids…”
ANSI Z87.1 (chemical splash protection — incorporated via §1910.6)
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
From the manufacturer’s Safety Data Sheet, Section 8
“H315 (skin irritation Cat 2) in SDS §2. Petroleum-grease paste stains and requires wash-after-use.”
— Loctite
U.S. regulatory standard
29 CFR 1910.138(a)
“appropriate hand protection when employees' hands are exposed to hazards such as those from… chemicals which produce an adverse effect on the skin or eyes…”
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
From the manufacturer’s Safety Data Sheet, Section 8
“Paste format has no inhalation pathway during application. SDS §11 confirms silica (H372 basis) is encapsulated and not aerosolized in normal use. Thermal decomposition fumes possible on first heat cycle in service — ventilation recommended during initial drive cycle after application to high-temperature hardware.”
— Loctite
U.S. regulatory standard
29 CFR 1910.134; 1910.138; 1910.1000
“Each employer shall assure that no employee is exposed [in excess of the PEL]…”
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
UN GHS hazard statement
H372“Causes damage to organs through prolonged or repeated exposure”
UN GHS Rev. 9 (2021)
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
No PPE specified in published sources for ventilation. Absence does not imply “not needed” — consult the full Safety Data Sheet.
PPE tiers translate the manufacturer’s SDS and U.S. regulatory standards. Not professional safety advice. How we report safety.
CarCareTruth's Analysis
Last reviewed May 20, 2026
TL;DR Reliable copper-based anti-seize rated to 1800°F — brush-top can makes application controlled, and reviews confirm fasteners come apart cleanly after years of heat cycling. DANGER signal word: wear safety goggles. Not the right choice for stainless exhaust at sustained high heat.
What it is and how it performs
Loctite LB 8008 is a copper-and-graphite paste for spark plug threads, exhaust manifold studs, and brake hardware. Brush a thin coat on before assembly; the integrated brush applies the right amount without the mess of a bulk tube. Reviews spanning 2016–2025 (4.7 stars, 73 verified purchases) consistently report clean disassembly on exhaust hardware after multi-year service. The 1800°F rating covers most daily-driver applications.
Who should buy this — and who should skip it
Best for DIY and pro mechanics doing spark plug service, exhaust work, and brake hardware on steel and cast-iron fasteners. The 4 oz can is right-sized for single jobs. Skip it for stainless exhaust at sustained high heat — copper can cause stress-corrosion cracking on stainless; use a nickel-based anti-seize instead. To avoid the Prop 65 listing, choose an aluminum-based alternative.
Safety and environmental impact
SDS §2 classifies this paste DANGER from H318 (serious eye damage Cat 1) — eye contact can cause permanent injury; wear safety goggles. H315 skin irritation also present. Prop 65 listing covers copper compounds and crystalline silica (SDS §15). Copper is acutely toxic to aquatic life; the paste stays on the fastener in normal use, but dispose of contaminated wipes as automotive waste.
Frequently asked questions
Can I use Loctite LB 8008 C5-A on stainless steel exhaust studs?▾
Copper-based anti-seize is generally not recommended for stainless steel fasteners at sustained high temperatures. Copper can cause stress-corrosion cracking on stainless at elevated heat over time. For stainless exhaust studs, a nickel-based anti-seize is the better choice.
What is the temperature rating of Loctite LB 8008?▾
The product is rated from −20°F (−29°C) to 1800°F (980°C) per the label and Amazon listing. This covers exhaust manifold studs, spark plug threads, and brake hardware on most daily-driver vehicles.
Why does this anti-seize have a DANGER signal word?▾
The DANGER classification comes from H318 (serious eye damage) in SDS §2 — the copper-and-graphite paste can cause permanent eye injury on direct contact. The signal word is not driven by a flammability or explosion hazard. Goggles are warranted when applying near the face.
Is this the same as Permatex copper anti-seize?▾
Both are copper-based anti-seize pastes rated to similar temperatures (1600–1800°F), but they are distinct formulations. Loctite LB 8008 lists crystalline silica (quartz) in its SDS, which adds H372 STOT RE Cat 1 to the classification. Verify the SDS for the product you have on hand.
From the manufacturer
Marketing copy from Loctite, via Amazon. Not editorial.
- •Size: 4 oz
- •Color: Copper
- •Mild odor
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Manufacturer specifications
- Material
- Calcium Dihydroxide, Copper, Distillates (petroleum), Graphite, Hydrotreated Heavy Naphthenic, Mineral Oil Light Naphthenic Hydrotreat. <3% DMSO, Quartz (SiO2) See more
- Brand
- Loctite
- Package Information
- Can
- Liquid Volume
- 4 Fluid Ounces
- Item Weight
- 0.3 Pounds
- Brand Name
- Loctite
- Recommended Uses For Product
- Lubricant
- Item Form
- Liquid
- Global Trade Identification Number
- 00079340511446
- Manufacturer
- Loctite
- Unit Count
- 1.0 Count
- UPC
- 079340511446
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