CarCareTruth Score
Decent, but wear gloves and ventilate.
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Prices may varyThe manufacturer's Safety Data Sheet classifies this product with one or more GHS Category 1 health hazards — the most severe tier. The hazard statements in quotes below are the verbatim GHS language from the SDS, as required by OSHA's Hazard Communication Standard. The line under each statement translates the GHS classification into plain language.
GHS Category 1 eye damage — classified as causing irreversible eye damage on contact.
If swallowed, inhaled, or splashed in eyes:
Call Poison Control immediately at 1-800-222-1222 (US, 24/7, free) and have the product container with you. Poison Control's standing guidance is to not induce vomiting after chemical exposure; they will direct first-aid steps based on the specific product.
About 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 the manufacturer's safety sheet. They do not replace the SDS or substitute for a hazard assessment specific to your task.
Health score is for adult use as intended, per the manufacturer's SDS. It does not model child ingestion, accidental spill cleanup, or off-label use. See the safety panel below for full hazard classification, and /disclaimer for the full editorial scope.
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.
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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.
This product ranks #5 of 6 in Anti-Seize Compound.Three above it ↓
Last reviewed May 26, 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.
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. Owner reviews spanning 2016·2025 consistently report clean disassembly on exhaust hardware after multi-year service. The 1800°F rating covers most daily-driver applications.
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.
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.
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.
The product is rated from −20°F (−29°C) to 1800°F (980°C) per the label and the product listing. This covers exhaust manifold studs, spark plug threads, and brake hardware on most daily-driver vehicles.
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.
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.
Marketing copy from Loctite, via Amazon. Not editorial.
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