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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. 2024-12-18)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.
EyesSituationalMfr. SDS §8Skin—No PPE in published sourcesLungsSituationalMfr. SDS §8 · 29 CFR 1910.1200(f) · GHS H304Ventilation—No PPE in published sourcesShow details for all categories ▾Hide details ▴
From the manufacturer’s Safety Data Sheet, Section 8
“No eye irritation or serious eye damage classification in SDS §2. Aerosol mist near the face during spray application is the specific exposure trigger — eye protection applies in that scenario.”
— WD-40
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 skin. Absence does not imply “not needed” — consult the full Safety Data Sheet.
From the manufacturer’s Safety Data Sheet, Section 8
“No respiratory irritation classification (H335) in SDS §2. The aerosol form factor creates fine mist during application — aerosol mist in enclosed spaces is the primary inhalation risk. H336 (narcotic effects from STOT SE 3) is a CNS hazard, not a respiratory irritant, and does not escalate the lungs tier above situational.”
— WD-40
U.S. regulatory standard
29 CFR 1910.1200(f); 1910.132(d)
“The employer shall assess the workplace to determine if hazards are present, or are likely to be present, which necessitate the use of personal protective equipment.”
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.
The published Safety Data Sheet for this product does not specify ventilation protection for consumer use.
Workplace context
29 CFR 1910.134(a); 1910.1000
“the primary objective shall be to prevent atmospheric contamination [via] accepted engineering control measures (for example, enclosure or confinement of the operation, general and local ventilation…).”
Triggered by GHS H336 on the SDS.
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
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
Performance claims are manufacturer-only — only 3 Amazon reviews exist from 2013–2014. The DANGER signal word comes from an aspiration hazard if swallowed, not inhalation chemistry. Aerosol mist in enclosed spaces is the primary inhalation risk.
What it is and how it performs
An aerosol penetrating oil for freeing rusted nuts, bolts, threads, locks, and chains. The Smart Straw flips between a precision stream and a fan spray for tight clearances. The Blu Torch Technology additive package claims protective residue that resists re-seizure — unconfirmed by independent reviews. Buyers actively shopping the category should compare against products with documented community records.
Safety and environmental impact
DANGER signal word from H304 aspiration toxicity — swallowing risk, not inhalation in normal use. Do not induce vomiting if ingested; seek medical attention. Aerosol mist in enclosed spaces is the primary inhalation risk. No respiratory irritation code at the mixture level. Prop 65 not required per the 2024 SDS; CARB compliant. Petroleum-distillate carrier is expected to harm aquatic life per SDS §12.
FAQ
Is this safe on rubber and plastic? The Amazon listing states compatibility with metal, plastic, and rubber; SDS has no incompatibility warnings. Test on a small area first for delicate trim.
Why DANGER if there's no respiratory irritation code? H304 drives DANGER — aspiration toxicity if swallowed, not an inhalation risk during normal spray use.
From the manufacturer
Marketing copy from WD-40, via Amazon. Not editorial.
- •Rust release spray frees components that have been rusted together
- •Protects surfaces against future corrosion
- •Proprietary formula penetrates into crevices to quickly free rusted threads, nuts, bolts, locks, and chains
- •Lubricant can be used on metal, plastic, and rubber
- •Permanently attached, hinged straw offers the option of a precision stream or fan-shaped spray
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Manufacturer images
Manufacturer specifications
- Brand
- WD-40
- Liquid Volume
- 11 Fluid Ounces
- Item Form
- Spray
- Unit Count
- 11.0 Fluid Ounces
- Brand Name
- WD-40
- Part Number
- 300004
- ASIN
- B0083V8JP6
- Customer Reviews
- 3.7 3.7 out of 5 stars (3) 3.7 out of 5 stars
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Top Amazon review
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