CarCareTruth Score
Decent.
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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 aspiration toxicity — thin, oily liquids can slip into the lungs if swallowed, causing chemical pneumonia.
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
“The DANGER signal word is driven by an aspiration/swallowing hazard classification · an ingestion pathway with no eye-contact relevance. SDS §2 carries no eye irritation or serious eye damage code. Eyes protection is situational: use safety glasses when spraying overhead or into confined gaps where misting can reach the face.”
— WD-40
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
“DANGER signal word driven by a health classification (aspiration hazard). The petroleum solvent carrier (60·80%) also presents a skin-contact concern with repeated exposure. Gloves are warranted for any extended application session.”
— WD-40
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
“No respiratory irritation classification at the mixture level. This is a brief aerosol application, typically outdoors or with the car door open. In an enclosed garage, use in short bursts with ventilation.”
— 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.
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 #1 of 7 in Silicone Lubricant.
Last reviewed June 14, 2026
Reliable at silencing door seal squeak and sticky window tracks · community confirms 4·8 weeks on outdoor rubber. The permanently attached Smart Straw flips stream or fan, which earns its keep in tight hinge gaps. Keep it off painted panels; silicone residue prevents primer and paint from adhering.
An aerosol silicone lubricant for rubber seals, weatherstripping, window channels, and plastic trim slides. The permanently attached Smart Straw flips between a focused stream and a wide fan spray · the petroleum-based carrier solvent delivers the silicone film, then evaporates. Broadly trusted by owners, the community consensus confirms first-application success on door seal squeak and window track binding, with 4·8 weeks durability under outdoor exposure. Keep it off paintable surfaces: silicone residue is difficult to degrease and will prevent primer and touch-up paint from bonding.
Best for squeaky door seals, sticky window tracks, and rubber weatherstripping. Skip it for metal-on-metal contact (load-bearing hinges, fasteners, chains) · white lithium grease is the right tool. Never apply near brake rotors, drums, or pads.
DANGER signal word from an aspiration hazard classification · swallowing risk, not inhalation in normal use. No respiratory irritation code is present at the mixture level. The petroleum solvent carrier warrants gloves for extended work; eye protection for overhead or misting-spray situations. Spray outdoors or with the car door open. CARB compliant, no Prop 65 warning required per the 2024 SDS.
The Safety Data Sheet for WD-40 Specialist Water Resistant Silicone Lubricant carries a DANGER signal word, with classified hazards including H222 (extremely flammable aerosol); H304 (may be fatal if swallowed and enters airways). See the PPE breakdown above for use-case-specific guidance translated from the SDS hazard codes.
CarCareTruth scores WD-40 Specialist Water Resistant Silicone Lubricant at 6.3 out of 10 on the composite CCT score, with a health sub-score of 5.0/10. The CCT score blends real-world effectiveness, ingredient health impact pulled from the manufacturer's safety sheet, and environmental footprint against a published category rubric. See the methodology link on this page for the full scoring breakdown.
Per the Safety Data Sheet ingredient disclosure: SDS §3 (rev. 2024-12-18): LVP Petroleum Solvent (CAS 64742-47-8) 60·80%; Propane (CAS 74-98-6) and n-Butane (CAS 106-97-8) 10·30% combined propellant; Poly(dimethylsiloxane) (CAS 63148-62-9) 1·5%.
Marketing copy from WD-40, via Amazon. Not editorial.
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