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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 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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Only when: when spraying · in enclosed space
Translated from the manufacturer’s Safety Data Sheet, Section 8
SDS Section 8 states no special eye protection is required for normal use, but calls for chemical eye goggles in tanks and confined spaces. Section 2 carries no eye-hazard GHS code and Section 11 rates eye contact only 'minimally irritating', so this is a confined-space/overspray precaution rather than a mixture-level eye hazard.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
Translated from the manufacturer’s Safety Data Sheet, Section 8
SDS Section 8 calls for protective gloves and protective clothing. Section 11 reports that prolonged skin contact could cause irritation, which backs up the glove call even though Section 2 carries no skin-hazard GHS code.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
Only when: when spraying · in enclosed space
Translated from the manufacturer’s Safety Data Sheet, Section 2
Aerosol form factor creates fine mist near face level. No inhalation H-codes (H335, H331, H330, H334) appear in §2 mixture classification. The aerosol mist itself is the inhalation exposure trigger in enclosed or poorly ventilated spaces.
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.
California Prop 65 warning
This product's Amazon listing carries a California Prop 65 warning. The manufacturer's Safety Data Sheet (§15) does not list a Prop 65 substance for this product — we show the warning for transparency and flag the discrepancy rather than silently picking a side.
Scope of these PPE tiers. The tiers on this page translate the product's Safety Data Sheet where one is published, plus its ingredient chemistry, into a comparable rating. They describe a formulation, not a situation: a tier is not a safety determination for any specific user, task, quantity, or environment. The manufacturer's label and use instructions govern how the product is handled. Where the product is used at work, the employer's PPE program and hazard assessment under 29 CFR 1910.132 decide what protection is selected, not this page.
No warranties. CarCareTruth makes no warranties, express or implied, and expressly disclaims the implied warranties of merchantability and fitness for a particular purpose.
This product ranks #1 of 24 in Penetrating Oil / Multi-Purpose Lubricant.
Last reviewed May 26, 2026
TL;DR No Prop 65 chemicals, no health-hazard GHS codes · the DANGER rating is driven entirely by the flammable aerosol format. Owners cite it most often for seized hinges and multi-season underbody rust prevention, and it's earned a devoted following in the salt belt. The non-drying residue keeps fasteners protected at the next service rather than evaporating away. Aerosol mist in enclosed spaces is the primary inhalation exposure concern.
Fluid Film NAS delivers a non-drying protective oil to corroded joints to free seized fasteners and prevent rust. The manufacturer describes it as a lanolin-influenced formula (per the manufacturer's product page); the SDS discloses a heavy petroleum base oil with a sulfonated corrosion inhibitor · no petroleum solvents or naphtha in the carrier. owners and BITOG forum threads (2020-2025) document consistent success on light-to-moderate rust, and it has earned a devoted following in the salt belt. The non-drying film is the product's defining differentiator: it stays active and protects threads at the next service rather than evaporating away.
Salt-belt owners and seasonal rustproofing projects are the natural fit. BITOG threads (2020-2025) document multi-season results from annual underbody application. Skip it if you need the fastest possible penetration on deeply corroded fasteners · thin-solvent competitors wick faster initially. Limit enclosed-space use; aerosol mist is the primary inhalation concern.
DANGER from H222 (extremely flammable aerosol) and H229 (pressurized container) · physical-hazard codes only, no health-tier GHS codes in §2. SDS §15 (2024 Eureka Chemical revision) explicitly states no Proposition 65 chemicals. Aerosol mist in enclosed spaces is the inhalation exposure pathway. Environmental: CARB 310 compliant (VOC <219 g/L), no aquatic toxicity classification at mixture or ingredient level. The petroleum base-oil carrier is not readily biodegradable.
The Safety Data Sheet for Fluid Film NAS Aerosol Penetrant & Lubricant carries a DANGER signal word, with classified hazards including H222 (extremely flammable aerosol); H229 (pressurized container: may burst if heated). See the PPE breakdown above for use-case-specific guidance translated from the SDS hazard codes.
CarCareTruth scores Fluid Film NAS Aerosol Penetrant & Lubricant at 7.5 out of 10 on the composite CCT score, with a health sub-score of 9.0/10. 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. 2024-01-01): Refined petroleum oil, hydrotreated heavy paraffinic (CAS 64742-54-7) 40-80%; Petroleum gases, liquified, sweetened (CAS 68476-85-7) 1-25%; Benzenesulfonic Acid, Di-C10-18-alkyl derivs., calcium salts (CAS 93820-57-6) 1-10%.
Marketing copy from Fluid Film, via Amazon. Not editorial.
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