CarCareTruth Score
Decent.
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Prices may varyHealth 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: handling concentrate
Translated from the manufacturer’s Safety Data Sheet, Section 8
SDS §2 mixture classification is 'Not classified' (no H319/H318). SDS §8 nonetheless names eye protection ('safety glasses with side shields') as a boilerplate control, and a category named there is never omitted from this panel, so it renders as situational rather than being left off.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
Especially relevant: handling concentrate · sensitive individuals
Translated from the product label
SDS §2 mixture classification is 'Not classified' (no H315/H317/H314), but the product's own retail label prints a direct hazard warning the SDS does not carry: 'WARNING: CAUSES SKIN IRRITATION. MAY CAUSE AN ALLERGIC SKIN REACTION. READ PRECAUTIONS ON BACK.' That is H315-and-H317-type language stated on the package itself. A printed hazard statement with a real basis is never downgraded to below the tier it describes, so this reads as at least a skin-irritant-and-sensitizer signal and is set to recommended rather than the SDS-only situational tier.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
Only when: in enclosed space
Translated from the manufacturer’s Safety Data Sheet, Section 8
SDS §2 mixture classification is 'Not classified' (no H335/H336/H331/H330/H334). SDS §8 nonetheless states 'respiratory protection recommended if ventilation is limited,' pure boilerplate with no confirmed inhalation hazard, but a category named in §8 is never omitted, so this renders as situational rather than being left off.
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 #3 of 24 in Penetrating Oil / Multi-Purpose Lubricant.
Last reviewed July 31, 2026
TL;DR This squeeze-tube penetrant has a safety data sheet that classifies nothing, plus a confirmed negative Prop 65 disclosure. But its own label carries a warning the SDS doesn't: it causes skin irritation and may cause an allergic reaction. About 85-89 percent of the formula is undisclosed, and this newer brand's real-world performance isn't independently verified yet.
It works into rusted or seized metal joints, breaking the rust's grip so a stuck fastener can turn, then leaving a protective film. It ships in a squeeze tube, so you drip it on rather than misting it. The manufacturer claims deep penetration and freeze resistance, unconfirmed independently.
A reasonable pick for a small, American-made penetrant in a precise drip format instead of an aerosol can. Weaker for a deeply recessed bolt, where an aerosol with an extension straw reaches better; for buyers wanting an independent track record this newer brand hasn't built; and for anyone with sensitive skin, given the label's own irritation warning.
The hosted SDS classifies this product as not hazardous, with no signal word and no hazard codes for eyes, skin, or lungs. But the label carries a warning the SDS doesn't: "Causes skin irritation. May cause an allergic skin reaction." CarCareTruth treats a printed label warning as real evidence even when the SDS stays silent, so skin protection is recommended here; eyes and lungs stay situational. The SDS names only one ingredient by concentration; the rest is undisclosed "Proprietary Material." Fish toxicity testing showed no harm at the water solubility limit, and volatile content under 0.1 percent keeps VOC emissions negligible; biodegradability falls just short of the usual pass threshold.
No. The product carries no Prop 65 warning on its Amazon listing, and its safety data sheet includes an explicit statement that it contains no components on California's Proposition 65 list at reportable levels. The one specific ingredient the manufacturer discloses, a synthetic ester lubricant base, is also confirmed absent from the current Prop 65 list, so all three signals agree.
The safety data sheet classifies the product as not hazardous, with no signal word and no hazard codes for eyes, skin, or lungs, and its general precautions section names gloves, eye protection, and ventilation as standard handling advice. But the retail bottle's own label carries a hazard warning the safety data sheet doesn't: it states the product causes skin irritation and may cause an allergic skin reaction. CarCareTruth weighs that printed label warning as real evidence rather than dismissing it because the safety data sheet is silent, so skin protection is listed as recommended here; eyes and lungs stay at the lighter situational tier tied to the safety data sheet's general precautions.
Not entirely. The hosted safety data sheet, last revised in September 2023, classifies the whole product as 'not classified' with no signal word and no skin-hazard code. But the retail bottle's own label prints a warning the safety data sheet doesn't carry: 'Causes skin irritation. May cause an allergic skin reaction. Read precautions on back.' CarCareTruth treats a printed label warning as real evidence even when the safety data sheet stays silent on it, which is why this page lists skin protection as recommended rather than repeating the safety data sheet's clean classification without qualification.
It ships in a squeeze tube, not an aerosol can, so it's applied by drip or direct squeeze onto the fastener rather than misted on from a distance. That gives more control over where the oil lands and less overspray, though it also means it can't reach a deeply recessed bolt the way a thin aerosol extension straw can.
The safety data sheet describes the base oil as inherently biodegradable, but its own elimination-test results fall just short of the threshold typically used to confirm a readily biodegradable formula, so that status is unconfirmed rather than a pass. Separately, the SDS reports low aquatic toxicity, low bioaccumulation potential, and volatile content under 0.1 percent, so VOC emissions are effectively negligible.
It's a genuine small American manufacturer based in Canal Winchester, Ohio, but a newer, lower-volume brand without the decades of independent garage-forum and lab-test history that some legacy penetrating oils have built up. Its safety data sheet is publicly hosted and names one ingredient by CAS number, which is real transparency, but roughly 85-89 percent of the formula is disclosed only as 'Proprietary Material,' and the retail label carries a skin-irritant warning the safety data sheet doesn't. Real-world penetration and rust-prevention performance for this specific product isn't yet backed by independent long-term reports either.
Marketing copy from Made Here Co., via Amazon. Not editorial.
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