CarCareTruth Score
Decent, but wear gloves and ventilate.
Opens Amazon in a new tab. No account needed to look.
Saved to your guest loadout. Sign up to also save to your Cabinet (consumables) or Kit (tools you own).
As an Amazon Associate I earn from qualifying purchases. Full disclosure
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.
Show details for all categories ▾Hide details ▴
Beyond SDS: translated from the ingredient chemistry
The validate.ts pH-gate (Rule 19) forces eyes required at concentrate pH >= 12.0. The mixture-level SDS classification is H320 (Eye Irritation Cat 2B), which alone maps to recommended, but the pH-gate overrides this because strongly alkaline concentrate at pH 12.5-13.5 poses irreversible eye-damage risk on direct contact.
U.S. regulatory standard
29 CFR 1910.133(a)(1)
“appropriate eye or face protection when exposed to eye or face hazards from… liquid chemicals…”
ANSI Z87.1 (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.
Beyond SDS: translated from the ingredient chemistry
The validate.ts pH-gate forces skin required at concentrate pH >= 12.5. Mixture-level SDS classification is H315 (Skin Irritation Cat 2), which alone maps to recommended, but pH 12.5-13.5 at concentrate strength exceeds the threshold for corrosive-adjacent damage on prolonged contact.
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.
Only when: in enclosed space
Beyond SDS: translated from the ingredient chemistry
No respiratory H-code at mixture level (no H335, H331, H334). VOC is 0.00%. Lungs situational because spraying into an engine bay in a closed garage concentrates alkaline vapor at face height. Outdoors or with garage doors open, no inhalation protection is indicated by the SDS classification.
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.
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 #5 of 11 in Engine Degreaser.Three above it ↓
Last reviewed August 2, 2026
TL;DR Strongly alkaline concentrate (pH 12.5-13.5), so wear goggles and chemical-resistant gloves at full strength. Diluted, it's an EPA Safer Choice certified, water-based, zero-VOC degreaser that handles light-to-moderate engine grime with dwell time and a rinse, not a one-pass stripper for heavily neglected bays.
A concentrated alkaline cleaner for engine bays, garage floors, and general degreasing. Apply at working strength, let it dwell a few minutes, agitate stubborn spots with a brush, then rinse. It's highly rated on Amazon by a large owner base, but community data is owner reviews only, so the degreasing-power score stays provisional pending independent forum or video comparisons. A few reports note the rinse can leave floors slippery until fully rinsed.
Right for owners who want a versatile concentrate at a competitive price, EPA Safer Choice certified and zero-VOC, who don't mind gearing up to handle it at full strength. Skip it if one-pass removal of a heavily neglected bay is the priority, or if a strongly alkaline concentrate isn't appealing; a milder, pre-diluted spray is the easier alternative.
The SDS assigns no product-level signal word, but the mixture is classified for skin irritation (H315) and eye irritation (H320), and the concentrate's pH of 12.5-13.5 is strongly alkaline, so goggles and chemical-resistant gloves are the relevant protection at full strength; diluted solution is milder. Spraying into an enclosed engine bay concentrates vapor at face height, so work outdoors or with the garage door open. Environmentally this is among the strongest in the category: water-based, zero VOC, EPA Safer Choice certified, with no aquatic-toxicity classification.
Not without care. The SDS notes the formula slowly corrodes copper, aluminum, zinc, and galvanized surfaces, so rinse it off promptly rather than letting it dwell on bare metal trim or brackets. Painted and powder-coated surfaces aren't affected the same way. If your engine bay has exposed aluminum components, keep dwell time short and rinse thoroughly before it dries.
Both work. The label directs full strength for heavy-duty cleaning and a diluted mix for lighter, everyday tasks, which is part of why the 1-gallon concentrate stretches across multiple jobs. At full strength the concentrate is strongly alkaline (pH 12.5-13.5), so wear gloves and eye protection; diluted working solution is milder to handle.
Goggles and chemical-resistant gloves at full strength. The SDS classifies the mixture for skin irritation (H315) and eye irritation (H320), and the concentrate pH of 12.5-13.5 is strongly alkaline enough to justify both. Use it in a well-ventilated area or outdoors, since spraying into an enclosed engine bay concentrates vapor at face height.
It's among the cleanest formulas in the category on paper: water-based, zero VOC per the SDS, and EPA Safer Choice certified. Amazon's listing also describes it as biodegradable, but the SDS itself doesn't include the quantitative biodegradation data needed to confirm that claim, so treat the biodegradable label as a manufacturer claim rather than a verified fact.
Yes. It carries NSF A-1 certification, which covers surfaces where incidental food contact may occur, according to the product's Amazon listing. That's a food-service-adjacent certification rather than a food-contact-safe claim, so it doesn't change the PPE guidance for handling the concentrate itself.
Marketing copy from Krud Kutter, via Amazon. Not editorial.
Weekly pick
One product, one safety verdict, every week. No spam.
WD-40
Specialist Industrial-Strength Cleaner & Degreaser
Chemical Guys
Signature Series Orange Degreaser
Simple Green
Pro HD Heavy-Duty Cleaner & Degreaser
Purple Power
Industrial Strength Cleaner/Degreaser
As an Amazon Associate I earn from qualifying purchases. Full disclosure
Community
0 postsShare how you use this product
Drop a quick comment or post a full review with photos and a star rating.
Sign in to postNew here? Create a free account.