Priced as of May 12, 2026
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Prices may varyFrom the Safety Data Sheet
Full SDS ↗ (rev. 2024-04-30)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.
EyesRequiredMfr. SDS §8 · 29 CFR 1910.133(a)(1) · GHS H318SkinRequiredMfr. SDS §8 · 29 CFR 1910.132 · GHS H314LungsRecommendedMfr. SDS §8Ventilation—No PPE in published sourcesShow details for all categories ▾Hide details ▴
From the manufacturer’s Safety Data Sheet, Section 8
“This formula causes serious and potentially permanent eye damage on contact — the SDS classifies it as Eye Damage Category 1. Eye protection is required for any handling of the concentrate.”
— Gyeon
U.S. regulatory standard
29 CFR 1910.133(a)(1); 1910.151(c)
“The employer shall ensure that each affected employee uses appropriate eye or face protection when exposed to eye or face hazards from… liquid chemicals, acids or caustic liquids…”
ANSI Z87.1 (chemical splash protection — 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.
From the manufacturer’s Safety Data Sheet, Section 8
“This formula causes skin corrosion and severe burns at concentrate strength — the SDS classifies it as Skin Corrosion Category 1. Nitrile gloves are required when pouring or handling the concentrate.”
— Gyeon
U.S. regulatory standard
29 CFR 1910.132; 1910.133; 1910.138; 1910.151(c)
“Where the eyes or body of any person may be exposed to injurious corrosive materials, suitable facilities for quick drenching or flushing of the eyes and body shall be provided within the work area for immediate emergency use.”
ANSI Z87.1 (eye/face — 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.
From the manufacturer’s Safety Data Sheet, Section 8
“No respiratory irritation H-code at the mixture level. The d-limonene ingredient at <1% is an asthmagen, and foam-cannon outdoor application generates low-velocity mist. The ingredient chemistry translates to a recommended precaution for users with asthma or respiratory sensitivity.”
— Gyeon
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.
CarCareTruth's Analysis
Last reviewed May 15, 2026
TL;DR A genuine alkaline snow foam concentrate that visibly lifts road film during a 4–6 minute dwell — community confirms it reduces contact-wash effort at 1:10 dilution. The DANGER label is real: this is corrosive at concentrate strength, causing serious burns and permanent eye damage on contact. Wear nitrile gloves and safety goggles when pouring.
What it is and how it performs
Dilute 1:5 for heavy grime or 1:10 to 1:15 for routine maintenance, apply via foam cannon, and dwell three to five minutes before rinsing. Verified-purchase reviewers consistently describe thick foam that clings to vertical panels and drips road film freely on rinse — the product delivers on its core function. Community reviews on ceramic-coated vehicles confirm no stripping incidents at labeled dilution. The honest gap: heavy insect protein and baked tar do not clear reliably — a dedicated pre-treatment is needed first.
Who should buy this — and who should skip it
Right for enthusiasts doing regular washes on coated or waxed vehicles who want a foam-cannon pre-soak that reduces mitt-on-grit risk. Skip it if you need a working-dilution SDS for surface-compatibility documentation — the available data covers concentrate only. Also skip for heavy bug or tar contamination; a dedicated remover is the right first step.
Safety and environmental impact
The SDS assigns DANGER at concentrate strength — skin corrosion and serious eye damage on contact. Nitrile gloves and goggles are required when handling the undiluted product. The formula contains a trace asthmagen ingredient; users with asthma should work outdoors with airflow. This pre-wash is drain-destined; one ingredient carries aquatic toxicity, and formula biodegradability is undisclosed.
Frequently asked questions
Is Gyeon Q²M Foam safe on ceramic coatings?▾
Gyeon markets this product as 'Coating Maintenance' safe, and community reviews broadly confirm it does not strip Gyeon's own ceramic coatings at labeled dilution (1:10 to 1:15). The concentrate is strongly alkaline, so maintaining the correct dilution ratio matters — higher concentrations than 1:5 are not recommended on coated surfaces. No community reports of coating damage at labeled working dilution.
Why does the SDS say DANGER if the product is marketed as pH-neutral?▾
The DANGER classification and pH 13 in the safety data sheet reflect the concentrate as packaged, not the working-dilution product you spray on the car. Gyeon's pH-neutral claim on the label refers to the diluted solution at 1:10 or 1:15 — a claim that cannot be independently verified from the SDS because the working-dilution pH is not disclosed. CarCareTruth scores at concentrate because no dilution-specific safety data is available. At the labeled working dilution, the actual hazard profile is expected to be substantially lower.
What dilution ratio should I use in my foam cannon?▾
Gyeon recommends 1:5 for heavy soiling and 1:15 for light maintenance washes. Amazon verified-purchase reviewers confirm thick foam at 1:10 with standard foam cannon setups. A 1:15 ratio is commonly cited in community threads for coating-maintenance washes where minimal agitation is the goal.
Is there a 4 L refill available?▾
Yes. ASIN B01CESR1FW is the 4 L jug — the same formula at a lower cost-per-ounce than the 1000 mL bottle. Buy the jug if you use this as your primary pre-wash routine.
From the manufacturer
Marketing copy from Gyeon, via Amazon. Not editorial.
- •ULTIMATE PRE‑WASH FOAM – Clings to grime and dissolves loose dirt before hand washing to reduce swirl marks and preserve your paint surface during routine detailing.
- •PH NEUTRAL FORMULA – Delivers effective cleaning power while remaining safe for waxed, sealed, or ceramic coated surfaces without stripping existing protection.
- •SAFE ON ALL EXTERIORS – Suitable for paint, glass, trim, wheels and rubber. Safe for coated and uncoated finishes and compatible with all vehicle types.
- •FOAM CANNON READY – Produces thick, long-lasting suds using a foam cannon or foam gun, enhancing cleaning power without the need for contact during initial wash.
- •ADJUSTABLE DILUTION POWER – Customizable foam thickness with dilution ratios from 1: 5 for heavy dirt to 1:15 for light maintenance washes depending on contamination level.
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Manufacturer videos
Manufacturer images
Manufacturer specifications
- Brand
- Gyeon
- Item Form
- Foam
- Scent
- Quartz
- Specific Uses For Product
- Ceramic
- Material Feature
- Clean
- Surface Recommendation
- Metal, Plastic, Rubber
- Special Features
- PH Neutral
- Contains Liquid Contents?
- Yes
- Cleaning Agent Formulation
- Degreaser
- Material Features
- Clean
- Material Type Free
- Chlorine Free
- Item Volume
- 33.8 Fluid Ounces
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