CarCareTruth Score
Decent, but wear gloves and ventilate.
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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 skin corrosion — classified as causing irreversible skin damage on contact.
GHS Category 1 eye damage — classified as causing irreversible eye damage on contact.
GHS Category 1 reproductive toxicity — classified as suspected of damaging fertility or harming an unborn child.
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
“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 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.
This product ranks #8 of 8 in Pre-Wash & Snow Foam.Three above it ↓
Last reviewed June 14, 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.
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. owners 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.
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.
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.
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.
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.
Gyeon recommends 1:5 for heavy soiling and 1:15 for light maintenance washes. owners 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.
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.
Marketing copy from Gyeon, via Amazon. Not editorial.
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