CarCareTruth Score
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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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From the manufacturer’s Safety Data Sheet, Section 8
“SDS Section 8 lists eye/face protection as 'None required' for normal use, and Section 2 carries no eye-hazard GHS code. Basic eye protection is still a sensible precaution when handling concentrate before dilution.”
— Meguiar's
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
“SDS Section 8 recommends gloves made of polymer laminate, selected based on an exposure assessment, and Section 11 reports mild skin irritation (localized redness, swelling, itching, dryness) is possible on contact. Section 2 carries no skin-hazard GHS code, but the SDS's own glove recommendation plus a documented irritation pathway support gloves for routine use.”
— Meguiar's
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
“SDS Section 8 lists respiratory protection as 'None required' for normal use, but Section 8.2.1 calls for respiratory protection if ventilation is inadequate, and Section 6 flags mechanical ventilation for spills in confined spaces. Most relevant when handling concentrate in an unventilated garage.”
— Meguiar's
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 #9 of 21 in Car Shampoo.Three above it ↓
Last reviewed May 30, 2026
TL;DR Cleans road film reliably in a standard two-bucket wash, produces good foam, and the broad owner consensus confirms it does not strip wax or sealant at normal dilution. The formula is fully proprietary with no ingredient disclosure. The current product listing carries a California Prop 65 warning.
Deep Crystal Car Wash lifts dirt and road contamination at 1 oz per gallon (1:128 dilution) using a proprietary cleaning formula that Meguiar's has offered since 2001. Add it to a wash bucket or foam cannon reservoir and it produces dense, clinging suds that lubricate the wash mitt through a full-car wash. Owners consistently describe clean results on weekly-washed daily drivers · foam volume, grease-cutting action, and a residue-free rinse are the most commonly cited strengths. It is a maintenance shampoo: effective on routine accumulation but not a substitute for a dedicated strip wash before paint protection work.
Strong fit for owners doing routine maintenance washes on waxed or sealed paint who want a proven, widely available shampoo. The long track record and broad, consistent owner feedback make it a low-risk choice. Skip it if you need a strip wash before applying a new wax or coating · a purpose-built strip shampoo is the right tool for that job. Skip it also if ingredient transparency matters to you: the SDS names no individual components, making independent surface-compatibility or environmental cross-checks impossible.
The SDS carries no GHS signal word and classifies the product as not hazardous · no H-codes and no GHS pictograms. Section 8 recommends polymer laminate gloves for skin contact (Section 11 notes mild skin irritation is possible) and lists eye and respiratory protection as not required for normal use, though basic eye protection and ventilation are sensible precautions when handling concentrate. At the 1:128 working-solution dilution, the formula is near-neutral pH. The California Prop 65 warning on the current product listing is acknowledged; the 2017 SDS Section 15 defers to the manufacturer and does not identify a specific listed substance. The formula is drain-destined with a VOC load of 3 g/L (well below environmental thresholds); SDS Section 12 reports no aquatic toxicity data and defers to the manufacturer for ecotoxicological information. No biodegradability confirmation is available from the SDS.
Broad owner feedback consistently confirms the formula does not strip wax or sealant at normal wash dilution. Meguiar's explicitly markets it as a product that 'preserves wax protection,' and the SDS reports a pH of 7.5 at concentrate · near-neutral · which at the 1:128 working solution approaches neutral water. It is a maintenance shampoo, not a strip wash.
Community reviews confirm the formula does not strip wax or sealant, and the near-neutral pH at working dilution is consistent with ceramic-coating-safe behavior. However, no ceramic-coating-specific confirmation (brand TDS, independent detailer test on coated paint) was found during research. If coating compatibility documentation is required, check with your coating manufacturer.
The label recommends 1 oz per gallon of water (1:128 dilution) for a standard two-bucket wash. At this dilution, the formula's near-neutral pH is well within the safe range for painted surfaces and protection layers.
Yes. The current product listing carries a California Prop 65 warning. The 2017 SDS Section 15 defers entirely to the manufacturer for Prop 65 information and does not identify a specific listed chemical. The product listing flag is treated as authoritative for the current product state. The most likely basis is a trace from common surfactant manufacturing byproducts, but the specific substance is not disclosed in available documentation.
Both are pH-balanced Meguiar's maintenance shampoos at similar dilution ratios. Deep Crystal is marketed as the 'deep cleaning' line with a focus on removing contaminants before they bond; Gold Class includes conditioning agents aimed at paint gloss enhancement. Both are wax-safe at working dilution. Neither has EPA Safer Choice certification or carries an openly disclosed ingredient list.
Marketing copy from Meguiar's, via Amazon. Not editorial.
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