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.
No Safety Data Sheet on file.
CarCareTruth has not received a Safety Data Sheet from the manufacturer for this product. Hazard classification and PPE cannot be cited. Request an SDS from the manufacturer before use.
This product ranks #7 of 17 in Ceramic Coating.Three above it ↓
Last reviewed June 29, 2026
TL;DR McKee's 37 graphene line runs 1-2 years on daily drivers per community data; the label's 5-year claim is not community-confirmed. No SDS has been located; safety data is not available, and the health score of 5.0 reflects that gap.
McKee's 37 Graphene Ceramic Coating bonds to paint, wheels, glass, and chrome, curing into a protective layer. Apply section by section with a suede applicator inside a 2-3 minute flash window, buff clean, then allow 6 hours before water contact. The manufacturer claims 5-year protection, but owners tracking the broader McKee's 37 graphene line report roughly 1.5 years on a daily driver (SVTPerformance, Chicago salt exposure). The anti-static and water-spot advantages the brand attributes to graphene chemistry are not confirmed by community comparisons to conventional ceramic coatings. The owner base for MKGC-140 specifically remains thin.
Best for experienced home detailers familiar with McKee's 37 products who want a wipe-on ceramic coating. Skip it if you need documented multi-year durability data or confirmed graphene advantages; products with larger independent review communities give you better data before committing. The tight flash window also makes this a poor fit for first-time coaters.
No SDS has been located for MKGC-140; safety data is not available for this product. The health score of 5.0 reflects the absence of safety data, not the product's actual chemistry. As a leave-on ceramic coating, the cured film bonds to the paint surface and does not reach the drain system in meaningful quantities.
The label claims 5 years, but community data tells a different story. McKee's 37 graphene-line owners on SVTPerformance report roughly 1.5 years of effective protection on a daily driver, including through Chicago salt-exposure winters. The specific MKGC-140 product has only a thin owner base, not enough to independently confirm multi-year durability beyond the broader brand line. Build expectations around the 1-2 year community range until more long-term independent follow-up accumulates for this product specifically.
No public SDS has been located for MKGC-140 as of May 30, 2026. McKee's 37 does not provide a public SDS portal; carcareco.com.au lists the product but has no SDS download link; msdsdigital.com confirms no McKee's 37 MKGC-series entries. The health score of 5.0 reflects this absence, not the product's actual chemistry. If you need an SDS for workplace compliance, the documented next step is a phone request to McKee's 37 at 1-844-852-5300 under OSHA HazCom 29 CFR 1910.1200 right-to-know rules for SKU MKGC-140.
No. The '10H hardness' claim is standard marketing language for graphene and ceramic coatings and has no independent community scratch-test verification for MKGC-140. The community review base is too thin for any scratch-resistance follow-up data. The hardness dimension is scored on what community evidence documents under actual use, not on manufacturer label claims; those carry zero scoring weight per the ceramic-coating rubric.
McKee's 37 markets MKGC-140 for paint, wheels, glass, and chrome. The product listing and brand site describe multi-surface use. There is no SDS to confirm chemical compatibility with specific substrates at a chemistry level, and the thin owner base does not contain enough detail to confirm community results on surfaces other than paint. The manufacturer's multi-surface claim is plausible for a wipe-on ceramic coating but remains unconfirmed by independent community data for MKGC-140 specifically.
Marketing copy from McKee's 37, via Amazon. Not editorial.
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