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
“No H319 or H318 in SDS §2 · no irritant chemistry basis. DA pad splatter at operating speeds (3,000·6,500 OPM) creates a realistic incidental eye-contact route.”
— Menzerna
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 H315 or H317 in SDS §2. Routine skin contact loading the pad and wiping panels is the exposure pathway for repeated correction sessions.”
— Menzerna
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
“H373 STOT RE 2 from petroleum hydrocarbon carrier. Chronic code · not an acute inhalation irritant. Cumulative vapor exposure in an enclosed garage during multi-hour correction work is the relevant pathway.”
— Menzerna
U.S. regulatory standard
29 CFR 1910.134; 1910.138; 1910.1000
“the primary objective shall be to prevent atmospheric contamination…”
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
UN GHS hazard statement
H373“May cause damage to organs through prolonged or repeated exposure”
UN GHS Rev. 9 (2021)
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 #2 of 9 in Compound & One-Step.
Last reviewed May 28, 2026
TL;DR Menzerna HCC 400 removes moderate scratches and swirls in 2·3 DA passes · community testing confirms medium-heavy cut performance, and it finishes clean enough to go straight to a finishing polish. No CMIT/MIT asthmagen. Wear safety glasses for DA polisher work · pad splatter at speed is the realistic eye-contact route even without an irritant classification.
HCC 400 is Step 1 in Menzerna's 4-step correction system for moderate scratches, swirl marks, and light oxidation. Apply a pea-to-dime amount on a red heavy-cut foam pad, work at medium speed with moderate pressure until the film turns slightly translucent, then wipe off. Working time is forgiving; pad loading manageable for beginners. Community reviews confirm effective correction on OEM clear coats with DA and rotary polishers. The "400" is Menzerna's internal step number, not a grit rating · some buyers expect more aggressive cut than the formula delivers at DA speeds.
This fits a daily-driver owner correcting automatic-car-wash swirls or moderate surface scratches with a DA polisher at $16 for 8 oz. Skip it for deep sanding scratches (800-grit and heavier) · Meguiar's M105 or 3D ONE is more efficient at that severity.
WARNING signal word from H373 (STOT RE 2, petroleum hydrocarbon carrier vapor · chronic pathway) and H412 (aquatic chronic Cat 3). H373 is a chronic code, not an acute irritant; ventilation matters for multi-hour enclosed-garage sessions. No CMIT/MIT confirmed in SDS §3 · the asthmagen concern common in competing compounds is absent. Safety glasses are warranted during DA use due to pad splatter, not irritant chemistry.
The Safety Data Sheet for Menzerna Heavy Cut Compound 400 carries a WARNING signal word, with classified hazards including H373 (may cause damage to organs through prolonged or repeated exposure); H412 (harmful to aquatic life with long lasting effects). See the PPE breakdown above for use-case-specific guidance translated from the SDS hazard codes.
CarCareTruth scores Menzerna Heavy Cut Compound 400 at 7.1 out of 10 on the composite CCT score, with a health sub-score of 8.0/10. The CCT score blends real-world effectiveness, ingredient health impact pulled from the manufacturer's safety sheet, and environmental footprint against a published category rubric. See the methodology link on this page for the full scoring breakdown.
Per the Safety Data Sheet ingredient disclosure: Per EU SDS §3 (2019-07-23, Version 5): Distillates (petroleum), hydrotreated light paraffinic (CAS 64742-55-8) 5·20%; Hydrocarbons, C10-C13, n-alkanes, isoalkanes, cyclics, aromatics (2-25%) ≥2.5·<10%; Hydrocarbons, C10, aromatics, <1% naphthalene (CAS 918-811-1) 2.5·10%. Abrasive mineral not disclosed (proprietary). No CMIT/MIT (CAS 55965-84-9, 26172-55-4, or 2682-20-4) confirmed in SDS §3. US back-of-bottle label ingredient list not accessible · no US SD…
Marketing copy from Menzerna, via Amazon. Not editorial.
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Currently in the top 2 of its category — appears as a pick in:
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