NOCO NCP2 M401 Battery Terminal Cleaning Kit
CarCareTruth Score
Decent.
Priced as of May 31, 2026
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Prices may varyAbout 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.
From the Safety Data Sheet
Full SDS ↗ (rev. 2015-05-20)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.
EyesRecommendedMfr. SDS §8SkinSituationalMfr. SDS §8LungsSituationalMfr. SDS §8 · 29 CFR 1910.134 · GHS H373Ventilation—No PPE in published sourcesShow details for all categories ▾Hide details ▴
From the manufacturer’s Safety Data Sheet, Section 8
“The NCP2 preventative spray in this kit carries H319 (serious eye irritation Cat 2A). Both chemical components are used in the same work session. H319 on the secondary component is sufficient chemistry basis to recommend eye protection for the session.”
— NOCO
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
“E403 cleaner has no H315 at mixture level. Direct hand contact with dissolved corrosion slurry during the wipe/rinse step contains lead sulfate residue — skin protection appropriate when handling the terminal area after spraying.”
— NOCO
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
“E403 cleaner has no H335 at mixture level. Aerosol delivery in a semi-enclosed engine bay warrants ventilation awareness. H373 (STOT RE Cat 2) is confirmed at mixture level for the cleaner — for seasonal home-mechanic use, single-application acute risk is low, but the organ-toxicity basis elevates tier above not_needed. The NCP2 preventative component carries H335 and H332 — use in ventilated area especially when applying the preventative.”
— NOCO
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.
The Podium · Top 3 in Battery Terminal Cleaner
See the full ranking →This product ranks #3 of 9 in Battery Terminal Cleaner.
- Gold · #1NOCOE404 Battery Terminal Cleaner and Acid DetectorCCT 7.5
- Silver · #2CRCBattery Cleaner with Acid Indicator (11 oz)CCT 7.2
- Bronze · #3You're hereNOCONCP2 M401 Battery Terminal Cleaning KitCCT 7.0
CarCareTruth's Analysis
Last reviewed May 31, 2026
TL;DR Solid all-in-one kit — baking-soda cleaner handles routine buildup without a wire brush, and the anti-corrosion washers keep it from coming back. Wear safety glasses: the preventative spray in this kit has an eye irritation classification. A Prop 65 warning and one hazard in the cleaner trace to an undisclosed ingredient.
What it is and how it performs
Spray the cleaner on corroded terminals, let it fizz, rinse off, then brush with the included metal brush. Seat the felt anti-corrosion washers over the posts and apply the preventative spray before reconnecting. The broad owner consensus confirms reliable performance on routine terminal corrosion: owners describe terminals that were causing starting problems returned to normal service. No color-change indicator, so judge completion by clean posts after rinsing.
Who should buy this — and who should skip it
The right buy for a home mechanic who wants a complete terminal cleaning solution in one package. Skip it if terminals have years of thick crusty buildup — that level of corrosion often needs wire brushing regardless of cleaner — or if you already have anti-corrosion compound on your terminals and only need the cleaner.
Safety and environmental impact
DANGER is from the flammable propellant in both cans, not the cleaning chemistry. Wear safety glasses: the preventative component has an eye irritation classification from its solvent-based formula. One organ-toxicity hazard and the Prop 65 warning in the cleaner trace to the undisclosed ingredient fraction — use in a ventilated area and keep ignition sources clear. Propellant-only VOC; no aquatic toxicity codes in the cleaner SDS.
The corrosion dissolved from battery terminals contains lead sulfate — wash hands after handling the dissolved slurry and keep rinse water out of storm drains.
Frequently asked questions
Is NOCO NCP2 M401 Battery Terminal Cleaning Kit safe to use?▾
The Safety Data Sheet for NOCO NCP2 M401 Battery Terminal Cleaning Kit carries a DANGER signal word, with classified hazards including H222 (extremely flammable aerosol); H280 (contains gas under pressure; may explode if heated); H373 (may cause damage to organs through prolonged or repeated exposure). The Amazon listing also carries a California Prop 65 warning. See the PPE breakdown above for use-case-specific guidance translated from the SDS hazard codes.
How does NOCO NCP2 M401 Battery Terminal Cleaning Kit score on CarCareTruth?▾
CarCareTruth scores NOCO NCP2 M401 Battery Terminal Cleaning Kit at 7.0 out of 10 on the composite CCT score, with a health sub-score of 6.3/10. 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.
What's in NOCO NCP2 M401 Battery Terminal Cleaning Kit?▾
Per the Safety Data Sheet ingredient disclosure: E403 Battery Cleaner (primary): Butane (CAS 106-97-8) 6.8%, Sodium Bicarbonate (CAS 144-55-8) 5.6%, Propane (CAS 74-98-6) 3.1%; ~84.5% not disclosed; 3.1% fraction classified as unknown toxicity in SDS §3 (2015). NCP2 Corrosion Preventative (secondary, leave-on): Paraffin oil (CAS 64742-62-7) 33.8%, Acetone (CAS 67-64-1) 20.0%, Propane (CAS 74-98-6) 15.0%, Xylene (CAS 1330-20-7) 12.7%, MEK (CAS 78-93-3) 10.0%, Ethylbenzene (CAS 100-41-4) 2.3%; 55% unknown toxicity fraction.
From the manufacturer
Marketing copy from NOCO, via Amazon. Not editorial.
- •All-In-One - The ultimate battery terminal cleaning kit provides all the tools to clean and protect your battery from battery corrosion.
- •Stops Battery Corrosion - Stops corrosion for the life of your battery, making all surfaces impenetrable to corrosion-causing acid fumes.
- •Easy to use - Instantly neutralizes, dissolves, and removes battery corrosion - simply spray-on and rinse-off.
- •Improved Performance - Eliminates battery corrosion to avoid poor electrical connections and current flow for increased cranking ability.
- •Proven Formula - The original corrosion preventative since 1914, used by the pros, billions of world-wide applications, and made in the USA.
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Manufacturer videos
Manufacturer images
Manufacturer specifications
- Manufacturer
- NOCO
- Brand
- NOCO
- Model
- M401S
- Item Weight
- 6.9 ounces
- Product Dimensions
- 6 x 4 x 8 inches
- Item model number
- M401S
- Manufacturer Part Number
- M401
- OEM Part Number
- M401
- Special Features
- Does Not Dry or Evaporate, Made in the USA, Oil-Based Formula, Stops Battery Corrosion
- ASIN
- B009LWZPAI
- Customer Reviews
- 4.6 4.6 out of 5 stars (746) 4.6 out of 5 stars
- Best Sellers Rank
- #27,578 in Automotive (See Top 100 in Automotive) #52 in Electrical System Tools
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