Berryman B-12 Chemtool Thru-Rail Injector Cleaner Fuel System Treatment
Saved to your guest loadout. Sign up to also save to your Cabinet (consumables) or Kit (tools you own).
As an Amazon Associate and affiliate partner, CarCareTruth earns from qualifying purchases. Full disclosure
Prices may varySerious hazard — read before use
The 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.
- H360 “May damage fertility or the unborn child.”
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.
The Podium · Top 3 in Fuel System Cleaner
See the full ranking →This product ranks #6 of 7 in Fuel System Cleaner.Three above it ↓
CarCareTruth's Analysis
Last reviewed May 25, 2026
TL;DR DANGER-classified professional solvent formula — the primary active is a reproductive toxicant (H360, Prop 65 listed) with a health-driven DANGER signal word, not just flammability. Bypasses the fuel tank entirely, delivering concentrated solvent directly to injectors, intake valves, and combustion chambers via a professional thru-rail service kit. Wear gloves and safety glasses.
What it is and how it performs
Professional-service product, not a DIY shelf item. A technician connects it to the vehicle's fuel rail service port via dedicated cleaning equipment, runs the engine on undiluted solvent concentrate, bypassing the fuel tank entirely. That delivery achieves far higher concentrations at the injectors than any pour-in additive. The powerful solvent blend targets hardened carbon buildup on injector tips, intake valve backs, and combustion chamber walls — the three zones Berryman claims. Active chemistry is confirmed from the SDS, but no independent test data corroborates the multi-system claim.
Who should buy this — and who should skip it
Right buyer is a professional mechanic or experienced DIYer with a compatible thru-rail cleaning system and service fittings. Fits when engine symptoms — rough idle, sluggish throttle, increased fuel consumption — warrant a direct high-concentration solvent treatment. Skip it if you need a pour-in tank additive — this isn't that. Skip it if you have a GDI engine until Berryman resolves the label/SDS conflict. Consistent Top Tier fuel users are unlikely to need this level of intervention.
Safety and environmental impact
DANGER signal word — health-driven: H360 (reproductive toxicant) and H302 (harmful if swallowed), plus H225 (extremely flammable). SDS-derived PPE: safety glasses (H319), nitrile gloves for splash risk (H315), respiratory protection recommended for shop use given H335 and high-VOC vapor. Do not induce vomiting if ingested — seek medical attention. The product combusts in the engine; exhaust byproducts are the environmental endpoint.
Frequently asked questions
Is Berryman B-12 Chemtool Thru-Rail safe for GDI (gasoline direct injection) engines?▾
There is a direct conflict between the product label and the SDS. The current label features a 'GDI SAFE & EFFECTIVE' badge on the front. However, SDS Section 1 (Uses Advised Against) states 'not for use in gasoline direct injection or diesel applications.' The SDS was issued in 2015, when GDI engines were becoming mainstream — it is possible the SDS was not updated after Berryman's GDI testing was completed. CarCareTruth treats GDI compatibility as unconfirmed until Berryman resolves the contradiction. If you have a GDI engine, contact Berryman directly for current technical guidance before use.
What does 'thru-rail' mean — how is this product used?▾
'Thru-rail' means the product is delivered directly to the fuel rail and injectors via professional service equipment — it bypasses the fuel tank entirely. This is a professional-channel product designed for use with dedicated thru-rail injector cleaning machines (fuel rail service kits), not a pour-in fuel additive. A technician connects the product to the fuel rail service port, runs the engine on the cleaner concentrate for a defined cleaning cycle, then restores normal fuel supply. This delivery method achieves much higher local concentrations at the injector than tank-based additives.
Is this the same as the regular Berryman B-12 Chemtool pour-in additive?▾
No. The B-12 Chemtool line includes multiple products with different delivery methods and use cases. The Thru-Rail Injector Cleaner (Part 1126) is formulated for professional thru-rail delivery and is not a pour-in tank additive. The PFIC-DP blend code is specific to this product. Check the part number on the label — 1126 is the 16 oz Thru-Rail product.
Why does this product carry a DANGER signal word?▾
The DANGER signal word is driven by H360 (reproductive toxin Cat 1B) from NMP (N-methyl-2-pyrrolidone) and H302 (harmful if swallowed) — both confirmed at the SDS §2 mixture level. The product also carries H225 (extremely flammable), which is a physical-hazard code and does not contribute to the DANGER classification for health scoring purposes. NMP is a powerful dissolving solvent that is also a California Prop 65 substance as a developmental toxicant. The SDS was issued in 2015, predating more recent NMP regulatory actions.
Why is this product currently out of stock?▾
The Amazon listing shows 'Currently unavailable' as of the scoring date (May 2026). Availability may change — check the listing directly. This is a professional-channel product with narrower distribution than consumer pour-in additives, which may explain periodic availability gaps.
From the manufacturer
Marketing copy from Berryman, via Amazon. Not editorial.
- •Deep Injector Cleaning – Dissolves carbon buildup, varnish, and gum to restore optimal fuel system performance.
- •Boosts Fuel Efficiency & Power – Improves injector spray patterns for smoother acceleration and better mileage.
- •Prevents Clogging & Rough Idling – Keeps injectors free of harmful deposits, ensuring reliable and consistent engine operation.
- •Safe for All Gasoline Engines – Works with cars, trucks, motorcycles, boats, and small engine equipment.
- •Convenient 16 oz. Pour Can – Easy-to-use container for hassle-free fuel treatment and routine engine maintenance.
Weekly pick
One product, one safety verdict, every week. No spam.
Manufacturer videos
Manufacturer images
Manufacturer specifications
- Manufacturer
- Berryman Products
- Brand
- Berryman
- Model
- 1126
- Item Weight
- 1.2 pounds
- Product Dimensions
- 2.63 x 2.63 x 7.5 inches
- Item model number
- 1126
- Manufacturer Part Number
- 1126
- ASIN
- B00HFL4S5U
- Customer Reviews
- 4.5 4.5 out of 5 stars (26) 4.5 out of 5 stars
- Date First Available
- February 18, 2015
More from Berryman
More in Fuel System Cleaner
Gumout
Multi-System Tune-Up
CCT 6.8 · DecentHealth 8.5
BG Products
44K Platinum Fuel System Cleaner
CCT 5.9 · DecentHealth 1.1
Hot Shot's Secret
Gasoline Extreme (GE16Z)
CCT 5.8 · DecentHealth 2.5
STP
Ultra 5 in 1 Fuel System Cleaner
CCT 5.7 · DecentHealth 4.0
As an Amazon Associate and affiliate partner, CarCareTruth earns from qualifying purchases. Full disclosure
Community
0 postsShare how you use this product
Drop a quick comment or post a full review with photos and a star rating.
Sign in to postNew here? Create a free account.
Top Amazon review
↗External — Amazon's most-helpful review for context.