Automotive SCR System Protective Agent 150ml Diesel Exhaust Fluid Additive for DPF and Catalytic Converter Maintenance with Dredging Cleaner
Automotive SCR System Protective Agent for Diesel Engines – 150ml Dredging Cleaner

This automotive SCR system protective agent is formulated to maintain the efficiency of diesel exhaust fluid (DEF) systems in modern diesel vehicles. Over time, deposits can form in the SCR injector, DPF, and catalytic converter, leading to reduced performance and increased emissions. This product uses a blend of dimethyl ether and diethyl ether to dissolve these deposits, helping to restore proper flow and protect sensitive components. Supplied in a convenient 150ml bottle, it is easy to add during routine maintenance. Whether you are a fleet operator or a private owner, this protective agent offers a straightforward way to support your vehicle's emissions control system.
Features and Construction
This protective agent is built around a solvent-based formula that targets common deposit types found in SCR systems. The simple, single-component design makes it suitable for DIY maintenance with minimal equipment.
Material and Build
The formula contains dimethyl ether and diethyl ether, both of which are effective solvents for organic residues and light carbon deposits. These ingredients are chosen for their ability to dissolve blockages without leaving sticky residue behind. The product is supplied in a standard 150ml plastic bottle with a secure cap, ensuring safe storage and easy handling.
Size and Practical Fit
The 150ml capacity is designed for single-dose application in most passenger car and light commercial vehicle SCR systems. It fits conveniently into the DEF tank opening, and the bottle size prevents over-dosing. Users should confirm compatibility with their vehicle's DEF system capacity before use.
Uses and Placement
This product is intended for use in the diesel exhaust fluid (DEF) circuit of vehicles equipped with Selective Catalytic Reduction (SCR) technology. It is suitable for both periodic maintenance and as a response to early signs of deposit build-up.
Vehicle Maintenance
Regular application can help prevent injector nozzles from becoming clogged with crystallised deposits, which is a common issue in SCR systems. By keeping the DEF fluid path clear, the product supports consistent NOx reduction and helps avoid costly repairs or component replacement.
Fleet and Commercial Use
For fleet operators, maintaining SCR system cleanliness is essential for meeting emissions standards and avoiding downtime. This protective agent can be added during scheduled service intervals to minimise deposit accumulation across multiple vehicles, reducing overall maintenance costs.
Benefits and Buying Value
Using a dedicated SCR protective agent offers practical advantages over generic fuel additives. This product targets the specific deposit chemistry found in DEF systems, providing focused cleaning without unnecessary ingredients.
Reuse and Low Maintenance
The 150ml bottle is designed for one-time use per treatment, eliminating the need for measuring or mixing. The fast-acting solvent formula works quickly, so drivers can notice improved system performance within a short period of driving after application.
Why Choose This Product
This protective agent offers a targeted solution for a common diesel engine issue at an accessible price point. Its simple application process and focus on deposit removal make it a practical choice for anyone looking to extend the life of their SCR system without complicated procedures.