Rislone DEF Crystal Clean™ Diesel DEF Medic+™®

Rislone® DEF Crystal Clean™ Diesel DEF Medic+
Item No.: 44784 | 350 ml (6 pcs. per carton)

A patented cleaning agent for diesel vehicles with an SCR (Selective Catalytic Reduction) system. Dissolves and removes white urea crystals throughout the entire DEF/AdBlue system, including the tank, pump, heater, sensors, lines, and injector. The product restores performance and prevents faults that lead to increased fuel consumption and reduced engine power.

Benefits:

• Cleans and restores the entire SCR/DEF system

• Dissolves white urea crystals in the DEF tank and components

• Prevents limp mode (reduced power / limp mode)

• Safe for all types of DEF/AdBlue® systems

• Restores optimal spray pattern in the injector

• Compatible with all approved DEF fluids:
  AdBlue®, Arla 32, AUS 32, BlueHDi, BlueTEC®, Cummins®, Duramax®, EcoDiesel®, PowerStroke®, TDI® and others.

• Prevents costly repairs and extends system life

• Clears fault codes such as: P20EE, P20EF, P204F, P207F, P20E8, P218F

Applications:

Especially useful for vehicles that:

• Are driven at low speeds, on short distances, or with low loads

• Have frequent stops and starts

• Show fault codes related to SCR/DEF

• Have reduced engine power or DEF fault warnings

Instructions:

• Add only to the DEF/AdBlue tank (not to the fuel tank!)

• Passenger cars (10–20 L tank): ½ bottle

• Light commercial vehicles (20–40 L tank): 1 bottle

• Heavy vehicles (40 L+): 1 bottle per 40 liters

• Can be added directly to an almost full DEF tank, or topped up with DEF

• If the light is still on after 400 km, a new treatment may be necessary

About the SCR system:

SCR (Selective Catalytic Reduction) uses DEF/AdBlue (urea + water) to reduce NOx emissions to nitrogen, water, and small amounts of CO₂. The system consists of:

• DEF tank, filler port, and cap

• Tank heater and level sensor

• DEF pump, filter, lines, and injector

• Dosing module, mixing chamber, SCR catalyst

• NOx sensors and possibly Ammonia Slip Catalyst (ASC)

Typical problems leading to crystallization:

• Leakage or air in the system

• Overfilling of DEF tank

• Improper storage (exposure to heat/sunlight)

• Poor quality DEF (incorrect urea-water ratio)

• Contamination of the system with diesel or other fluids

Common fault codes explained:

• P20EE: SCR catalyst inefficient (high NOx emissions)

• P20EF: DEF injection valve stuck

• P20E8: DEF system pressure too low

• P204F: Reduction system performance degraded

• P207F: DEF quality problem

• P218F: No flow in DEF system