Rislone DEF Clean AdBlue System Cleaner

Use When You Notice…

• SCR or DEF warning light on the dashboard: Crystallisation blocks DEF liquid flow and triggers fault codes — this AdBlue system cleaner dissolves the blockage before it becomes a costly workshop visit.
• Vehicle entering limp mode unexpectedly: A restricted DEF system forces the ECU into limp mode; restoring clean flow can clear the condition without an expensive dealer repair.
• White crusty deposits around the blue DEF filler cap: Visible urea residue signals heavy crystallisation forming inside lines and the pump — act before the pump seizes.
• DEF pump sounding strained or consumption irregular: Partial blockages make the pump overwork and skew concentration readings, accelerating wear and wasting your DEF liquid.
• After long highway runs in peak summer heat: Elevated temperatures accelerate urea crystal formation in idle tanks — preventive dosing after every long haul keeps the system clean.

Key Benefits

• Crystal Dissolution: Breaks down biuret and cyanuric acid deposits that no amount of fresh AdBlue alone can clear.
• Fault Code Prevention: Restores correct DEF concentration and flow so the ECU sees accurate readings and stays out of limp mode.
• All-Season Performance: Conditions DEF liquid for reliable dosing whether your vehicle is idling in 45°C Delhi traffic or cold-starting at 2°C in Chandigarh.
• SCR Catalyst Protection: Ash-free formula introduces nothing that can poison the selective catalytic reduction catalyst or block the DPF.
• Cost Saving: At a fraction of the cost of SCR pump or injector replacement, regular AdBlue cleaning is the smartest maintenance spend on any BS-VI diesel vehicle.

The Technology Inside

Rislone DEF Clean uses a concentrated blend of ash-free urea-compatible surfactants and crystal-modifying agents that penetrate and break apart stubborn urea deposit structures — specifically biuret and cyanuric acid, the two crystalline by-products formed when AdBlue is exposed to heat cycling or slow evaporation. Once dissolved, these deposits are held in suspension and safely dosed through the SCR injector without harming the vanadium or zeolite catalyst substrate. The formula also conditions the AdBlue solution's surface tension, improving atomisation quality at the dosing nozzle — a critical factor during cold North India mornings when DEF viscosity is at its highest. No phosphorus, sulphur or metallic ash compounds are present, so DPF-equipped BS-VI vehicles remain fully protected.

Dosage & Coverage

Add approximately 30 ml (1 oz) per 38 litres (10 gallons) of DEF capacity directly into the blue-capped AdBlue filler only — never into the diesel fuel tank or engine oil. Use a double dose when heavy crystallisation or an active SCR fault code is already present. For preventive AdBlue cleaning, dose with every second or third DEF top-up, or at every fill if operating in extreme heat or cold.

Compatibility

Safe to use with

• All BS-VI (Euro 6) diesel vehicles using ISO 22241-compliant AdBlue/DEF liquid
• Trucks, buses and commercial vehicles with SCR after-treatment — Tata Prima, Ashok Leyland, Force Motors
• BS-VI passenger SUVs and MPVs with AdBlue systems — Mahindra TUV300 Plus and similar
• DPF-equipped vehicles — ash-free formula is fully DPF-safe

Not suitable for

• Do not add to the diesel fuel tank or engine oil — DEF/AdBlue tank only
• Cannot repair physically damaged SCR catalyst, cracked DEF lines or failed sensors
• Not a substitute for replacing contaminated or degraded AdBlue liquid

Why It Matters in India

Indian BS-VI commercial vehicles covering long highway distances in Rajasthan, Punjab and UP face some of the most aggressive DEF crystallisation conditions in the world — intense daytime heat followed by cold overnight temperatures create repeated heat cycles that accelerate urea deposit formation. Fleet operators running Tata Prima trucks or Ashok Leyland heavy vehicles often discover SCR fault codes only after a costly roadside breakdown. A single SCR pump or dosing injector replacement can run ₹25,000–₹1,50,000 at an authorised service centre, making regular AdBlue system cleaning one of the highest-return preventive maintenance habits a fleet manager or owner-driver can build. Clean DEF flow also supports cleaner exhaust, helping vehicles pass PUC emission checks and stay clear of NGT-related notices.

How To Use

1. Check your DEF tank capacity using the dosage chart printed on the bottle label.
2. Pour the measured amount directly into the blue-capped AdBlue/DEF filler — not the diesel tank.
3. Use a double dose if white crystalline deposits or active SCR fault codes are already present.
4. Top up with fresh ISO 22241 AdBlue liquid and drive normally to allow full circulation.

Safety Note: AdBlue is corrosive to skin and paintwork — rinse spills immediately with clean water. Store the product away from direct sunlight and above 0°C.

Frequently Asked Questions

Can this product clear existing SCR fault codes on my BS-VI vehicle?

If the fault code is caused by DEF crystallisation blocking flow or corrupting concentration sensor readings, dissolving the crystals with this AdBlue system cleaner can allow the code to clear after a drive cycle. Fault codes caused by physical catalyst damage, a failed NOx sensor or cracked DEF lines will require mechanical inspection and repair.

How often should I use it to prevent crystal build-up?

As a preventive measure, add one dose with every second or third AdBlue top-up. If your vehicle operates in extreme heat — highway runs through Rajasthan in May or June — or cold starts below 5°C in North India winters, dose at every fill for best results.

Is it safe for Tata, Mahindra and Ashok Leyland BS-VI vehicles?

Yes. The formula is ash-free and ISO 22241-compatible, making it safe for all BS-VI SCR systems regardless of manufacturer. It has been used in Euro 6 vehicles globally and is suitable for Indian vehicles from Tata, Mahindra, Ashok Leyland, Force Motors and all other BS-VI OEMs.

Will it help my vehicle pass the PUC emission test?

A clean, fully functioning SCR system reduces NOx emissions as designed, which supports compliance during emission testing. However, if your vehicle is failing PUC due to a faulty sensor or damaged catalyst rather than crystallisation, mechanical repair will be required alongside this treatment.

Is Cash on Delivery available, and how long does delivery take?

Yes — Cash on Delivery is available across India, and delivery is free nationwide. Most orders are delivered within 3–7 business days depending on your location.

Complete Your Kit

Keep your entire BS-VI diesel drivetrain in top condition with these complementary Rislone products.

• Rislone Hy-per Diesel Complete Fuel System Treatment: Cleans fuel injectors, boosts cetane rating of Indian pump diesel, reduces black smoke and helps improve cold starts — the ideal companion for any BS-VI diesel vehicle also running DEF Clean.

Warranty & Support in India

• Warranty: 1-year warranty against manufacturing defects
• Customer Support: Monday–Saturday, 9 AM–6 PM IST. WhatsApp / Phone: +91 93112 11157 · hello@naredi.in
• Returns: 14-day return and exchange policy, COD returns accepted
• Delivery: Free delivery across India, Cash on Delivery available