Rislone DEF Clean

Use When You Notice…

• SCR or DEF warning light on the dashboard: Crystallisation blocks DEF flow and triggers fault codes — this def cleaner dissolves the blockage before it escalates to 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 the lines and 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 wasted fluid.
• Long highway runs in peak Indian summer heat: High ambient temperatures accelerate urea crystal formation in exposed DEF lines — preventive dosing keeps flow consistent.

Key Benefits

• Dissolves existing crystals: Breaks up biuret and cyanuric acid deposits inside AdBlue tanks, pumps and dosing injectors — restoring normal DEF flow quickly.
• Prevents limp mode and fault codes: Clean DEF lines mean the ECU reads correct concentration, avoiding the SCR fault codes that trigger limp mode on BS-VI vehicles.
• All-season performance: Conditions your DEF fluid for reliable atomisation whether you're running through 45°C Rajasthan highways or 2°C Delhi winter mornings.
• Ash-free formula: Contains zero ash-forming compounds — safe for SCR catalysts and fully compatible with ISO 22241 AdBlue specifications.
• Outstanding cost value: One bottle treats up to 150 litres of DEF, making it a fraction of the cost of even a basic SCR pump replacement.

The Technology Inside

Rislone DEF Clean contains specialised ash-free urea-compatible surfactants that penetrate and break apart the crystalline lattice structure of biuret and cyanuric acid — the two primary degradation products of urea that solidify inside DEF tanks, supply lines and dosing injectors. Unlike generic def cleaner fluid products, this formulation also conditions the AdBlue solution itself, restoring correct urea concentration so the NOx sensor and SCR catalyst receive the right dosing ratio. The result is restored exhaust after-treatment efficiency without introducing sulphates, phosphates or metallic compounds that could poison the SCR catalyst. Indian mechanics familiar with SCR dosing module failures will recognise that many apparent "pump failures" are actually crystallisation blockages — and this is precisely the condition this additive is engineered to reverse.

Dosage & Coverage

Add approximately 30 ml (1 oz) per 38 litres (10 gallons) of DEF directly into the blue-capped AdBlue filler — never into the diesel fuel tank or engine oil. For vehicles showing active symptoms or heavy visible crystallisation, use a double dose at first treatment. One 500 ml bottle provides preventive treatment for a standard commercial vehicle DEF tank many times over, making regular def cleaning extremely cost-effective.

Compatibility

Safe to use with

• All BS-VI (Euro 6) diesel vehicles fitted with SCR after-treatment systems.
• Commercial vehicles: Tata Prima, Ashok Leyland heavy trucks, Mahindra TUV300+ and Force Motors diesel vehicles.
• Passenger SUVs and MUVs with factory AdBlue/DEF systems.
• All ISO 22241-compliant AdBlue and DEF fluids.
• Buses, school vans and fleet diesel vehicles on BS-VI norms.

Not suitable for

• Do not add to the diesel fuel tank or engine oil — DEF/AdBlue tank only.
• Cannot repair physical damage to SCR catalyst substrate or failed NOx sensors.
• Not a substitute for replacing genuinely failed DEF pumps or injectors.

Why It Matters in India

Indian BS-VI commercial vehicles face uniquely harsh SCR conditions: DEF tanks bake in 45°C+ summer heat on long NH runs, then face near-freezing cold starts in Delhi, Chandigarh and Amritsar during December and January. This thermal cycling accelerates urea crystal formation far faster than European conditions the system was originally engineered for. SCR component replacement — pump, injector or catalyst — can cost ₹25,000 to ₹1,50,000 at authorised service centres, making preventive def cleaning essential for fleet operators and private owners alike.

How To Use

1. Check your DEF tank capacity using the dosage chart on the bottle label.
2. Pour the measured amount directly into the blue-capped AdBlue filler only.
3. Use a double dose if heavy white crystallisation is already visible or fault codes are active.
4. Top up your DEF fluid as normal and drive — the additive works through normal SCR operation.

Safety note: AdBlue and this additive are corrosive to painted surfaces and metals — wipe any spills immediately with water. Keep away from children.

Frequently Asked Questions

Can Rislone DEF Clean clear existing SCR fault codes?

If the fault code is caused by DEF crystallisation blocking flow or distorting concentration readings, dissolving the crystals can allow the code to clear after a drive cycle. Fault codes originating from physical catalyst damage, a failed NOx sensor or a burnt-out pump motor will require mechanical repair at a service centre.

How often should I use this def cleaner additive?

As a preventive measure, dose with every second or third AdBlue top-up under normal conditions. If your vehicle operates in extreme heat (Rajasthan, Gujarat summers) or sub-5°C North India winters, dose with every fill for maximum protection.

Is it safe for my Tata or Ashok Leyland BS-VI truck?

Yes — the ash-free, ISO 22241-compatible formula is safe for all BS-VI SCR systems including those fitted to Tata Prima, Ashok Leyland, Mahindra and Force Motors commercial vehicles. It introduces no compounds harmful to the SCR catalyst or DEF pump seals.

Will this help my vehicle pass a PUC emission test?

A clean, correctly functioning SCR system reduces NOx emissions as designed, which supports cleaner exhaust output. While this product targets DEF system health rather than directly reducing visible black smoke, a fully operational SCR system is essential for BS-VI emission compliance and PUC certification.

Is Cash on Delivery available and how fast is delivery?

Yes — Cash on Delivery is available across India through naredi.in. Delivery is free nationwide, and orders typically reach most metros within 3–5 business days.

Complete Your Kit

Keep your entire BS-VI diesel drivetrain clean and protected with these companion Rislone treatments:

• Rislone Hy-per Diesel Complete Fuel System Treatment — cleans injectors, boosts cetane rating of Indian pump diesel, reduces black smoke and supports easier cold starts in North India winters; pairs perfectly with DEF Clean for total diesel system care.

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