Rislone 41111

Use When You Notice…

• White exhaust smoke that won't clear: Coolant burning in the combustion chamber signals a head gasket breach — this block sealant targets exactly that leak path.
• Milky or frothy oil on the dipstick: Coolant mixing with engine oil confirms internal leakage; sealing the source early prevents costly bearing damage.
• Unexplained coolant loss with no external leak: When the reservoir keeps dropping but there's no puddle under the car, combustion-side ingestion is the likely cause.
• Combustion gases in the coolant: A bubble test or colour-change strip confirming exhaust gases in coolant is the clearest sign this product is needed.
• Mechanic-identified small coolant passage crack: For minor structural cracks or porosity, this cracked engine block sealant provides a practical repair path without teardown.

Key Benefits

• Stops Coolant-Side Leaks: Seals combustion-to-coolant breaches that cause white smoke and coolant loss in high-mileage Indian engines.
• Repairs Minor Cracks Internally: Fixes small cracks and porosity in cylinder heads and engine blocks without any disassembly.
• Durable, Permanent-Type Seal: The heat-activated formula bonds durably at the leak point — engineered to last, not to merely postpone the problem.
• Major Cost Saving: Helps you avoid an immediate engine overhaul that can cost ₹25,000–₹80,000 at an Indian workshop.
• Works in Indian Summer Heat: Formula performs reliably in engines stressed by 42–48°C ambient temperatures and brutal stop-go city traffic in Delhi, Mumbai, and Bengaluru.

The Technology Inside

Rislone 41111 is based on a sodium silicate chemistry combined with fibrous sealing particles that circulate freely with engine coolant. When the mixture reaches a combustion-side leak point, the extreme heat triggers a chemical reaction that hardens the silicate into a dense, heat-resistant plug — filling the gap from within. Unlike older stop-leak products that use particulate blocking, the reactive silicate matrix bonds to the metal surface for a more durable result. This mechanism makes it particularly effective on the porosity leaks and hairline head gasket failures common in ageing petrol and diesel engines running in India's harsh thermal cycle of cold morning starts followed by peak-summer heat soak.

Dosage & Coverage

One bottle of Rislone 41111 is designed for a standard passenger-car cooling system. Add it following the exact procedure on the bottle — cooling system preparation, correct product addition, and a controlled idle/drive heat cycle are all required for the sealing reaction to work properly. Do not exceed the recommended dose; more product does not produce a better seal and may restrict coolant flow.

Compatibility

Safe to use with

• Water-cooled petrol and diesel engines where coolant circulates freely throughout the system.
• Compatible with most OEM coolant types used in Maruti Suzuki, Hyundai, Tata, Honda, Kia Seltos, Tata Punch, Tata Nexon, and similar vehicles.
• Suitable for high-mileage engines in second-hand and long-running vehicles.

Not suitable for

• Not a fix for severe mechanical damage — broken connecting rods, large structural cracks, or badly warped cylinder heads require machining or replacement.
• Will not seal leaks effectively if coolant passages are blocked with scale, rust, or old stop-leak debris.
• Not intended as a preventive maintenance additive — use only for confirmed leaks.
• Not suitable for BMW M5 or other high-performance vehicles with aluminium-intensive cooling systems without first consulting a specialist.

Why It Matters in India

In India, a head gasket replacement can cost ₹25,000–₹80,000 — often more than the market value of an older car. For taxis, autorickshaws, and vehicles in Tier 2 and Tier 3 cities far from machine shops, Rislone 41111 offers a viable repair path when immediate teardown is not practical. Indian roads, with potholes and speed breakers every 500 metres and stop-go city traffic, accelerate engine thermal stress — making coolant-side leaks more common in high-mileage Indian vehicles. This cracked engine block sealer helps rejuvenate ageing engines without costly workshop repairs, extending vehicle life in Indian driving conditions.

How To Use

1. Flush the cooling system thoroughly and drain old coolant before adding any product.
2. Add Rislone 41111 to the radiator or coolant reservoir exactly as directed on the bottle label.
3. Run the engine through the specified idle and drive heat cycle to activate the sealing reaction.
4. Allow the system to cool, confirm the seal, then replace with fresh coolant as recommended.

Safety Note: Never open a hot radiator cap. Allow the engine to cool completely before inspecting coolant levels. Dispose of old coolant responsibly — do not pour it into drains.

Frequently Asked Questions

Is this a temporary or permanent repair?

When applied correctly to a surface that is not mechanically damaged, the sodium silicate reaction produces a durable, long-lasting seal — not a short-term fix. Many vehicles treated correctly continue operating normally for years without recurrence of the original leak.

Will it work on my Kia Seltos, Tata Punch, or Tata Nexon?

Rislone 41111 is compatible with the water-cooled petrol and diesel engines used in popular Indian vehicles including the Kia Seltos, Tata Punch, and Tata Nexon, provided the leak is a minor head gasket or block porosity issue. Always confirm the nature of the leak with your mechanic before use — severe mechanical damage needs workshop attention.

Is it safe for BS6-compliant engines?

The product is designed for water-cooled engines and does not interact with the fuel system, DPF, SCR, or other BS6 emission components. However, any unresolved coolant leak in a BS6 engine can affect PUC test results — sealing the source is the right approach to restoring normal emissions performance.

Can I use this as preventive maintenance?

No — Rislone 41111 is a targeted repair product for confirmed coolant-side leaks, not a preventive additive. Using it in a healthy cooling system without a confirmed leak is unnecessary and not recommended by the manufacturer.

Is Cash on Delivery available and how fast will it arrive?

Yes, Cash on Delivery is available across India through naredi.in, with free delivery on all orders. Most metro areas receive orders within 2–4 business days; Tier 2 and Tier 3 cities typically within 4–7 business days.

Complete Your Kit

For the best result, pair Rislone 41111 with these complementary products:

• Rislone Radiator 10 Minute Flush (41211): Clear scale, rust, and old stop-leak debris from the cooling system before applying Block Seal — a clean system is essential for the sealing reaction to work correctly.

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

The estimated lead time is 2 -3 days, but naredi.in or its affiliates are not responsible for delays or damages by courier. Any damages during transit need to be reported within 24 hours of receiving the shipment. We will try our best to help you resolve the issue.
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We have a 14-day return policy, which means you have 14 days after receiving your item to request a return. 
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