Rislone Hy-Per Cool 41300

Use When You Notice…

• Temperature gauge creeping toward red in city traffic: Patented wetting agents improve heat transfer during long idle periods common in Indian city driving.
• Radiator repeatedly topped up with hard tap water: Scale-dissolving agents break down calcium deposits that choke radiator channels — a widespread issue across Indian cities.
• Heavy AC use during peak Indian summer heat: Lower coolant surface tension means more efficient heat rejection when ambient temperatures push 42–48°C.
• High-mileage vehicle running warmer than usual: Corrosion inhibitors rejuvenate ageing engines without costly workshop repairs — ideal for 10–15-year-old Indian vehicles.
• Towing, hill driving, or carrying heavy loads: Extra thermal protection when your engine is under sustained stress on ghat roads or loaded highway runs.

Key Benefits

• Temperature Reduction: Drops running temperatures by several degrees Celsius — a measurable improvement when ambient heat crosses 45°C in north and central India.
• Scale Removal: Dissolves and prevents calcium and mineral deposits caused by hard Indian tap water that silently reduce radiator efficiency over time.
• Corrosion Protection: Guards aluminium radiators, copper cores, and plastic components against rust — extending engine life in Indian driving conditions.
• Universal Compatibility: Works with all conventional and long-life coolant formulations without requiring a system flush first.
• Affordable Insurance: One bottle delivers professional-grade cooling protection trusted by Indian mechanics and workshops — without a service centre bill.

The Technology Inside

Rislone Hy-Per Cool 41300 uses patented surfactant wetting agents that reduce coolant surface tension, allowing the liquid to contact hot cylinder-wall metal more efficiently — a process engineers call nucleate boiling suppression. This means heat transfers away from critical engine components faster, reducing hotspots even during prolonged idling. The formula also contains multi-metal corrosion inhibitors specifically effective on the aluminium alloys used in modern BS6 engine blocks and radiators. Scale-dissolving chelating agents attack existing calcium and magnesium deposits without harming rubber hoses or gaskets. The result is a cooling system that performs closer to factory specification, even after years of hard Indian use.

Dosage & Coverage

One 473 ml bottle of Rislone Hy-Per Cool super coolant additive treats a standard passenger car cooling system of approximately 5–10 litres total capacity, which covers most Indian vehicles including Maruti, Hyundai, Tata, and Honda models. Add directly to the coolant reservoir or radiator alongside your existing antifreeze and distilled water mix — no draining required. Repeat every 40,000 km or annually, whichever comes first, for continuous protection.

Compatibility

Safe to use with

• All conventional and long-life coolants — green, pink, blue, orange, and OAT formulations.
• Aluminium, copper, brass, and plastic radiator and heater core materials.
• BS6-compliant petrol and diesel engines, including turbocharged and intercooled variants.
• Suitable for high-mileage Maruti, Hyundai, Tata, Honda, Toyota, and Ford engines.

Not suitable for

• Not a coolant substitute — always use alongside a proper antifreeze and distilled water mix.
• Does not fix overheating caused by a failed thermostat, seized cooling fan, or major head gasket failure — those require mechanical repair.
• Not intended for use in motorcycles with oil-cooled systems unless specified.

Why It Matters in India

Indian summers push ambient temperatures to 45–48°C across north and central India, while stop-go city traffic in Delhi, Mumbai, and Bengaluru forces engines to idle for 20–30 minutes at a time. Hard municipal tap water — routinely used to top up radiators in Tier 2 and Tier 3 cities — leaves calcium scale that reduces heat transfer year after year. With India's huge used-vehicle market, millions of 10–15-year-old Maruti and Hyundai cars are running cooling systems that have never been properly treated. Hy-Per Cool is an affordable, single-bottle solution that addresses all of these uniquely Indian challenges at once.

How To Use

1. Ensure the engine is completely cool before opening the radiator cap or coolant reservoir.
2. Shake the bottle well and pour the recommended quantity directly into the coolant reservoir.
3. Replace the cap securely and start the engine; allow it to reach operating temperature.
4. Check coolant level after the first heat cycle and top up with distilled water if required.

Safety Note: Never open a radiator cap on a hot engine — escaping steam can cause serious burns. Wear gloves and eye protection when handling coolant additives.

Frequently Asked Questions

Can I use Rislone Hy-Per Cool with plain tap water instead of proper coolant?

It significantly improves plain water's heat transfer and corrosion protection, but for Indian conditions a proper coolant and distilled water mix is still recommended for the best year-round protection. Tap water's mineral content will continue to cause scale over time even with the additive present.

Will this fix an overheating problem caused by a faulty thermostat or broken fan?

No — mechanical failures require mechanical repair. Rislone Hy-Per Cool improves heat transfer efficiency in a working cooling system and cannot compensate for a seized fan or stuck thermostat. Get those components inspected first, then add Hy-Per Cool for ongoing protection.

Is it safe for BS6 vehicles with aluminium engine blocks?

Yes — the multi-metal corrosion inhibitors are specifically formulated to protect aluminium alloys used in modern BS6 engines. It will not harm gaskets, seals, or the plastic components common in newer cooling systems.

How often should I use it, and will it affect my PUC or emission test?

Use once every 40,000 km or annually. It contains no substances that affect exhaust emissions, so your PUC certificate will not be impacted in any way.

Is Cash on Delivery available, and how quickly will it arrive?

Yes, COD is available across India on naredi.in, with free delivery to all pin codes. Most orders are delivered within 4–7 business days depending on your location.

Complete Your Kit

For a complete cooling system overhaul, pair Hy-Per Cool with these trusted Rislone products available on naredi.in.

• Rislone Radiator 10 Minute Flush (41211): Use before adding Hy-Per Cool to flush out old scale, rust, and debris — giving the additive a clean system to protect.
• Rislone Liquid Aluminum Stop Leak (41186): Seals minor radiator and heater core leaks common in high-mileage Indian vehicles without needing a workshop visit.
• Rislone Radiator Stop Leak Concentrate (41196): Concentrated formula for stubborn slow leaks — ideal for older Maruti, Tata, and Hyundai cooling systems that have seen years of hard use.

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