Rislone Hyper Cool Super Coolant - 473 ML

Use When You Notice…

• Temperature gauge creeping toward red in city traffic: Stop-start driving in Delhi, Mumbai, or Bengaluru generates sustained heat; Hy-Per Cool improves how efficiently coolant pulls heat away from cylinder walls.
• Gauge climbs in jams but settles on the highway: A classic sign of scale build-up reducing heat transfer — the scale-dissolving agents clean deposits progressively over a few heat cycles.
• Radiator topped up repeatedly with tap water: Hard Indian tap water leaves mineral deposits that silently choke heat transfer year after year — this product addresses that directly.
• Running AC heavily in summer or towing a load: Extra thermal load on an already stressed cooling system benefits immediately from improved coolant wetting efficiency.
• Driving in hilly terrain like Shimla, Ooty, or Lonavala: Prolonged low-gear climbing generates intense heat; better heat transfer keeps temperatures in the safe zone.

Key Benefits

• Measurable Temperature Drop: Reduces engine running temperatures by several degrees Celsius — a real difference when ambient temperatures exceed 45°C.
• Scale Removal: Dissolves and prevents calcium and mineral scale deposits caused by hard Indian tap water, restoring lost cooling efficiency without a full flush.
• Corrosion Protection: Built-in inhibitors protect aluminium radiators, copper cores, and engine blocks — extending engine life in Indian driving conditions.
• Universal Compatibility: Works with all coolant colours and formulations; no draining or system prep required before adding.
• Affordable Engine Insurance: Rejuvenates aging engines without costly workshop repairs — trusted by Indian mechanics across Tier 1, 2, and 3 cities.

The Technology Inside

Rislone Hy-Per Cool 41300 uses patented surfactant wetting agents that reduce the surface tension of your coolant, allowing it to make closer, more consistent contact with hot cylinder-wall metal — a process engineers call nucleate boiling suppression. The result is faster, more efficient heat transfer from the engine block to the radiator. Proprietary scale-dissolving chemistry targets calcium carbonate and magnesium deposits — the specific minerals found in hard Indian municipal water — breaking them down gradually without damaging seals or gaskets. Corrosion inhibitors formulated for both aluminium and copper metallurgy provide continuous electrochemical protection, particularly important for BS6-era engines that combine aluminium blocks with mixed-metal cooling circuits.

Dosage & Coverage

One 473 ml bottle of Rislone Hy-Per Cool treats a full passenger-vehicle cooling system and is added directly to the coolant reservoir alongside your existing antifreeze and water mix — typically representing 5–10% of total system capacity. It does not replace coolant; always use it alongside a proper antifreeze and distilled-water mixture as per your vehicle manufacturer's recommendation. For most Indian passenger cars — Maruti Swift, Hyundai i20, Tata Nexon, Honda City — one bottle per cooling system service interval is sufficient.

Compatibility

Safe to use with

• All conventional and long-life coolants — green, blue, pink, and orange formulations.
• Aluminium, copper, brass, and plastic radiator cores and tanks.
• BS6-compliant petrol and diesel engines, including turbocharged and intercooled variants.
• Cars, SUVs, vans, and light commercial vehicles.

Not suitable for

• Not a coolant substitute — always use alongside proper antifreeze and distilled water.
• Cannot fix overheating caused by a failed thermostat, seized cooling fan, or major head gasket failure — mechanical faults need mechanical repair.
• Not intended for motorcycles or two-wheelers with open cooling systems.

Why It Matters in India

Indian summers push ambient temperatures to 45–48°C in north and central India, while city traffic forces engines to idle for 20–30 minutes continuously. Hard municipal tap water — used routinely to top up radiators across India — leaves calcium scale that reduces heat transfer year after year in high-mileage vehicles. Overheating is the single biggest cause of engine failure during Indian summer months, and Hy-Per Cool provides affordable, no-drain protection that suits the Indian habit of maintaining vehicles for 10–15 years without full overhauls.

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 into the coolant reservoir.
3. Replace the reservoir cap securely and start the engine to circulate the additive.
4. Drive normally — full scale-dissolving and temperature benefits appear after two to three heat cycles.

Safety Note: Never open a radiator cap on a hot engine — pressurised coolant can cause serious burns. Allow at least 30 minutes of cooling time after switching off.

Frequently Asked Questions

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

It significantly improves plain water's heat-transfer performance and corrosion protection, but for Indian conditions a proper antifreeze and distilled-water mix is still recommended for the best year-round protection. Tap water alone — even with this additive — still carries dissolved minerals that deposit over time.

Is this safe for BS6 vehicles like the Tata Nexon, Hyundai Creta, or Maruti Brezza?

Yes — Rislone Hy-Per Cool 41300 is compatible with BS6-era aluminium and mixed-metal cooling systems. Its corrosion inhibitors are specifically formulated to protect modern aluminium engine blocks and radiators common in BS6 vehicles.

Will it fix my overheating problem caused by a bad thermostat or broken fan?

No — mechanical failures require mechanical repair and this product cannot compensate for a seized fan or stuck thermostat. Hy-Per Cool improves heat-transfer efficiency within a working cooling system; have mechanical faults inspected at your nearest workshop first.

How often should I use this product?

One bottle per cooling system service interval is typical — most Indian mechanics recommend reapplying when you flush and refill your coolant, usually every 30,000–40,000 km. If you top up frequently with tap water, an annual dose is good practice.

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

Yes, COD is available on orders across India from naredi.in. Delivery typically reaches metro cities within 2–4 days and Tier 2 and 3 cities within 4–7 business days.

Complete Your Kit

For full cooling-system health, 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 on a heavily scaled or neglected system — clears loose deposits and old coolant in a single 10-minute flush cycle.
• Rislone Liquid Aluminum Stop Leak (41186): Seals minor radiator and cooling-system leaks common in high-mileage Indian vehicles without draining the system.
• Rislone Radiator Stop Leak Concentrate (41196): A concentrated formula for persistent slow leaks from radiator seams, hose connections, and cooling-system gaskets.

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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