Rislone Hy-Per Cool 41300

Use When You Notice…

• Temperature gauge creeping toward red in city traffic — stop-start driving reduces airflow; Hy-Per Cool improves heat transfer so your engine stays cooler at idle.
• Coolant topped up repeatedly with tap water — hard municipal water leaves scale that insulates radiator walls; this super coolant additive dissolves those deposits.
• Engine runs fine on highways but overheats in traffic — a scaled cooling system cannot cope with sustained low-speed load; this restores efficiency.
• Running AC heavily in summer or towing a load — extra thermal stress demands better heat transfer, exactly what patented wetting agents deliver.
• Driving a high-mileage Maruti, Hyundai, Tata, or Honda — older cooling systems accumulate years of scale; rejuvenate without a costly flush or overhaul.

Key Benefits

• Up to 8°C Temperature Drop: Delivers a measurable, instrument-verified reduction in coolant temperature — critical when ambient air is already 42–48°C.
• Scale Removal & Prevention: Dissolves existing mineral deposits and prevents new ones, restoring radiator efficiency in vehicles topped up with hard Indian tap water.
• Corrosion Protection: Guards aluminium engine blocks, copper radiators, and plastic tanks against electrochemical corrosion common in aging Indian vehicles.
• Universal Coolant Compatibility: Works safely alongside any factory-fill or aftermarket coolant — no draining required before adding.
• Cost Avoidance: Prevents overheating repairs that typically cost ₹15,000–₹30,000 at Indian workshops — affordable insurance for every season.

The Technology Inside

Rislone Hy-Per Cool uses patented surfactant wetting agents that reduce coolant surface tension, allowing the liquid to contact hot cylinder-wall metal more intimately for superior convective heat transfer. This process — sometimes called nucleate boiling suppression — means heat moves from metal to coolant faster, keeping peak temperatures lower without any hardware change. Scale-dissolving chelating agents break down calcium carbonate and magnesium deposits that accumulate from years of hard-water top-ups, restoring original radiator flow rates. Organic corrosion inhibitors then form a protective film on aluminium, copper, and cast-iron surfaces, extending component life in India's high-humidity and high-temperature environment. The result is a cooler, cleaner, and better-protected cooling system — trusted by Indian mechanics and workshops for high-mileage engine care.

Dosage & Coverage

One 473 ml bottle treats a complete passenger-car cooling system, typically representing 5–10% of total system capacity. Pour the entire bottle into the coolant reservoir or radiator opening — no draining, no measuring, no tools required. For best results, use every 1–2 years or whenever coolant is changed, especially before the Indian summer months of April–June.

Compatibility

Safe to use with

• All conventional and long-life coolants — green, pink, blue, orange, and OAT formulations
• Aluminium, copper, brass, and plastic radiators and overflow tanks
• Petrol, diesel, and hybrid engines including BS6-compliant vehicles
• Turbocharged and intercooled engines common in modern Indian cars and SUVs

Not suitable for

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

Why It Matters in India

Indian summers push ambient temperatures to 45–48°C across north and central India, while urban traffic in Delhi, Mumbai, and Bengaluru forces engines to idle for 20–30 minutes at a stretch. Hard municipal tap water — routinely used to top up radiators — deposits calcium scale that silently reduces heat transfer year after year. Hy-Per Cool addresses both issues in a single dose, making it an ideal super coolant additive for high-mileage Maruti, Hyundai, Tata, and Honda engines that have spent years in these punishing conditions. It is fully compatible with BS6 emission norms and will not affect your PUC certificate.

How To Use

1. Ensure the engine is completely cool before opening the radiator cap or reservoir.
2. Shake the bottle well, then pour the entire 473 ml into the coolant reservoir or radiator.
3. Replace the cap securely and start the engine; run until it reaches operating temperature.
4. Bleed any trapped air per your vehicle's procedure; benefits appear within a few heat cycles.

Safety Note: Never open a hot radiator cap — escaping steam can cause serious burns. Always allow the engine to cool fully before servicing the cooling system.

Frequently Asked Questions

Can I use Hy-Per Cool with plain tap water instead of 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. Tap water alone — even treated — lacks the boiling-point elevation and freeze protection that a quality antifreeze provides.

Will this fix my overheating problem if my thermostat or fan is faulty?

No — mechanical failures require mechanical repair first. Hy-Per Cool optimises heat transfer in a functioning cooling system; it cannot compensate for a broken thermostat, seized fan, or blocked radiator core.

Is it safe for BS6 vehicles and will it affect my PUC test?

Yes, it is fully compatible with BS6 petrol and diesel vehicles. It works within the cooling circuit only and has no effect on combustion or exhaust emissions, so your PUC certificate is unaffected.

How often should I use it, and is it available on COD?

Use once a year or with every coolant change — ideally before Indian summer. Yes, Cash on Delivery is available across India through naredi.in, with free delivery to all pin codes.

Is this the same as coolant tablets or def in diesel treatments?

No — Hy-Per Cool is a liquid super coolant additive, not a tablet or a DEF (Diesel Exhaust Fluid) product. It works inside the engine's water-cooling circuit to reduce heat and remove scale, a completely separate function from diesel exhaust aftertreatment.

Complete Your Kit

For a full cooling-system service, pair Hy-Per Cool with these trusted Rislone products available at naredi.in.

• Rislone Radiator 10 Minute Flush (41211): Flush out old scale, rust, and contaminated coolant before adding Hy-Per Cool for maximum performance from day one.
• Rislone Liquid Aluminum Stop Leak (41186): Seal pinhole leaks and weeping joints in aluminium radiators — a common issue in high-mileage Indian vehicles — without workshop visits.
• Rislone Radiator Stop Leak Concentrate (41196): Concentrated formula that tackles slow coolant loss from radiator seams, hose connections, and gaskets, protecting your cooler coolant investment.

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