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, keeping temps stable when airflow drops to zero.
• Radiator repeatedly topped up with hard tap water: Scale-dissolving agents break down calcium deposits that choke radiator channels — a widespread problem where tap water TDS regularly exceeds 500 ppm.
• Heavy AC use during peak Indian summer: Lower coolant surface tension means more efficient heat rejection when ambient temperatures push 42–48°C and your condenser is already working overtime.
• High-mileage vehicle running warmer than usual: Corrosion inhibitors rejuvenate ageing cooling systems common in 10–15-year-old Maruti, Hyundai, Tata, and Honda engines without costly workshop repairs.
• Driving in hilly terrain or towing a trailer: Extended climbs at low speed generate sustained heat spikes; Hy-Per Cool provides the extra thermal headroom your cooling system needs.

Key Benefits

• Temperature Reduction: Drops engine running temperatures by several degrees Celsius — a measurable improvement that protects your engine in Indian summer heat reaching 42–48°C ambient.
• Scale Removal: Dissolves and prevents hard-water mineral deposits that silently choke radiator channels in cities where tap water quality is poor.
• Corrosion Protection: Guards aluminium radiators, copper cores, and rubber hoses against electrochemical corrosion — extending engine life in Indian driving conditions.
• Universal Compatibility: Works with all conventional and OAT long-life coolants; no draining, no flushing, and no special tools required.
• Cost-Effective Insurance: One affordable bottle delivers workshop-grade cooling system protection — trusted by Indian mechanics and workshops across the country.

The Technology Inside

Rislone Hy-Per Cool 41300 uses patented wetting agents that reduce coolant surface tension, allowing the fluid to contact hot cylinder-wall metal more efficiently and transfer heat away faster — a process engineers call nucleate boiling suppression. Chelating scale inhibitors target calcium and magnesium ions left behind by hard tap water, preventing the mineralisation that reduces radiator thermal conductivity over time. Organic corrosion inhibitors form a protective boundary layer on aluminium, copper, and ferrous metal surfaces, guarding against galvanic and oxidative attack that accelerates in high-temperature environments. Together, these mechanisms deliver measurable thermal performance gains without altering the pH or additive balance of your existing coolant formulation.

Dosage & Coverage

One 473 ml bottle of Rislone Hy-Per Cool 41300 is sufficient to treat a complete passenger car or light commercial vehicle cooling system — typically representing 5–10% of total system capacity. Simply add the contents directly to the coolant reservoir or radiator alongside your existing antifreeze/water mix; no draining required. For best results, use every 12 months or at every major service interval to maintain scale inhibition and corrosion protection throughout the Indian summer season.

Compatibility

Safe to use with

• All conventional and long-life OAT/HOAT coolants — green, pink, blue, and orange formulations
• Aluminium, copper-brass, and plastic radiator constructions
• BS6-compliant petrol and diesel engines, including turbocharged and intercooled variants
• Suitable for high-mileage Maruti, Hyundai, Tata, Honda, Toyota, and Mahindra vehicles

Not suitable for

• Not a coolant substitute — always use alongside a proper antifreeze/distilled water mix
• Does not fix overheating caused by a failed thermostat, seized cooling fan, or major head gasket failure — these require mechanical repair
• Not recommended as a standalone treatment in systems with severe coolant leaks

Why It Matters in India

Indian summers push ambient temperatures to 45–48°C across north and central India, while stop-go city traffic forces engines to idle for 20–30 minutes at a stretch with zero airflow across the radiator. Hard municipal tap water — routinely used to top up radiators in Tier 2 and Tier 3 cities — leaves calcium scale that quietly reduces heat transfer year after year. Hy-Per Cool addresses both issues simultaneously, making it one of the most practical engine coolant additives available for Indian cars across every climate zone and road condition.

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 full 473 ml into the coolant reservoir or radiator filler neck.
3. Replace the cap securely, start the engine, and allow it to reach normal operating temperature.
4. Bleed any trapped air following your vehicle's procedure; benefits become apparent after 2–3 heat cycles.

Safety Note: Never open a radiator cap on a hot engine — pressurised coolant can cause serious burns. Allow the engine to cool fully before servicing the cooling system.

Frequently Asked Questions

Can I use Rislone Hy-Per Cool 41300 with plain tap water instead of coolant?

It significantly improves plain water's heat transfer efficiency and adds corrosion protection, which is better than nothing. However, for Indian conditions — especially summer heat and hard water — a proper coolant/distilled water mix is still recommended for the best year-round protection and to prevent further scale build-up.

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

No — mechanical failures require mechanical repair, and no additive can compensate for a failed thermostat or a seized radiator fan. Hy-Per Cool optimises heat transfer efficiency in a working cooling system; if your temperature gauge is in the red, have a mechanic inspect the system first.

Is it safe for BS6 engines in newer Maruti, Hyundai, and Tata vehicles?

Yes, Rislone Hy-Per Cool 41300 is fully compatible with BS6 petrol and diesel engines, including those with turbochargers, intercoolers, and EGR systems. It does not affect emission control components or alter exhaust gas composition in any way.

How often should I use this product?

One application lasts approximately 12 months or one full service interval. Given the intensity of Indian summer driving, we recommend re-applying at every annual service to maintain continuous scale inhibition and corrosion protection through peak heat months.

Is Cash on Delivery available, and how long does delivery take?

Yes — naredi.in offers Cash on Delivery across India with free shipping on all orders. Most metro areas receive orders within 2–4 business days; Tier 2 and Tier 3 cities typically within 4–6 business days.

Complete Your Kit

For total cooling system health, pair Rislone Hy-Per Cool 41300 with these complementary Rislone products available at naredi.in:

• Rislone Radiator 10 Minute Flush (41211): Clears sludge, rust, and old coolant residue before adding Hy-Per Cool, ensuring the additive works in a clean system for maximum effectiveness.
• Rislone Liquid Aluminum Stop Leak (41186): Seals minor radiator and heater core leaks common in high-mileage Indian vehicles — use it alongside Hy-Per Cool to address both leaks and thermal inefficiency in one service.
• Rislone Radiator Stop Leak Concentrate (41196): A concentrated formula that permanently seals small cracks and pinhole leaks, ideal for ageing cooling systems that need rejuvenation without a full workshop overhaul.

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