Rislone Hy-Per Cool 41300 – Removes Scale & Reduces Engine Heat

Use When You Notice…

• Temperature gauge climbing toward red in city traffic — stop-start driving in Bengaluru or Delhi reduces coolant flow; Hy-Per Cool improves heat transfer so the system copes better.
• Car runs fine on the highway but overheats in traffic — a sign of reduced cooling efficiency, often from scale build-up that this additive dissolves.
• Radiator topped up with tap water over the years — hard Indian municipal water deposits calcium scale that silently chokes your radiator; this formula clears it.
• You tow a trailer, drive in hilly terrain, or run AC heavily in summer — extra thermal load demands every bit of cooling efficiency your system can offer.
• High-mileage vehicle with a history of running warm — aging Maruti, Hyundai, Tata, or Honda engines benefit from restored cooling system performance without costly overhaul.

Key Benefits

• Up to 8°C Temperature Reduction: Measurably lowers running temperature — critical when ambient air in north and central India hits 42–48°C in May and June.
• Scale Removal & Prevention: Dissolves hard mineral deposits from years of tap-water top-ups, restoring full radiator flow and heat exchange.
• Corrosion Protection: Guards aluminium, copper, and plastic cooling components against rust and electrochemical corrosion common in aging Indian vehicles.
• Universal Coolant Compatibility: Works alongside any coolant type — no drain-and-refill required, no compatibility worries.
• Cost Avoidance: Prevents overheating damage that routinely costs ₹15,000–₹30,000 at Indian workshops, making this one of the highest-value maintenance purchases available.

The Technology Inside

Rislone Hy-Per Cool uses patented surfactant-based wetting agents that reduce the surface tension of your coolant, allowing it to make fuller, faster contact with hot cylinder-wall metal — this is the mechanism behind improved heat transfer efficiency. The formula also contains organic acid technology (OAT-compatible) corrosion inhibitors that create a protective molecular film on aluminium, copper, and solder surfaces. Scale-dissolving chelating agents break down calcium carbonate and magnesium deposits — the exact minerals found in high-TDS Indian municipal water — without damaging hoses or seals. Trusted by Indian mechanics and workshops as a reliable thermal management aid, it works within a few heat cycles to restore cooling efficiency you can feel on the temperature gauge.

Dosage & Coverage

One 473 ml bottle of this super coolant additive treats a standard passenger car cooling system of 4–8 litres capacity — typically representing 5–10% of total system volume. Pour the full bottle into the coolant reservoir or radiator; it works alongside your existing antifreeze and water mix and does not replace it. For best results, use at every coolant service interval or whenever scale build-up is suspected.

Compatibility

Safe to use with

• All conventional and long-life coolants — green, blue, pink, orange, and OAT formulations
• Aluminium, copper, brass, and plastic radiators and heater cores
• Petrol, diesel, and hybrid engines including BS6-compliant vehicles
• Turbocharged engines and intercooled systems
• High-mileage Maruti Suzuki, Hyundai, Tata, Honda, and Toyota engines

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 blown head gasket
• Does not replace a full radiator flush when coolant is severely contaminated

Why It Matters in India

Indian summers push ambient temperatures to 45–48°C across north and central India, while city traffic forces engines to idle for 20–30 minutes at a stretch — a combination that stresses even well-maintained cooling systems. Hard tap water used to top up radiators across Tier 2 and Tier 3 cities leaves calcium scale year after year, quietly reducing heat transfer. Hy-Per Cool addresses both problems simultaneously, making it ideal insurance against overheating — the single most common cause of engine failure during Indian summer months. BS6-compliant vehicles with aluminium-intensive engine designs are especially sensitive to corrosion, making the inhibitor package in this formula particularly relevant.

How To Use

1. Ensure the engine is completely cool before opening the radiator cap or coolant reservoir.
2. Shake the bottle well, then pour the entire 473 ml into the reservoir or radiator opening.
3. Replace the cap securely, start the engine, and allow it to reach operating temperature.
4. Drive normally — full benefits appear after two to three heat cycles as the additive circulates.

Safety Note: Never open a hot radiator cap — escaping steam causes serious burns. Always work on a cool engine.

Frequently Asked Questions

Can I use Hy-Per Cool if I've been topping up with plain tap water instead of coolant?

Yes — it significantly improves plain water's heat transfer and corrosion protection, and will begin dissolving existing scale immediately. However, for year-round protection in Indian conditions, we recommend switching to a proper antifreeze and distilled water mix alongside the additive.

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

No — mechanical failures require mechanical repair first. Hy-Per Cool optimises heat transfer efficiency in a functioning cooling system; it cannot compensate for a seized fan or stuck thermostat. Get mechanical faults fixed before adding any coolant additive.

Is it safe for my BS6 Maruti Swift, Hyundai i20, or Tata Nexon?

Yes — Hy-Per Cool is compatible with all modern BS6 petrol and diesel engines, including those in popular Indian models. It is safe for aluminium engine blocks and plastic reservoir tanks standard in current-generation vehicles.

How often should I use it?

Add one bottle at every coolant service interval — typically every 1–2 years — or any time you suspect scale build-up from hard water top-ups. For heavily used or high-mileage vehicles, annual treatment is ideal.

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

Yes — COD is available across India through naredi.in, with free delivery nationwide. Most metro orders are delivered within 3–5 business days; Tier 2 and Tier 3 cities typically receive orders within 5–7 business days.

Complete Your Kit

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

• Rislone Radiator 10 Minute Flush (41211) — flush out old scale, rust, and contaminated coolant before adding Hy-Per Cool for maximum effectiveness.
• Rislone Liquid Aluminum Stop Leak (41186) — seals minor radiator and heater core leaks common in high-mileage Indian vehicles, complementing Hy-Per Cool's corrosion protection.
• Rislone Radiator Stop Leak Concentrate (41196) — a targeted sealing solution for slow coolant loss, ideal for aging engines being rejuvenated 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