---
product_id: 445569408
title: "- Castrol RADICOOL Heavy Duty"
brand: "castrol"
price: "$56"
currency: NZD
in_stock: true
reviews_count: 8
category: "Castrol"
url: https://www.desertcart.nz/products/445569408-castrol-radicool-heavy-duty
store_origin: NZ
region: New Zealand
---

# Max heat transfer efficiency Freezing protection to -37°C Superior corrosion resistance - Castrol RADICOOL Heavy Duty

**Brand:** castrol
**Price:** $56
**Availability:** ✅ In Stock

## Summary

> 🛠️ Keep your engine chill and running thrill – the pro’s choice for heavy-duty cooling!

## Quick Answers

- **What is this?** - Castrol RADICOOL Heavy Duty by castrol
- **How much does it cost?** $56 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/445569408-castrol-radicool-heavy-duty)

## Best For

- castrol enthusiasts

## Why This Product

- Trusted castrol brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Freeze-proof performance:** Reliable protection down to -37°C keeps your engine safe in extreme cold snaps.
- • **Trusted global standards:** Meets JIS K 2234 Class 2, ASTM D3306, and BS 6580:2010 certifications for assured quality.
- • **Eco-conscious formulation:** Environmentally friendly coolant that aligns with your green values.
- • **Corrosion defense for longevity:** Advanced formula guards your engine components against rust and wear.
- • **Engine stays cool under pressure:** Full ethylene glycol base ensures rapid heat dissipation, preventing costly overheating.

## Overview

Castrol RADICOOL Heavy Duty is a premium coolant engineered with a full ethylene glycol base for enhanced heat transfer, corrosion protection, and freeze resistance down to -37°C. Certified to international standards, it safeguards engines against overheating and freezing, ensuring peak performance and durability in demanding conditions.

## Description

Castrol RADICOOL Heavy Duty Coolant provides maximum protection for your engine against overheating, freezing and corrosion under wide operating temperature range, thereby preventing premature engine failure.

Review: Nice - Good product
Review: Best one - Very good product, engine cools better than other brands, ac cooling improved, one bottle is enough.

## Features

- Improved heat transfer ability due to full ethylene glycol base
- Improved hard water stability
- Optimum corrosion protection and freezing protection up to -37 degree celsius
- Environment friendly
- Specification: JIS K 2234 Class 2, ASTM D3306, BS 6580:2010

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09P8JXDGL |
| Assembly Required | No |
| Best Sellers Rank | #2,100 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #19 in Engine Oils for Cars |
| Brand | Castrol |
| Colour | Green |
| Country of Origin | India |
| Customer Reviews | 4.6 4.6 out of 5 stars (301) |
| Date First Available | 27 December 2021 |
| Generic Name | Coolant |
| Importer | Castrol India Limited, Technopolis Knowledge Park, Mahakali Caves Road, Chakala, Andheri East, Mumbai - 400093 |
| Item Dimensions LxWxH | 9.8 x 6.6 x 23.8 Centimeters |
| Item Weight | 65 g |
| Item model number | 3425811 |
| Manufacturer | Castrol India Limited |
| Manufacturer Part Number | 3425811 |
| Model | Castrol RADICOOL Heavy Duty |
| Net Quantity | 1 Pack |
| Packer | As per the first character of batch no. packed by A)B)C) Castrol India Ltd.,Mumbai -93; D) Ishan Resins & Paints Ltd. Gate No. 1, Jalan Industrial Complex, Banjara, Begri, Howrah-711411, West Bengal; E) West Coast Lubricants & Asphalt Pvt. Ltd., 139, J.C.I.E, Kamothe, Panvel - 410209 (MH). Contact: customercare.india@castrol.com; 1800222101 |
| Product Dimensions | 9.8 x 6.6 x 23.8 cm; 65 g |
| Special Features | Improved heat transfer ability due to full ethylene glycol base |

## Images

![- Castrol RADICOOL Heavy Duty - Image 1](https://m.media-amazon.com/images/I/61FRe6O7Z6L.jpg)

## Questions & Answers

**Q: How much distilled water should i add in 1 litre coolant**
A: Usually 1:3 (coolent:distilled water)
Also check manufacturer's recommendation.

**Q: Can this be used in bolero bs6**
A: Yes

**Q: 2 letre coolent mai kitna water mix kare?**
A: 2-3 liters water

**Q: How much maximum distelled water ratio with 1lt ??**
A: Usually 1:3 ratio (coolent: distilled water) Also refer manufacturer recommended.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice
*by V***A on 27 October 2025*

Good product

### ⭐⭐⭐⭐⭐ Best one
*by P***R on 31 August 2025*

Very good product, engine cools better than other brands, ac cooling improved, one bottle is enough.

### ⭐⭐⭐⭐ Genuine product.
*by A***Y on 23 January 2026*

Good

## Frequently Bought Together

- Castrol RADICOOL Heavy Duty
- Castrol MAGNATEC 3416662 Stop-Start 5W-30 Full Synthetic Engine Oil for Petrol, Diesel and CNG Cars (3.5L)
- Castrol Engine Shampoo Pre Oil Change Treatment (Flushing Oil) for Petrol 300 ml, CNG and Diesel Cars (3418104)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-09*