---
product_id: 350599391
title: "Castrol Radi Cool Premix Summer Coolant and Antifreeze (4L)"
brand: "castrol"
price: "R821"
currency: ZAR
in_stock: true
reviews_count: 1
category: "Castrol"
url: https://www.desertcart.co.za/products/350599391-castrol-radi-cool-premix-summer-coolant-and-antifreeze-4l
store_origin: ZA
region: South Africa
---

# Compatible with aluminum & cast-iron engines Freeze protection down to -36°C Optimal corrosion resistance Castrol Radi Cool Premix Summer Coolant and Antifreeze (4L)

**Brand:** castrol
**Price:** R821
**Availability:** ✅ In Stock

## Summary

> ❄️ Keep your engine cool, protected, and ahead of the pack!

## Quick Answers

- **What is this?** Castrol Radi Cool Premix Summer Coolant and Antifreeze (4L) by castrol
- **How much does it cost?** R821 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/350599391-castrol-radi-cool-premix-summer-coolant-and-antifreeze-4l)

## 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

- • **No-Nasties Formula:** Free from nitrites, amines, and phosphates to prevent deposits
- • **Year-Round Engine Shield:** Provides frost and corrosion protection for all seasons
- • **Trusted Quality by Castrol:** Backed by ASTM and JIS certifications for reliable engine care
- • **Advanced Aluminum Compatibility:** Formulated for both petrol and diesel engines with modern alloys
- • **Efficient Cooling & Lubrication:** Prevents boiling and lubricates water pumps for peak performance

## Overview

Castrol Radi Cool Premix Summer Coolant and Antifreeze (4L) is a premium, concentrated coolant designed for petrol and diesel engines with aluminum or cast-iron components. It offers freeze protection down to -36°C at 50% dilution, superior corrosion resistance, and compatibility with modern engine materials. Free from harmful additives, it ensures efficient cooling and water pump lubrication, making it a trusted choice for year-round engine maintenance.

## Description

Castrol Radicool Summer coolant and antifreeze. Castrol Radicool is a concentrated engine coolant for use in both petrol and diesel engines with aluminum or cast-iron engines. This coolant can be mixed using 33% concentration with purified water to give frost protection to -18 deg C, however it is recommended to use a 50% dilution to provide optimum corrosion protection and freeze protection down to -36 deg C. At these concentrations this coolant will provides year-round protection. To maintain optimum performance this product should be replaced after 1 year. ApplicationCastrol Radicool is a mixture of monoethylene glycol and selected chemical agents. It contains no nitrites, amines or phosphates. Because it contains no phosphate, the problems of deposits in some modern performance engines are reduced. Castrol Radicool provides: protection against hard water effective engine cooling without boiling; protection against corrosion of the alloys used in the cooling system of modern vehicles; compatibility with conventional seal and hose materials used in engine cooling systems; protection against cavitation corrosion; efficient lubrication of water pumps contains bittering agentIn most cases, coolants are not compatible and should not be mixed with other coolants unless directed by the equipment manufacturer. If using Castrol Radicool for the first time, ensure that the cooling system has been adequately flushed with clean water before use. Product Performance ClaimsASTM D3306BS 6580: 2010JIS K2234.

Review: Great Quality Coolant. - Very good quality coolant. Using it in my car for a year now and temps have been more stable. Definitely recommend it.

## Features

- Brand: Castrol
- Quantity: 4L
- Premium Quality
- Premix Summer Coolant and Antifreeze

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09C4NDPNR |
| Best Sellers Rank | #109,903 in Automotive ( See Top 100 in Automotive ) #165 in Antifreezes & Coolants |
| Brand | Castrol |
| Customer Reviews | 5.0 5.0 out of 5 stars (1) |
| Date First Available | 8 August 2021 |
| Manufacturer | Castrol |
| Manufacturer Part Number | 22-728044-IFG |
| Manufacturer reference | 22-728044-IFG |

## Images

![Castrol Radi Cool Premix Summer Coolant and Antifreeze (4L) - Image 1](https://m.media-amazon.com/images/I/71Ki-7DD9yL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Quality Coolant.
*by M***. on 25 March 2025*

Very good quality coolant. Using it in my car for a year now and temps have been more stable. Definitely recommend it.

## Frequently Bought Together

- Castrol Radi Cool Premix Summer Coolant and Antifreeze (4L)
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**Shop now:** [https://www.desertcart.co.za/products/350599391-castrol-radi-cool-premix-summer-coolant-and-antifreeze-4l](https://www.desertcart.co.za/products/350599391-castrol-radi-cool-premix-summer-coolant-and-antifreeze-4l)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-28*