---
product_id: 51767519
title: "Radiator Cleaner | 300 ml | Cooler additive | SKU: 1804"
brand: "liqui moly"
price: "$27.23"
currency: USD
in_stock: true
reviews_count: 13
category: "Liqui Moly"
url: https://www.desertcart.us/products/51767519-radiator-cleaner-300-ml-cooler-additive-sku-1804
store_origin: US
region: United States of America
---

# cleans in 10-30 minutes dissolves lime & oil deposits 300 ml concentrated formula Radiator Cleaner | 300 ml | Cooler additive | SKU: 1804

**Brand:** liqui moly
**Price:** $27.23
**Availability:** ✅ In Stock

## Summary

> 🔥 Clean your radiator, cool your ride — fast and flawless!

## Quick Answers

- **What is this?** Radiator Cleaner | 300 ml | Cooler additive | SKU: 1804 by liqui moly
- **How much does it cost?** $27.23 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/51767519-radiator-cleaner-300-ml-cooler-additive-sku-1804)

## Best For

- liqui moly enthusiasts

## Why This Product

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

## Key Features

- • **Powerful Concentrate:** 300 ml of high-performance radiator cleaner designed for all vehicle cooling systems.
- • **Rapid Action Formula:** Effectively dissolves stubborn lime and oil deposits within 10 to 30 minutes, restoring optimal heat exchange.
- • **Universal Compatibility:** Safe and suitable for motor vehicles, buses, and commercial vehicles’ cooling and heating systems.
- • **Trusted by Professionals:** Highly rated with 4.5 stars from over 1,100 reviews, proven to unblock radiators and heater matrices efficiently.
- • **Prevents System Blockages:** Removes deposits that block thermostats and regulating mechanisms, ensuring smooth engine temperature control.

## Overview

Liqui Moly Radiator Cleaner is a 300 ml concentrated additive formulated to dissolve lime and oil deposits in vehicle cooling systems. Compatible with cars, buses, and commercial vehicles, it prevents blockages that impair heat exchange and thermostat function. With a quick 10-30 minute treatment time and a strong reputation backed by 1,184 reviews, it’s a must-have for maintaining peak engine cooling performance.

## Description

A concentrate specially developed for cooling systems in general but particularly those in motor vehicles. Dissolves contaminants containing lime and oil in radiators, heating systems, pipes and in engines. Modern formula containing complexants with active cleaning agents.

Review: Effective cooling system flush - Probably the best cooling system flush I’ve ever used. Very effective. Will certainly buy again
Review: Fantastic stuff - Fantastic stuff, used two bottles of it on a transits oil cooler failed and the water turned to oily goo it unblocked my radiator and heater matrix only issue I found it was kinda boring stood there for 30 mins watching it turn the goo back into water

## Features

- Causes serious eye damage.
- Contains REACTION MASS OF 5-CHLORO-2-METHYL-2H-ISOTHIAZOL-3-ONE AND 2-METHYL-2H-ISOTHIAZOL-3-ONE (3:1). May produce an allergic reaction.
- Contains reaction mass (3:1) of 5-chloro-2-methyl-2H-isothiazol-3-one and 2-methyl-2H-isothiazol-3-one. May produce an allergic reaction.
- Contains reaction mass of 5-chloro-2-methyl-2H-isothiazol-3-one and 2-methyl-2Hisothiazol-3-one (3:1). May produce an allergic reaction.
- Suitable for all cooling water systems in motor vehicles, buses and commercial vehicles.
- Deposits in the cooling/heating system form barriers against heat exchange, blocking the thermostat and regulating mechanisms.
- Add contents to the cooling water. Run the heating system. Depending on the degree of contamination let the engine run approximately 10 to 30 minutes. Drain the cleaner and flush out the cooling system with water.
- Item Package Dimension: 19.0cm L x 5.3cm W x 5.3cm H

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00U9BP9QA |
| Best Sellers Rank | 4,707 in Automotive ( See Top 100 in Automotive ) 57 in Antifreeze & Coolants |
| Brand | Liqui Moly |
| Brand Name | Liqui Moly |
| Contains Liquid Contents? | Yes |
| Customer Reviews | 4.5 out of 5 stars 1,184 Reviews |
| Global Trade Identification Number | 04100420018046 |
| Item Form | Liquid |
| Item Volume | 300 Millilitres |
| Item Weight | 0.3 Kilograms |
| Item form | Liquid |
| Item volume | 300 Millilitres |
| Manufacturer | Liqui Moly |
| Material Features | Scented |
| Material feature | Scented |
| Model Number | 1804 |
| Number of Items | 1 |
| Part Number | P000197 |
| Scent | Liqui Moly |
| Size | 300 ml (Pack of 1) |
| Special Features | Concentrated |
| Specific Uses For Product | Drain |
| Specific uses for product | Drain |
| Surface Recommendation | Drain |
| Unit Count | 300.0 millilitre |

## Product Details

- **Brand:** Liqui Moly
- **Item form:** Liquid
- **Item volume:** 300 Millilitres
- **Material feature:** Scented
- **Number of items:** 1
- **Scent:** Liqui Moly
- **Special feature:** Concentrated
- **Specific uses for product:** Drain
- **Surface recommendation:** Drain
- **Unit count:** 300.0 millilitre

## Images

![Radiator Cleaner | 300 ml | Cooler additive | SKU: 1804 - Image 1](https://m.media-amazon.com/images/I/81Yc0cjbeTL.jpg)

## Questions & Answers

**Q: Is this compatible with mercedes benz 325 ?  its for a 2012 s350 bluetec.**
A: Yes it should be absolutely fine and ideal for every radiator as its just detergent based and not acidic and therefore not harmful. Domt run the engine for too long with it in there 10-20 mins max.

**Q: I’ve not done a coolant change on my 2013 Audi A5 since 2016, this good to put in before changing coolant? Cars done 40k since last coolant change**
A: Yes good product works wonders, make sure to flush twice with clean water after use before filling with coolant

**Q: Will this remove head gasket repair fluid lurking after failed head gasket sealing attempt?**
A: It could start leaking if the cooling system was sealed. I’m not a scientist but it is recommended to keep the sealing agent in the coolant. Not necessarily to flush. Just change.

**Q: my engine takes around 17ltr of coolant how many bottles would i need ?**
A: It’s detergent. The foam does it’s job. You can pour 2 if you want. Just run it 30 min if it is very dirty coolant.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Effective cooling system flush
*by S***T on 8 May 2026*

Probably the best cooling system flush I’ve ever used. Very effective. Will certainly buy again

### ⭐⭐⭐⭐⭐ Fantastic stuff
*by K***R on 8 February 2026*

Fantastic stuff, used two bottles of it on a transits oil cooler failed and the water turned to oily goo it unblocked my radiator and heater matrix only issue I found it was kinda boring stood there for 30 mins watching it turn the goo back into water

### ⭐⭐⭐⭐⭐ Works really well.
*by F***Z on 24 December 2025*

Cleaned out the system nicely, found some large lumps when i used this and then drained the coolant. I noticed my heating wasn't coming on so used this and now the air heats up nicely.

## Frequently Bought Together

- LIQUI MOLY Radiator Cleaner | 300 ml | Cooler additive | SKU: 1804
- LIQUI MOLY Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2427
- LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-04*