---
product_id: 51767519
title: "Radiator Cleaner | 300 ml | Cooler additive | SKU: 1804"
brand: "liqui moly"
price: "€ 26.73"
currency: EUR
in_stock: true
reviews_count: 13
category: "Liqui Moly"
url: https://www.desertcart.hr/products/51767519-radiator-cleaner-300-ml-cooler-additive-sku-1804
store_origin: HR
region: Croatia
---

# Concentrated 300 ml formula High-temp deposit dissolver Protects engine components Radiator Cleaner | 300 ml | Cooler additive | SKU: 1804

**Brand:** liqui moly
**Price:** € 26.73
**Availability:** ✅ In Stock

## Summary

> 💥 Clear the heat, feel the power – your engine’s secret weapon!

## Quick Answers

- **What is this?** Radiator Cleaner | 300 ml | Cooler additive | SKU: 1804 by liqui moly
- **How much does it cost?** € 26.73 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/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

- • **Safeguard Your Engine's Heart:** Prevents wear by clearing thermostatic valves and regulators
- • **Concentrated Power in Every Drop:** 300 ml formula designed for maximum cleaning impact
- • **Blast Away Heat-Blocking Deposits:** Dissolves stubborn radiator sludge for peak cooling efficiency
- • **Trusted by Over 1,000 Enthusiasts:** 4.5-star rated with proven results on premium vehicles
- • **Restore Optimal Heating Performance:** Revives your car’s heating system for cozy drives

## Overview

LIQUI MOLY Radiator Cleaner is a concentrated 300 ml additive engineered to dissolve heat-blocking deposits in your vehicle’s radiator and cooling system. By clearing thermostatic valves and regulators, it restores optimal heat exchange and protects your engine from wear and damage. Highly rated with over 1,000 reviews, this formula ensures efficient engine operation and improved heating performance.

## Description

Buy LIQUI MOLY Radiator Cleaner | 300 ml | Cooler additive | SKU: 1804 at desertcart UK. Free delivery on eligible orders.

Review: It works - I used only half a bottle for my audi a4 2.0 hdi year 2011. Worked as expected, good product.
Review: Works really well. - 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.

## 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.
- The deposits in the radiator / heating system form a barrier for the exchange of heat,
- block thermostatic valves and the mechanisms of the regulator. Very high operating temperatures
- induce an economic operation of the engine, with a high risk of wear and damage.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00U9BP9QA |
| Best Sellers Rank | 1,901 in Automotive ( See Top 100 in Automotive ) 35 in Antifreeze & Coolants |
| Brand | Liqui Moly |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,018) |
| Date First Available | 5 April 2015 |
| Item Weight | 300 g |
| Item model number | 1804 |
| Manufacturer | Liqui Moly |
| Manufacturer part number | P000197 |
| Model | 4100420018046 |
| Product Dimensions | 12 x 6 x 6 cm; 300 g |
| Special Features | Concentrated |

## 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(s)

## 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

### ⭐⭐⭐⭐⭐ It works
*by M***U on 24 December 2025*

I used only half a bottle for my audi a4 2.0 hdi year 2011. Worked as expected, good product.

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Very good indeed, worth it.
*by E***D on 17 January 2026*

Worked a treat. Highly recommend. Cleaned out some old rad weld (2 flushes).

## 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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**Shop now:** [https://www.desertcart.hr/products/51767519-radiator-cleaner-300-ml-cooler-additive-sku-1804](https://www.desertcart.hr/products/51767519-radiator-cleaner-300-ml-cooler-additive-sku-1804)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-01-25*