---
product_id: 258773006
title: "9966 Germany Radiator Leak Stop, 325ml"
brand: "mannol"
price: "A$16"
currency: AUD
in_stock: true
reviews_count: 8
category: "Mannol"
url: https://www.desertcart.com.au/products/258773006-9966-germany-radiator-leak-stop-325ml
store_origin: AU
region: Australia
---

# Heat & vibration resistant Seals micro leaks & cracks Universal coolant compatibility 9966 Germany Radiator Leak Stop, 325ml

**Brand:** mannol
**Price:** A$16
**Availability:** ✅ In Stock

## Summary

> 🚗 Seal the deal, drive leak-free with MANNOL 9966!

## Quick Answers

- **What is this?** 9966 Germany Radiator Leak Stop, 325ml by mannol
- **How much does it cost?** A$16 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/258773006-9966-germany-radiator-leak-stop-325ml)

## Best For

- mannol enthusiasts

## Why This Product

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

## Key Features

- • **Quick results:** Stops leaks effectively within 50-100 km of driving, saving time and money
- • **Precision sealing:** Targets only leak areas, preventing future coolant loss and engine damage
- • **Leak-proof confidence:** Seals gaskets, clamps, and micro cracks without clogging radiator tubes
- • **Long-lasting durability:** Withstands temperature fluctuations and vibrations without washing out
- • **Universal compatibility:** Works seamlessly with any coolant or water for hassle-free use

## Overview

MANNOL 9966 Germany Radiator Leak Stop is a 325ml additive designed to seal leaks in cooling systems by targeting gaskets, clamps, and micro cracks. Compatible with all coolants and water, it cures only at leak points without clogging radiator tubes. Its hardened formula resists vibration and temperature changes, ensuring long-lasting protection and preventing future leaks.

## Description

Designed as per the prevailing industry standards, it scores high on the aspect of utility. The quality material used in it's construction makes it durable.

Review: Excellent Product - Had a small leakage since the last 3 months, after adding was repaired witin a 100KM drive.
Review: Recommended - Excellent product, the coolant leak stopped after driving 50Km. It is qualified item and recommended.

## Features

- Compatible with any coolant as well as water Seals the cooling system and eliminates leaks through gaskets, clamps, small cracks in the radiator, cylinder head gaskets, from the water pump and from the cylinder block itself. Prevents leaks in the future
- Cures only in places of leaks, without clogging the radiator tubes. After hardening, withstands vibration, temperature changes, does not wash out, does not dissolve
- It is especially recommended for sealing micro cracks and micro leaks, the places of which are difficult to determine, but due to which there is a drop in the level of the coolant

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0050CIV5O |
| Best Sellers Rank | #928 in Automotive ( See Top 100 in Automotive ) #19 in Oil & Fluid Additives |
| Brand | MANNOL |
| Customer Reviews | 4.0 4.0 out of 5 stars (90) |
| Date First Available | 8 January 2015 |
| Item Weight | 300 g |
| Item model number | 9966 |
| Manufacturer | MANNOL |
| Manufacturer Part Number | 9966 |
| Product Dimensions | 12 x 10 x 3 cm; 300 g |
| Voltage | 12 Volts |

## Images

![9966 Germany Radiator Leak Stop, 325ml - Image 1](https://m.media-amazon.com/images/I/611BcP-ZCYL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent Product
*by R***L on 7 February 2025*

Had a small leakage since the last 3 months, after adding was repaired witin a 100KM drive.

### ⭐⭐⭐⭐⭐ Recommended
*by M***Y on 22 April 2025*

Excellent product, the coolant leak stopped after driving 50Km. It is qualified item and recommended.

### ⭐ For 8 liters system I put two bottles and doesn’t work
*by Q***Q on 11 June 2025*

I used two full bottles in the car radiator and still the same issue leak doesn’t stop

## Frequently Bought Together

- MANNOL 9966 Germany Radiator Leak Stop, 325ml
- Turbo Radiator Coolant Green 1Gln
- Mannol HTE - Germany (9965 2 Pc Pack Radiator Flush Cleaner)

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**Shop now:** [https://www.desertcart.com.au/products/258773006-9966-germany-radiator-leak-stop-325ml](https://www.desertcart.com.au/products/258773006-9966-germany-radiator-leak-stop-325ml)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-18*