---
product_id: 258773006
title: "9966 Germany Radiator Leak Stop, 325ml"
brand: "mannol"
price: "66 zł"
currency: PLN
in_stock: true
reviews_count: 13
category: "Mannol"
url: https://www.desertcart.pl/products/258773006-9966-germany-radiator-leak-stop-325ml
store_origin: PL
region: Poland
---

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

**Brand:** mannol
**Price:** 66 zł
**Availability:** ✅ In Stock

## Summary

> 🚗 Stop leaks before they stop you – drive worry-free with MANNOL!

## Quick Answers

- **What is this?** 9966 Germany Radiator Leak Stop, 325ml by mannol
- **How much does it cost?** 66 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/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

- • **Precision curing:** Hardens only at leak points, ensuring no blockage or damage to the cooling system
- • **Leak-proof confidence:** Seals gaskets, clamps, and micro cracks without clogging radiator tubes
- • **Future-proof protection:** Prevents new leaks, keeping your engine cool and worry-free
- • **Universal compatibility:** Works seamlessly with any coolant or water for hassle-free use
- • **Durability under pressure:** Withstands temperature fluctuations and vibrations without washing out

## Overview

MANNOL 9966 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 hardens only at leak sites, resisting heat, vibration, and washout to provide durable, long-lasting protection and prevent 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 | #7,131 in Automotive ( See Top 100 in Automotive ) #74 in Oil & Fluid Additives |
| Brand | MANNOL |
| Customer Reviews | 4.0 4.0 out of 5 stars (92) |
| 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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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-04-22*