---
product_id: 258773006
title: "9966 Radiator Leak Stop 325ml, Cooling System Sealant Additive, Coolant Leak Sealer for Radiators, Heater Core, Water Pump, Gaskets, Clamps & Small Cracks, Treats up to 12L"
brand: "mannol"
price: "₨198"
currency: SCR
in_stock: true
category: "Mannol"
url: https://www.desertcart.sc/products/258773006-9966-radiator-leak-stop-325ml-cooling-system-sealant-additive-coolant
store_origin: SC
region: Seychelles
---

# Compatible with coolant & water Treats up to 12L cooling systems Seals micro leaks fast 9966 Radiator Leak Stop 325ml, Cooling System Sealant Additive, Coolant Leak Sealer for Radiators, Heater Core, Water Pump, Gaskets, Clamps & Small Cracks, Treats up to 12L

**Brand:** mannol
**Price:** ₨198
**Availability:** ✅ In Stock

## Summary

> 💧 Stop leaks before they stop you — MANNOL 9966 keeps your engine cool and in control!

## Quick Answers

- **What is this?** 9966 Radiator Leak Stop 325ml, Cooling System Sealant Additive, Coolant Leak Sealer for Radiators, Heater Core, Water Pump, Gaskets, Clamps & Small Cracks, Treats up to 12L by mannol
- **How much does it cost?** ₨198 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/258773006-9966-radiator-leak-stop-325ml-cooling-system-sealant-additive-coolant)

## 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

- • **Optimal Dosage:** 325ml bottle treats up to 12L cooling systems—perfect for most vehicles
- • **Leak-Proof Confidence:** Seals small radiator, gasket & pump leaks before they escalate
- • **Broad Material Support:** Safe for aluminium, copper, plastic & composite radiators
- • **Universal Compatibility:** Works seamlessly with all coolant types and water for versatile use
- • **Temporary Fix, Smart Move:** Ideal for quick micro-leak stops; buy now to avoid costly repairs later

## Overview

MANNOL 9966 Radiator Leak Stop is a 325ml cooling system sealant additive designed to quickly seal small leaks in radiators, heater cores, water pumps, gaskets, clamps, and minor cracks. Compatible with all coolant types and water, it treats cooling systems up to 12 liters and supports a wide range of radiator materials including aluminium, copper, plastic, and composite. Ideal as a temporary or preventive solution to avoid costly mechanical repairs.

## Description

Buy MANNOL 9966 Radiator Leak Stop 325ml, Cooling System Sealant Additive, Coolant Leak Sealer for Radiators, Heater Core, Water Pump, Gaskets, Clamps & Small Cracks, Treats up to 12L online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Asin | B0050CIV5O |
| Best Sellers Rank | #6,369 in Automotive (See Top 100 in Automotive) #60 in Oil & Fluid Additives |
| Brand | MANNOL |
| Customer Reviews | 3.9 3.9 out of 5 stars (93) 3.9 out of 5 stars |
| Date First Available | 8 January 2015 |
| Item Model Number | 9966 |
| Item Weight | 300 g |
| Manufacturer | MANNOL |
| Manufacturer Part Number | 9966 |
| Product Dimensions | 12 x 10 x 3 cm; 300 g |
| Voltage | 12 Volts |

## Images

![9966 Radiator Leak Stop 325ml, Cooling System Sealant Additive, Coolant Leak Sealer for Radiators, Heater Core, Water Pump, Gaskets, Clamps & Small Cracks, Treats up to 12L - Image 1](https://m.media-amazon.com/images/I/611BcP-ZCYL.jpg)

## 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.sc/products/258773006-9966-radiator-leak-stop-325ml-cooling-system-sealant-additive-coolant](https://www.desertcart.sc/products/258773006-9966-radiator-leak-stop-325ml-cooling-system-sealant-additive-coolant)

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-09-01*