Description

LIQUI MOLY Radiator Stop Leak 250ml – Quick Sealant for Radiator & Cooling System Leaks

LIQUI MOLY Radiator Stop Leak 250ml is a fast-acting coolant system sealer designed to stop small leaks in radiators, heater cores, water pumps, and other cooling circuit components. Engineered in Germany, this advanced formula seals cracks and pinholes instantly—helping prevent coolant loss and protecting your engine from overheating.

This product is compatible with all types of antifreeze, including OAT, HOAT, and traditional coolants, and it does not require draining or flushing. Safe for aluminum radiators, plastic components, and rubber hoses, LIQUI MOLY Radiator Stop Leak offers a simple and affordable repair solution for minor cooling system leaks.

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Key Features

✔ Effective Leak Sealing

Forms a durable seal to stop small leaks in radiators, heater cores, cylinder heads, and hoses.

✔ Universal Coolant Compatibility

Works with all coolant types—conventional, OAT, HOAT, G12/G13, etc.

✔ Corrosion Protection

Contains corrosion inhibitors that help prevent rust, scale, and oxidation inside the cooling system.

✔ Safe for All Engines

Can be used in petrol, diesel, hybrid, and turbocharged engines.

✔ Easy Pour-In Formula

No tools required. Simply add to the radiator or coolant reservoir.

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Benefits

🔧 Prevents Coolant Loss

Stops leaks quickly to maintain proper coolant levels and sustain cooling efficiency.

💰 Cost-Effective Repair

Avoid expensive radiator or heater core repairs by sealing small leaks instantly.

🔥 Protects from Overheating

Helps stabilize engine temperature, preventing overheating and engine damage.

⏳ Extends Cooling System Life

Corrosion protection helps maintain clean coolant passages and prolongs component lifespan.

🚗 Suitable for All Vehicles

Ideal for cars, vans, SUVs, trucks, and motorcycles.

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LIQUI MOLY Radiator Stop Leak Price in Sri Lanka

The price of LIQUI MOLY Radiator Stop Leak 250ml in Sri Lanka generally ranges between:

👉 Rs. 2,500 – Rs. 5,500

Price may vary depending on supplier and location. For the most accurate pricing, check authorized LIQUI MOLY dealers or trusted online automotive stores.

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How to Use LIQUI MOLY Radiator Stop Leak (Step-by-Step)

1. Ensure engine is cool before opening the radiator cap or reservoir.

2. Shake the bottle well.

3. Pour the full recommended amount into the radiator or coolant reservoir.

4. Start the engine and turn on the heater.

5. Let the engine idle for 10–15 minutes to circulate the product.

6. Check coolant level and top up if required.

7. Monitor the system for improvement.

👉 Note: This product is designed for small leaks. For major leaks or repeated coolant loss, consult a mechanic.

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Technical Data

• Form: Liquid

• Color/Appearance: White, cloudy

• Density at 20°C: 1.05 g/cm³

• Water Solubility: Mixable

• Odor: Mild

• Flashpoint: >100°C

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Areas of Application

• Radiators

• Heater cores

• Water pumps

• Cooling circuits of cars, trucks, and motorcycles

• Suitable for systems using water filters (except low-conductivity coolants)

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Application Details

• Shake well before use.

• Add to cold cooling system.

• Start heater.

• Drive for at least 10 minutes.

• 150ml treats up to 7L of coolant

• 250ml treats up to 10L of coolant

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Conclusion

LIQUI MOLY Radiator Stop Leak 250ml is a reliable, fast, and cost-effective solution for sealing minor radiator and cooling system leaks. With universal compatibility, corrosion protection, and hassle-free application, it helps maintain engine performance and prevents overheating—making it an essential product for emergency cooling system repairs.

For quick leak sealing, long-term protection, and peace of mind, LIQUI MOLY Radiator Stop Leak is one of the best radiator additives available in Sri Lanka.