Seals micro cracks and leakages in the cooling system

• Immediate action, avoids immobilization of the vehicle
• Compatible with all types of cooling fluids
• Can be used as preventive before a long trip to avoid any unexpected surprises

Motul Radiator Stop Leak 300ml – Cooling System Leak Sealer for Petrol & Diesel Engines

Seal Minor Cooling System Leaks & Protect Your Engine from Coolant Loss

Motul Radiator Stop Leak 300ml is a professional cooling system treatment designed to quickly seal minor leaks in radiators, heater cores, hoses, cylinder head gaskets (minor seepage), water pumps, and cooling system connections without disassembling the engine.

Its advanced sealing formula circulates with the coolant, locating small leaks and forming a durable seal where coolant is escaping. At the same time, it helps maintain cooling system efficiency, reduces coolant loss, and protects your engine from overheating caused by minor leaks.

Suitable for all liquid-cooled petrol and diesel engines, Motul Radiator Stop Leak is compatible with most types of antifreeze and coolants, making it an ideal preventive maintenance and emergency repair solution.

Key Features

• Quickly seals minor radiator and cooling system leaks
• Helps prevent coolant loss
• Protects against engine overheating caused by coolant leakage
• Seals small leaks in radiators, hoses, heater cores, water pumps, and cooling system joints
• Compatible with most coolant and antifreeze types
• Safe for aluminum, copper, brass, steel, and plastic cooling system components
• Helps extend cooling system reliability
• Easy-to-use, pour-and-go formula
• Suitable for petrol and diesel engines
• Ideal for preventive maintenance and emergency use

Ideal For

Motul Radiator Stop Leak is recommended for:

• Passenger cars
• SUVs
• Pickup trucks
• Petrol engines
• Diesel engines
• Hybrid vehicles with liquid-cooled engines
• Turbocharged vehicles
• Commercial vehicles
• Motorcycles with liquid-cooled engines

Compatible with:

• Organic Acid Technology (OAT) coolant
• Hybrid Organic Acid Technology (HOAT) coolant
• Conventional antifreeze
• Long-life coolant formulations

Benefits

Small coolant leaks can gradually lead to coolant loss, reduced cooling efficiency, and engine overheating if left untreated. Repairing these leaks often requires significant time and expense.

Motul Radiator Stop Leak provides a fast and effective solution by sealing minor leaks from inside the cooling system while allowing coolant to continue circulating normally. It helps maintain proper cooling performance, reduces coolant loss, and gives added protection until permanent repairs can be carried out if necessary.

Regular inspection of the cooling system is still recommended to identify any major mechanical issues.

How to Use

1. Ensure the engine is cool before opening the radiator or coolant reservoir.
2. Shake the bottle well before use.
3. Pour the entire bottle of Motul Radiator Stop Leak 300ml into the radiator or expansion tank.
4. Start the engine and allow it to reach normal operating temperature with the heater set to maximum.
5. Let the engine idle for approximately 10–15 minutes to circulate the product throughout the cooling system.
6. Check the coolant level after the engine has cooled and top up with the correct coolant if required.

Recommended Usage: Use only when minor coolant leaks are detected or as a temporary preventive solution before professional repair.

Suitable Applications

Ideal for:

• Minor radiator leaks
• Heater core leaks
• Small hose seepage
• Water pump seepage
• Cooling system joints
• Preventive cooling system maintenance
• Emergency roadside repairs
• Older cooling systems with minor coolant loss

Safety & Precautions

• Suitable only for minor cooling system leaks.
• It is not intended to repair major radiator damage, cracked engine blocks, burst hoses, or severe head gasket failures.
• Always allow the engine to cool before opening the cooling system.
• Follow the recommended dosage instructions.
• Store in a cool, dry place away from direct sunlight.
• Keep out of reach of children.
• Always consult a qualified technician if coolant loss continues after treatment.

Why Choose Motul Radiator Stop Leak?

Motul Radiator Stop Leak offers a fast, reliable solution for sealing minor cooling system leaks without dismantling the engine. Its advanced formula helps reduce coolant loss, maintain cooling efficiency, and protect against overheating, making it an excellent addition to every driver’s emergency maintenance kit.

Trusted by automotive professionals worldwide, Motul combines premium chemical technology with proven performance to help keep your vehicle operating safely and efficiently.

Why Buy from AutoHub Pakistan?

At AutoHub.pk, we supply only genuine automotive maintenance products from trusted global brands, ensuring quality and peace of mind with every purchase.

Benefits of Shopping with AutoHub

• 100% Genuine Motul products sourced from authorized distributors
• Fresh stock with guaranteed authenticity
• Competitive prices across Pakistan
• Fast nationwide delivery
• Secure online shopping experience
• Expert technical support and product recommendations
• Extensive range of premium engine oils, coolants, fuel additives, detailing products, and automotive maintenance solutions
• Trusted by workshops, professional detailers, and car enthusiasts throughout Pakistan

Frequently Asked Questions (FAQs)

What does Motul Radiator Stop Leak do?

It seals minor leaks in the radiator and cooling system to reduce coolant loss and help prevent engine overheating.

Can it repair a blown head gasket?

No. It may help seal minor seepage in some cases, but it is not a repair solution for blown head gaskets, cracked cylinder heads, or damaged engine blocks.

Is it safe for aluminum radiators?

Yes. It is compatible with aluminum, copper, brass, steel, and plastic cooling system components when used as directed.

Can I use it with any coolant?

Yes. It is compatible with most modern antifreeze and coolant formulations that meet the vehicle manufacturer’s specifications.

Does it clog the radiator?

When used according to the recommended dosage, it is formulated to seal minor leaks without clogging a properly functioning cooling system.

How long does the seal last?

The durability depends on the size and location of the leak. It is intended for minor leaks and should not replace proper mechanical repairs where required.

Can I drive immediately after adding the product?

Yes. After circulating the product by allowing the engine to reach operating temperature, the vehicle can be driven normally while monitoring coolant levels.

Should I still repair the leak permanently?

Yes. While Motul Radiator Stop Leak is effective for minor leaks, any persistent coolant leak should be professionally inspected and repaired.

Motul Radiator Stop Leak 300ml

• Motul Radiator Stop Leak
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• Cooling System Leak Treatment
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