Cooling system leaks are a common problem for vehicle owners and repair shops alike. Small radiator pinholes or slow seepage can lead to overheating, coolant loss, and expensive repairs if left untreated. Stop leak powder offers a fast, reliable solution when used correctly. Below is a step-by-step guide on how to use stop leak powder and why it works so well.

What Is Stop Leak Powder and How Does It Work?

Stop leak powder is designed to seal small leaks in a vehicle’s cooling system, such as radiators, heaters, freeze plugs, and gasket areas. When poured into the radiator, the powder mixes with hot coolant and antifreeze. Tiny fibers and pure metal particles travel through the system until they reach the leak point, where sealing resins harden under engine heat to form a durable, long-lasting seal.

Step-by-Step Guide: How to Use Stop Leak Powder

1. Prepare the Cooling System
Before application, ensure the radiator is filled to the proper level and free of scale or heavy contamination. A clean system allows the sealing agents to circulate and work efficiently.

2. Warm Up the Engine
Start the engine and allow it to reach normal operating temperature. The engine must be warm and running so the coolant can circulate properly.

3. Add the Stop Leak Powder
With the engine running, slowly pour the stop leak powder directly into the radiator. Make sure to follow the recommended dosage for the system size.

4. Run the Engine
Replace the radiator cap, turn the heater on, and run the engine at a fast idle for 10–15 minutes. This allows the powder to distribute throughout the cooling system and seal the leak.

5. Confirm the Seal
After circulation, the leak should be sealed. Monitor coolant levels and temperature to ensure normal operation.

When Should You Use Stop Leak Powder?

Stop leak powder is ideal for:

• Sealing pinhole-sized radiator leaks

• Preventing seepage in rebuilt or replaced engines

• Protecting new radiators, water pumps, heaters, or freeze plugs

• Supporting repairs during gasket or intake manifold replacement

It is not intended for major cracks or severely damaged components, which require mechanical repair.

Why Choose XPERTCHEMY® Stop Leak Powder?

For workshops, distributors, and wholesalers, XPERTCHEMY® Stop Leak Powder (24 tubes) delivers a simple pour-in application that seals leaks fast while remaining safe for all metals, plastics, and rubber components in the cooling system.

We offer XPERTCHEMY® Stop Leak Powder in convenient 24-tube wholesale packaging, making it an excellent choice for auto repair shops and parts suppliers looking for a reliable, high-demand cooling system solution.

Key Features at a Glance

• Seals most cooling system leaks quickly and permanently

• Compatible with all antifreeze types

• Safe for radiators, heaters, hoses, and gaskets

• Helps prevent future cooling system damage

• Easy to use with no special tools required

Final Thoughts

Using stop leak powder correctly can save time, reduce repair costs, and extend the life of a vehicle’s cooling system. With proper application, it provides a dependable fix for minor leaks and preventative protection for newly serviced components. For businesses seeking a trusted bulk solution, XPERTCHEMY® Stop Leak Powder offers performance, convenience, and consistent results.