Quick & Easy Fix for Radiator Leaks and Seepage StopLeak® Powder offers a fast, convenient solution for minor radiator leaks and cooling system seepage. This easy-to-use formula plugs pinhole leaks and helps prevent future seepage, making it a trusted go-to for drivers. Designed for convenience and packaged to stand out, it’s perfect for both emergency repairs and preventative maintenance.

StopLeak® Powder

Plugs Pinhole Radiator Leaks

Effectively seals small leaks and hairline cracks in radiators, heater cores, and cooling system connections to prevent coolant loss.

Prevents Seepage

Creates a protective barrier within the system to help stop and prevent recurring seepage and minor leaks over time.

Simple Pour-In Application

No tools, mixing, or draining required, just pour directly into the radiator or overflow tank for fast, hassle-free use.

Ideal for Older or High-Mileage Vehicles

Great for vehicles showing signs of minor wear or occasional leaks due to age or mileage.

Attractive Point-of-Purchase Packaging

Eye-catching, compact design makes it a perfect retail counter or shelf item for impulse and emergency buys.

Ideal For:

• Sealing pinhole radiator or cooling system leaks

• Preventing recurring seepage in older systems

• Emergency repair kits and glovebox storage

• Budget-conscious drivers and DIY mechanics

• Quick fixes between full services

Why Choose StopLeak® Powder?

It’s the quick, pour-and-go solution that delivers effective results when you need them most, no tools, no mess, just reliable sealing power in a compact, retail-ready package.