Stops and seals antifreeze/coolant leaks. Bar’s Leaks Radiator Stop Leak 2X Concentrate Sealer is specially designed to stop minor to moderate cooling system leaks and drips caused by normal cooling system wear and age. It works with ALL types and colors of antifreeze coolant and/or water. Which is one of our commitments to customers: no matter what product you choose, our radiator stop leak or something else entirely, you can also count on effectiveness and ease-of-use. There’s no special automotive expertise needed to fix a radiator leak with Bar’s Leaks.
NOTE: Cooling systems that are dirty or partially clogged should be flushed before usage.
Shake well. Pour Stop Leak into a cool radiator. If direct access to radiator is not available, install in overflow/reservoir tank. Fill radiator and overflow tank to proper level and reinstall cap. Drive/idle engine for 15 to 30 minutes. If leak continues, a second application may be required, or mechanical attention is needed. After successful installation, Leave Bar’s Leaks in the cooling system for continued protection.