Stop Leak

We have the car sealants you need. Whether you are looking to do some radiator repair, or you need engine sealant for a blown head gasket, we have powerful stop leak products that can seal small leaks in your vehicle's fluid-based systems, like AC, oil, and the cooling system. Stop problem leaks for good today with the right stop leak for you.

If you're looking to fix a tricky leak, check out Bar's Leaks types of stop leak products and find the right one for you.

Stop leak sealants work by swelling, plugging, meshing, or melting. Swelling stop leaks swell up rubber components like seals and gaskets to help them create a tighter seal with the parts surrounding them. Plugging sealants contain ceramic particles, metallic particles, and ground up almond shells that fill in holes when they are carried by leaking fluid. This is an easy way to stop leaks, and it is unobtrusive, with few, if any, potential side effects. Unfortunately, they are not permanent, and will often begin leaking again next time the system is flushed.

Meshing sealants are made with ceramic fibers or other fibrous materials that penetrate deep into damaged areas. As more fiber accumulates, they mesh together to form a plug that hardens with engine heat as the vehicle is used from that point on.

Sodium silicate is another sealant that is used for sealing leaks in hot parts of the engine, like the head gasket. Between 212- and 221-degrees Fahrenheit, the sodium silicate particles melt, allowing the melted particles to plug holes. Although these particles initially melt at normal engine temperatures, they have a much higher re-melting temperature, meaning they can make a long-lasting seal.

Leaks in the cooling system are generally caused by waiting too long to maintenance the system. For this reason, it is best to take action as soon as you notice a leak. One part of the system has gone bad, and another may go bad soon. Also, leak stopper is most effective when the leak is smaller.

Engine oil stop leak swells gaskets and seals by softening them. As such, you should ensure that the leak is coming from a gasket or seal before attempting this kind of repair. Power steering stop leak works the same way, and is used for sealing leaks in seals, gaskets, and O rings.

Head gasket repair sealants use sodium silicate which is melted by the engine's heat to seal up holes in the gasket where liquid drains and melted sodium silicate gathers.

No matter what sort of leak you're dealing with, we carry stop leak sealants from trustworthy brands like Bar's Leaks and Lucas Oil. If you need help finding the right product for you, talk to a store associate or use our online chat, then buy stop leak online and get free shipping with next day delivery or pick up your purchase in an AutoZone near you today.