K&W

Stop Leaks… Start Driving!™ K&W has delivered the best DIY leak solutions since 1938 when it introduced Permanent Metallic™ Block Seal, one of the first coolant additives to provide permanent repair. From head gaskets and engine blocks to automatic transmissions and power steering, K&W stop leak products for aging vehicles are affordable and effective alternatives to costly repairs and parts replacements.

FIX MY LEAK