Kalimex is a UK-based manufacturer focused on innovative automotive repair chemicals, with its flagship product range, K-Seal, widely recognised across workshops and DIY users alike. Designed to provide a permanent, internal repair, K-Seal products seal leaks in head gaskets, radiators, heater matrices, engine blocks, and cooling systems while the engine is running. Unlike temporary sealants, K-Seal uses a scientifically engineered formula that circulates with coolant and reacts at the precise point of pressure loss, forming a durable seal that withstands heat, pressure, and vibration. It does not clog radiators, hoses, or thermostats and is compatible with petrol, diesel, hybrid engines, and all common coolant types. Kalimex K-Seal products are frequently used as a cost-effective alternative to major engine strip-downs, helping extend engine life and reduce downtime. Trusted by professional mechanics and motorists worldwide, Kalimex offers reliable solutions for addressing coolant leaks quickly, safely, and effectively.