Experience the ultimate solution to coolant leaks with the K-Seal ST5516 HD, a multi-purpose, one-step permanent coolant leak repair. Our powerful formula works seamlessly with all antifreeze, making it a universal fit type for all your needs.
Used it in a detroit 8.2 diesel motor with a bad headgasket. Poured it directly into the block by removing the thermostat. Shook well like instructions said. Did not work.