K-Seal

K-Seal ST5516 is a heavy-duty, one-step coolant leak repair that pours into any coolant system to seal holes, cracks, and leaks without flushing. Designed for large engines and industrial applications, this 16 oz K-Seal concentrate mixes with any antifreeze and works while the engine...

K-Seal ST3501 Pour & Go is a 16 oz ready-to-use coolant sealer that repairs blown head gaskets, hairline cracks in cylinder heads and porous engine blocks without engine disassembly. When a coolant leak threatens engine operation, K-Seal ST3501 offers a straightforward, non-invasive repair option....