SENTINEL 1 LT SEALANT FOR SMALL WATER LEAKS FOR HEATING SYSTEM Sentinel Liquid Sealant is a quick and easy solution to seal small leaks and leaks that are not perfectly sealed and do not need immediate repair. Ready for use, it quickly enters the system water, where it forms a non-rigid seal, usually within 24 hours, although the time may vary depending on the type of leak and the temperature. It is suitable for all types of heating systems and compatible with all types of metals, including aluminum, and plastic materials and with the other Sentinel additives found in the system.
eBay