Thread Sealing Cord provides instant full pressure sealing. Allows for dependable re-adjustments. LOCTITE® 55 is a sealant for metal and plastic pipes and fittings. It requires no curing time and produces an immediate, full pressure seal. The ideal choice for a quick, simple, and dependable seal. The product is approved for gas and potable water and is NSF/ANSI Standard 61 certified. General purpose, threaded pipe and fitting sealant For a quick, easy and reliable seal Non-curing, immediate, full-pressure seal Tested in accordance with EN 751-2 Class ARp and DIN 30660 DVGW/KTW approval for gas and potable water Certified to NSF/ANSI, Standard 61