Pipe thread sealnt/industrial liquid thread sealant Luoke manfactures five loctite equivalent items with different viscosity, ... reliability, easier to use, Pipe thread sealnt, industrial liquid thread sealant direction of pipe thread can be adjusted in a certain ... won't clog valves and filtration systems. LK554 Frozen system sealant. Excllent chemical resistance, especially suitable for the R11, R12 ...