Permabond LH056 is a thread sealant designed for use in sealing metal pipes and fittings in sprinkler systems which may also contain CPVC piping. 
  Permabond LH056 is FBC System Compatible. 
Prevents leaks even on pipes that are not completely seated. 
Anaerobic thread sealants form an instant seal, and once fully cured, will surpass the burst rating of most piping systems. 
Locks the pipes or fittings against vibration loosening, tampering and variable temperature effects.