LA-CO Slic-Tite Stik Thread Sealants w/PTFEs Designed for professional servicemen and mechanics. Do not use on Oxygen service, use PTFE Tape or Oxytite Paste. High-performance thread compound in handy stick form. Non-toxic, non-staining, non-drying. Use on metal and PVC pipe thread connections for water, air, natural gas, steam, gasoline, oil, refrigerants and ammonia Pack of 1