Hercules 15620 Real-Tuff Heavy Duty PTFE Pipe Thread Sealant White 8 oz | eBay
Hercules Pro Dope 8-fl oz Thread Sealant in the Pipe & Valve Lubricants department at Lowes.com
Slic-tite Paste with PTFE- Premium Thread Sealant Paste – markal.com
Ideal Vacuum | Swagelok, PTFE-Free Pipe Thread Sealant, 1.69 oz tube, Composed of particales of polyolefin resin and filler in a polymeric plasticizer, MS-TFS-50