Tuf-Glide Thread Sealant with PTFE. 
FBC™ System Compatible 
Easy to apply, eliminates leaks, sticks to oily pipe, less dripping. 
10,000 psi, up to 500° F. 
Made in USA 

FBC™ System Compatible indicates that this product has been tested, and is monitored on an ongoing basis, to assure its chemical compatibility with FlowGuard Gold®, BlazeMaster® and Corzan® piping systems and products made with TempRite® Technology.” “The FBC System Compatible Logo, FBC™, FlowGuard Gold®, BlazeMaster®, Corzan®, and TempRite® are trademarks of Lubrizol Advanced Materials, Inc. or its affiliates.