Just a FYI for those that aren’t aware of this product …
I personally have made good use of this stuff for years … and ALL my Copper torches threads wear it. 
Great stuff! 
Been using it for 10 years. For my battery terminals….boat and car, my torches,threads and more, squeaky doors and more.It lasts a long,long time in regards to the application( Don’t need much) as far as the amount, and the longevity of the product.
It’s even safe to use on Deli equipment, meat slicing machines. Non-toxic.