This is not standard plumbers tape. It's military grade high-density, high-pressure, high-temp and heavy duty. It's manufactured for use with all metals including stainless steel.
Made in the USA
Thickness : 3.5 mils (.0035")
Density : 1.525
Specifications : Mil-T-27730A, A-A 58092, FDR 21CFR 177.1550
Minumium pressure rating : 10,000 PSI
Temperature range : -450° to 550° F
Unlimited shelf life, will not harden or deteriorate