Description 0.4 density, 0.003" thick. Over 50% elongation and chemically inert. Provides a strong tight seal for any threaded joint and permits easy disassembly. Tolerates -400 to + 500 degree Fahrenheit. Suitable for use on oxygen systems. Non-toxic and non-flammable. Meets Federal Specification T-27730A. WARNING: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer, birth defects or reproductive harm and Butyl Benzyl phthalate (BBP) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov