Pure Gum Rubber Vacuum Forming Bladder / Gasket Material (1/16" Thick x 24"(2ft) x 48") Pure gum rubber is a full floating natural rubber This flexible rubber has excellent pliability and compressibility Tan Gum rubber with minimum tensile strength of 2850PSI (19.5 MPA) Natural rubber is a soft rubber with a durometer of 35-45 and offers excellent elasticity Excellent choice for vacuum forming / molding