What are Mil-Specs?
A. Collapsible Fuel Tanks were first invented in the 1950’s and were originally made from rubber. In the 1980’s the US Military began developing collapsible fuel tanks made from poly-urethane to make the product lighter. The US Military developed these fabrics under Military Specifications (US Mil-Spec). Mil-Specs defined the fabric and tank manufacturing methods for collapsible fuel tank. Under this system manufacturers would make their product according to the instructions set out by the military. The US Mil-Spec attempted to develop a single type of tank for use in with all fuels in all environments. Due to tank problems the US Military adopted a purchase description method of procurement in 2003. Mil-Specs are still commonly used to describe the fabrics to make collapsible fuel tanks but the US Military does not purchase under the Mil-Spec program anymore. The fabrics, seams, seaming method and tank designs used to make SEI’s Arctic, Desert and Jungle King Tanks are proprietary to
