Ptfe coated fiberglass fabrics are manufactured from woven fiberglass substrates, possess an optimal ptfe content, they provide the highest value to customers by offering an excellent balance between heat transfer, release, and flexibility. This series of fabrics are ideal to be used for the outer layer of a removable insulation jacketing system for they provide tough resistance to water, oil, chemica and heat while they are flexible and easy to be fabricated into removable insulation jackets, covers or pads that can provide continued protection up to 550°f (288°c).