Chemfab standard series offers the optimum balance of PTFE content, strength and durability at an economical price. Controlled porosity/openings. Standard Grade fabrics are designed to provide outstanding value in many common applications and are often the logical starting point when determining the right product for a new application. - Chemfab CF210 is a smooth and mechanically strong PTFE-coated fabric. They retain their stability and properties at continuous operating temperatures from -150 to 260 °C. If non-flammability or fire resistance is required. Chemfab PTFE fabrics are the solution for many applications.