CHEMFILM® DF1100 is a multilayer cast PTFE film, fully fused, with one surface modified to render it receptive to many conventional adhesives, elastomers, resins and potting compounds. The surface treatment was developed to assure that its application over pure PTFE would not degrade or discolor the basic film. After surface treatment, the PTFE film loses none of its excellent physical and electrical characteristics, except that the surface treatment results in a natural color which does not affect any of the desired properties. CHEMFILM type DF1200 is DF1100 laminated to 2 mils of acrylic pressure sensitive adhesive. - Uniform tensile properties in both machine and traverse direction. Isotropic shrinkage as a function of temperature. The unique bonding layer will adhere to a variety of adhesives and elastomers while the other surfaces maintain all the properties of PTFE. Pigments and other additives may be added to individual layers to customize performance. Superior performance in a wide range of chemical, thermal and electrical environments.