As with MELAMINE, this thermosetting polymer is not a PHENOLIC, however its method of manufacture, forms, characteristics and applications are also of the "industrial laminate" type. The predominant difference between SILICONE and the other laminates is the considerably higher temperature resistance that SILICONE offers; almost as high as PTFE. Like the other laminates, a wide variety of fillers can be used to accentuate various properties. But the only important reinforcing medium to us is woven glass fabric. SILICONE reinforced with woven glass fabric, N.E.M.A. Grade G-7, in addition to its good temperature resistance, possess quite good dielectric loss, electrical insulation and arc resistance in humid conditions over a wide range of temperature. With the woven glass fabric, SILICONE has good physical properties but not as high as MELAMINE or Epoxy, but the impact strength of SILICONE is higher. Also, SILICONE possesses quite good flame resistance as well as UV resistance and ozone resistance. Due to its resistance to high temperature and its ability to retain much of its physical strength after prolonged exposure to high temperatures, laminated SILICONE actually has a higher strength-to-weight ratio, at elevated temperatures than do many metals. SILICONE has one of the lowest moisture absorptions of any of the other "industrial laminates". Although affected by concentrated acids and bases, SILICONE is more resistant to these chemicals than PHENOLIC or MELAMINE but not as resistant as Epoxy. Like MELAMINE and Epoxy, the machinability of SILICONE is good; but, as with all other materials reinforced with glass-fibres or fabric, tool-wear, even with carbide inserts, is quite high. Also, high quality finishes are only obtainable with expensive secondary operations. And, the production of glass particulate dusts in machining and grinding operations presents a serious health hazard. With a heavy loading of glass fabric, SILICONES, which are usually non-stick, will bond with polar adhesives.