Fiberglass reinforced silicone rubber is most often specified because of its resistance to temperature extremes, moisture, weathering, radiation, fungus, and chemical attack, plus its high dielectric strength, flexibility, and cost effectiveness. Odd shapes, holes, cutouts, profiled watt densities, and multiple voltages are a few of the many features of custom-made silicone heaters. They can be directly bonded to heat sinks at the factory or applied with pressure sensitive adhesive (PSA). Fasteners including eyelets, lacing hooks, hook-and-pile straps, spring clips, and snaps are readily available.