Profile: National Plastic Heater, Sensor And Control Inc. designs & distributes flexible, silicone rubber, and explosion-proof drum heaters. Our products are used as critical components for plastic, packaging, medical, semi-conductor processing, food service, power generation, petroleum, water purification, and automotive industries. Silicone rubber heater consists of many layers of silicone rubber sheets that are bonded together through heat & high pressure. A fiberglass grid re-inforces the silicone rubber sheets. Fiberglass is covered with a thin layer of silicone. A uniformly spiraled resistance wire web that covers the entire surface of the heater is embedded within the layers of silicone rubber. This web can be designed such that holes and cut-outs are incorporated on the heater. Silicone rubber heaters are used for low & medium temperature applications.