Silicone Rubber Enclosure Heaters

Silicone Rubber Enclosure Heaters with Thermostat
Silicone Rubber Enclosure Heaters with Thermostat
Silicone Rubber Electrical Panel Heaters
Silicone Rubber Electrical Panel Heaters


NPH silicone rubber enclosure heaters are designed for easy installation and safe operation. These rectangular-shaped wire wound silicone rubber heaters are vulcanized to an aluminum mounting plate with mounting holes. They provide superior protection for enclosures of all types against condensation, humidity and freezing. It is recommended that the enclosure heaters be used with a thermostat either built-in or mounted remotely to limit the maximum temperature reached and conserve energy.

A wire wound silicone rubber heater with ambient sensing thermostat and aluminum mounting plate are designed to prevent humidity and moisture accumulation in electrical and mechanical enclosures. Enclosure heaters can be supplied with thermostat separate from heater or without mounting plate.

With built-in ambient sensing thermostat, the minimum width is 2". Available lengths are from 5" to 40" at 5 watts/square inch. Aluminum mounting plate is 1/2" wider than heater. Mounting slots are conveniently located. The suggested mounting is vertical with the thermostat at the bottom as shown.Available thermostat setting is 40°F (4°C) 40°/55°F (4°C/13°C). Consult NPH for other settings available. Minimum quantity may apply.

Enclosure Heaters with Ambient Sensing ThermoStat

Silicone Rubber Enclosure Heaters- Wire Wound
Using evenly spaced resistance wires laminated between sheets of silicone, wire wound silicone rubber heater mats are ideal for prototyping or problem solving applications. Manufactured to customer specifications they can be made in a limitless range of shapes and sizes. High flexibility can be obtained using tough, robust silicone materials which are finding ever increasing applications in the industry. Silicone’s wide temperature range, tolerance of -60 to +230 °C and superb electrical properties give it a distinct advantage over other forms of heating.

Silicone Rubber Heaters – Etched Foil
Computer designed chemically etched foil tracks are laminated between thin sheets of silicone to give precise even heating. Suitable for both low and high volume production etched foil heaters have rapid heat up properties with precise temperature control. Heating solutions are available in a limitless range of etch foil heaters to customer specification for multiple industries. Silicone’s wide temperature range, tolerance of -60 to 230°C and superb electrical properties give it a distinct advantage over other forms of heating.

Silicone rubber heaters are extremely versatile and operate efficiently in many environments. Some distinct advantages of silicone rubber heaters are:

  • Moisture resistance
  • Oil and solvent resistance
  • Chemical resistance
  • Outdoor exposure
  • Extremely thin profiles
  • Conform to almost any shape


All silicone rubber heaters are built to order, but rush delivery is available. In most cases, NPH can deliver custom silicone rubber heaters within 48-96 hours. All NPH flexible heaters are available with custom design modification. Custom designs are welcome. Please contact us with your requirements.

Silicone Flexible Heaters - The particular application conditions of aerospace, medical, composite fabrication, optical equipment and computers often require flexible heating elements. NPH offers a wide assortment of in-stock and custom flexible heaters in Kapton® and silicone rubber materials to suit most any of these needs. Silicone Rubber heaters permit composite bonding and curing, as well as repair and fabrication operations. Equal length circuits and a cool tab are provided, while a fiberglass reinforced heater cover means long service life and increased durability. Standard watt density is 5W/in2 (0.8W/cm2). All standard heaters are UL Recognized. Many sizes in stock from 6” x 6” to 20” x 20” (152.4 mm x 152.4 mm to .508 m x .508 m).

  Silicone Rubber and Metal Sheathed Enclosure Heaters


  • Heating of Electronic Components- ATM's and Photocopiers
  • Heating of Aerospace Instrumentation-Satellites and Spacecraft
  • Heating of Electrical and Mechanical Enclosures/Panels
  • Semiconductor Wafer Processing
  • Autoclaves, Incubators and Sterilizers
  • Vacuum Chambers
  • Medical Imaging, Medical Diagnostic Instruments and Analyzers
  • Applications requiring a flexible shape or design

National Plastic Heater supplies silicone rubber heaters for many different applications such as industrial catering, battery warming, environmental control or electronics (particularly telecommunications), laboratory equipment and anti-condensation. The uses for polyimide heaters are infinite as they can suit any application requiring surface heating up to 200°C. Their suitability for arduous conditions has been proven in applications from polar expedition to space exploration. We are the final frontier in polyimide heaters!

THERMAL OR TEMPERATURE CONTROL FOR SILICONE RUBBER ENCLOSURE HEATERS: NPH silicone rubber heaters can be supplied with factory fitted sensors and switches to suit all types of instrumentation. Available from stock are PT100’s, J, K and T type thermocouples, bi-metal thermostats and thermal fuses. We also fit customer specified thermistors and other resistance temperature devices as well as extruded pockets for customers to fit their own sensors. Separate mechanical or digital thermostats can be



How To Order Silicone Rubber Enclosure Heaters
1) Specify length and width
2) Specify watts and Volts
3) Specify type of temperature control required-Thermocouple, RTD, Pre-Set T-stat etc
4) Specify with or without sticky back (PSA-pressure sensitive adhesive)
5) Specify holes, notches, cutouts etc.
6) Provide drawing and or image or sample when required
7) Specify length of leads
8) Specify type of application and its parameters



UL Registered Firm World Wide Shipping CSA US
We Ship Our Kapton Polyimide and Silicone Flexible Heaters To OEM’s & Industry World Wide

Inquiries & Technical Support

Telephone: 905-859-8225 Facsimile: 905-859-4691

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Toll Free: 1-877-674-9744