Silicone Rubber Heater

Silicon rubber heater are extremely thin and flexible and can be constructed in any geometry to fit on almost any type of contours. Their thin design and direct bonding to the application facilitates efficient and rapid heat transfer resulting in faster heating and lower wattage requirement. Silicone Rubber Heaters offer a very high watt density and their versatile design permits higher or lower heat concentration zones to meet distributed wattage requirements. They can be pre-formed to complex shapes and can withstand mechanical shock and vibration. They can also accommodate Thermostats or RTD for precise temperature controls. For ease of connectivity, termination can be provided at any location. Different mounting methods such as pressure sensitive adhesive, field applied adhesive, Velcro etc. are available according to the requirement. Silicone Rubber Heaters are available in two types-

  1. Wire wound
  2. Etched foil

Wire wound elements consist of the resistance wire wound on a fiberglass cord for support and stability. Wire wound is recommended and preferred for all large and small  sized heaters.
Etched foil heaters are made with a thin metal foil (.001”) as the resistance element. The etched foil heater provide exceptional heat transfer compared to wire wound elements, due to its large flat surface area. It can deliver more uniform heat profiles with higher watt densities, providing longer operating heater life.

Note– For more custom design requirements please contact sales@marathonheat.com

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Length  1 to 120 inches
Width  1 to 36 inches
Thickness 0.056″ standard, other thickness available
Watt Density 80 W/in2
Wattage Tolerance +5%, -10%
Maximum Temperature 250 °C
Voltage 12V to 600V AC or DC
Lead wire 12 inch Teflon insulated, other types available
Electrical Rating Wire ±10%  ,-5% (wire wound), ±10%, -10% (etched foil)



  1. Pressure Sensitive Adhesive: An easy mounting method is to peel and stick. PSA is attached directly to one side of the heater. Just peel away the protective liner and attach the heater to the desired tool. It is not recommended for curved surfaces. The heater should be installed within 6 months of manufacture.
  2. Factory Vulcanizing: Another method of installation is to send your tool to the Marathon Heater factory. The tool is placed in a vacuum able and the SRH is vulcanized directly to the tool. This is the strongest bond available.
  3. Field applied adhesive: SRH may also be attached with field applied adhesive; Marathon Heater will supply the required RTV to adhere the heater to the desired surface. We offer a room temperature curing adhesive. Apply a thin film of RTV on the entire bottom of the heater. After positioning the heater on the part, use a roller to remove all air trapped between the heater and the part. The RTV should be allowed to cure for 24 hours.


   Flexible heater lead location options:




  • Condensation Prevention
  • Freeze Protection
  • Food Service
  • Aerospace Industry
  • Heated Platens
  • Medical Services
  • Semiconductor Industry
  • Heating of Pipes
  • Composite Curing

Marathon Heater Drum Heaters are an easy way to heat up drum contents. Various sizes and lengths allow you to heat practically any drum, pail or barrel. Uniform heat prevents scorching or degradation of the contents. The silicone rubber band heater is placed below the level of the fluid. The easy spring lock-up provides movement of the band when content levels fluctuate. The band style drum heater can be used on plastic, alloy or any other material.

  • Springs and Grommet: Each end of the spring is attached to a grommet securing the heater to the tool. Grommets are spaced approximately 2” apart.
  • Velcro: 1" wide Velcro secure the heater. Temperature range 200°C.

Band Style Drum Heater applications include: 1. Freeze protection 2. Viscosity control 3. Speeding up the flow of liquids 4. Maintaining product consistency

  • Easy installation with spring loaded fastener.
  • 3 conductor cord set.
  • Internally grounded.
  • Can be wrapped around any object.
  • Options thermocouples, RTD’s, holes and cut-outs.