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Watlow® silicone rubber heaters are rugged, yet thin, lightweight and flexible. Use of these heaters is limited only by the imagination. Heat can be put where it is needed. These silicone heaters improve heat transfer, speed warm ups, and decrease wattage requirements.

Fiberglass-reinforced silicone rubber gives the heater dimensional stability without sacrificing flexibility. Because very little material separates the element from the part, heat transfer is rapid and efficient. The silicone rubber heaters are constructed with a wire-wound element or an etched foil element. The heater construction creates a very thin heater allowing it to fit applications where space is limited.


Material Maximum Operating Temperatures Maximum Watt Densities
°F °C W/in2 W/cm2
Silicone rubber  500 260 80 12.5
  • Wire-wound element thickness — 0.055 in. (1.4 mm)
  • Etched foil element — 0.022 in. (0.56 mm)
  • UR®, cUR®, VDE and CE recognitions are available on many designs up to 428°F (220°C)
  • Operating temperatures up to 500°F (260°C)
  • Watt densities up to 80 W/in² (12.5 W/cm²), dependent upon application temperature


  • Freeze protection and condensation prevention for many types of instrumentation and equipment
  • Medical equipment including blood analyzers and test tube heaters
  • Exhaust gas pre-heating for DPF regeneration
  • Curing of plastic laminates
  • Photo processing equipment
  • Semiconductor processing equipment
  • Computer peripherals such as laser printers

Features & Benefits:

Features Benefits
Designed to the exact shape and size needed
  • Conforms to your component and/or equipment
More than 80 designs available immediately from stock
  • Reduces downtime
Constructed with wire-wound or etched foil elements
  • Delivers a thin, lightweight heater
  • Provides the desired flexibility for many dynamic applications
  • Delivers low mass and easily repeatable distributed watt densities
Moisture and chemical-resistant silicone rubber material
  • Provides longer heater life
Vulcanizing adhesives or fasteners
  • Allows heaters to be easily bonded to the part