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Silicone Rubber Enclosure Heaters 

Designed for freeze and condensation protection, Watlow's enclosure heaters are rugged, reliable and safe to operate. These rectangular-shaped, wire-wound silicone rubber enclosure heaters can be ordered by themselves with adhesive or vulcanized to an aluminum mounting plate. A thermostat can be attached to the heater or mounted separately. Pictured are enclosure heater units with thermostat on heater in foreground and heater with remote thermostat in background.


Material Maximum Operating Temperatures Maximum Watt Densities
°F °C W/in2 W/cm2
Silicone rubber  500 260 5 0.8
  • Temperature to 150°F (66°C)
  • Watt density rating of 5 W/in² (0.8 W/cm²)


  • Freeze or condensation prevention in housings containing electronic equipment including:
  • Traffic signal boxes
  • Automated teller machines
  • Temperature control panels
  • Gas or liquid control valve housings

Features & Benefits:

Features Benefits
Pressure sensitive adhesive mounting to aluminum plate or customer cementing
  • Reduces installation time
  • Creates easy installation
Several standard thermostat set points
  • Ensures protection against freezing with minimal energy consumption
Variety of installation options
  • Provides the customer the option to utilize cement installation ensuring permanent attachment of heater
  • Saves assembly time choosing the pressure sensitive adhesive installation option
  • Facilitates assembly and disassembly with factory installed aluminum plate mount
Remote thermostat option
  • Provides optimal choice of heater location versus temperature control location
Lead options
  • Allows for a variety of applications
  • Allows for different lead lengths for a variety of wiring requirements
Factory pre-wired heater and thermostat
  • Ensures safety and reliability due to no exposed electrical connections
No exposed electrical connections
  • Creates a safe and reliable operation

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Related Literature

Specification Sheets (2)

Brochures (2)

Quality Certificates (2)

Catalogs (4)



Silicone Rubber Enclosure Heaters
Silicone Rubber Enclosure Heaters