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Silicone Rubber Heaters

Silicone Rubber Heaters offer a very high watt density while maintaining flexibility. Good for heating drums, de-icing vending machines, ATMs, aircraft, cars, and maintaining a comfortable temperature in medical equipment, such as CAT scanners.

  • Backer Marathon flexible heaters provide outstanding performance in applications up to 450°F.
  • Design versatility permits special heat profiles,complex shapes and installation on a variety of surfaces.
  • They are not affected by vibration, flexing, or repeated mechanical shock.
  • Silicone rubber has a high dielectric strength, is non-toxic, and flame retardant.
  • Perfect for heating 55 gallon drums.

Design and Construction

The wire wound element consists of high temperature resistance wire wound around a fiberglass core for added support and flexibility while still allowing for expansion and contraction during heat up and cool down. The element is laid out in a computer designed pattern to provide maximum heat transfer and temperature uniformity. After the element is laid out, it is vulcanized between two sheets of silicone rubber until they become one. The silicone rubber sheets also have a layer of fiberglass for added strength and tear resistance. The same vulcanization process is used to attach the power leads and cord sets to the heater windings.

Standard Silicone Rubber Heater Specifications

Voltage 12V to 480V, AC or DC
Length 1" to 120"
Width 1" to 36"
Thickness 0.060" (Other sizes available upon request)
Lead Wire 22 ga. Teflon (other sizes and insulation materials available upon request)
Operating Temperatures -70°F to 450°F
Wattage Tolerance +5% - 10%

UL recognized, File #E202904; RoHS compliant.

Applications

Backer Marathon silicone rubber heaters with wire-wound elements provide an excellent source for uniform heat especially on challenging shapes or applications with flexing or vibration. Operating conditions include vacuum applications, high moisture areas and outdoor applications. Silicone rubber heaters are also used in applications involving oils, solvents, radiation and environmental conditions.

Common Applications

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

Options

Silicone Rubber Heaters are available with many options. There are normally no engineering or set up fees for even the most complex designs. Many of these options can be added to stock heaters for immediate delivery.

Mounting Methods

There are several options for installation or mounting Silicone Rubber Heaters.

Pressure Sensitive Adhesive

As 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. PSA is rated to a continuous temperature of 300°F and a maximum intermittent temperature of 400°F. It is not recommended for curved surfaces. The heater should be installed within 6 months of manufacture.


Factory Vulcanizing 

Another method of installation is to send your tool to the Backer Marathon factory. The tool is placed in a vacuum table and the SRH is vulcanized directly to the tool. This is the strongest bond available.


Field Applied Adhesive

SRH may also be attached with field applied adhesive. Backer Marathon 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.

Wire Wound Flexible Heater Watt Density

Maximum recommended watt density for standard wire wound Silicone Rubber Heaters is 5 watts/in2. Using lower than recommended watt densities will result in increased heater life.


Suggested Maximum Watt Density Per Attachment Method

Watt Density w/in2 Factory Vulcanized PSA
5 240°F - 353°F 350°F - 335°F
10 356°F - 266°F 335°F - 248°F
15 266 - 158°F 248°F - 140°F
20 158 - 68°F 140°F - 32°F
25 40°F - 68°F 32°F - 49°F

 

Stock Parts

1 - 20 of 201 Filter Results

Part No. Watts Volts Length Width Available Qty Price
SRD5-31-A 300 watts 120 volts 31.00 inches 3.000 inches n/a Sign In for Pricing
SRD5-31-N 300 watts 120 volts 31.00 inches 3.000 inches n/a Sign In for Pricing
SRD5-41-A 550 watts 120 volts 31.00 inches 4.000 inches n/a Sign In for Pricing
SRD5-41-N 550 watts 120 volts 31.00 inches 4.000 inches 4 Sign In for Pricing
SRD55-31-110T 1000 watts 120 volts 64.00 inches 3.000 inches n/a Sign In for Pricing
SRD55-31-A 1000 watts 120 volts 64.00 inches 4.000 inches n/a Sign In for Pricing
SRD55-31-N 1000 watts 120 volts 64.00 inches 3.000 inches 7 Sign In for Pricing
SRD55-32-N 1000 watts 240 volts 64.00 inches 3.000 inches 1 Sign In for Pricing
SRD55-41-A 1500 watts 120 volts 64.00 inches 4.000 inches n/a Sign In for Pricing
SRD55-41-N 1500 watts 120 volts 64.00 inches 4.000 inches 7 Sign In for Pricing
SRE020-050A 25 watts 120 volts 5.00 inches 2.000 inches n/a Sign In for Pricing
SRE020-050B 50 watts 120 volts 5.00 inches 2.000 inches n/a Sign In for Pricing
SRE020-060A 60 watts 120 volts 6.00 inches 2.000 inches n/a Sign In for Pricing
SRE020-100A 100 watts 120 volts 10.00 inches 2.000 inches 45 Sign In for Pricing
SRW010-030A 15 watts 120 volts 3.00 inches 1.000 inches 12 Sign In for Pricing
SRW010-030A-10 15 watts 120 volts 3.00 inches 1.000 inches n/a Sign In for Pricing
SRW010-040A 20 watts 120 volts 4.00 inches 1.000 inches 6 Sign In for Pricing
SRW010-040A-10 20 watts 120 volts 4.00 inches 1.000 inches 15 Sign In for Pricing
SRW010-050A 25 watts 120 volts 5.00 inches 1.000 inches 2 Sign In for Pricing
SRW010-050A-10 25 watts 120 volts 5.00 inches 1.000 inches n/a Sign In for Pricing
1 - 20 of 201 Filter Results