Tempco Custom Heater Manufacturing

Tempco Silicone Rubber Heaters

What You Need to Know!

Silicone Rubber Heaters are a type of flexible heater. They are typically made from two or more layers of fiberglass-reinforced silicone rubber. The texture of the silicone rubber is either smooth or rough, each with their own beneficial qualities. The wire wound or etched foil heating element is insulated between the layers of silicone rubber. These types of heaters perform well in a wide variety of low watt density applications such as:

  • Freeze-protection
  • Condensation evaporation
  • Food processing and preparation
  • Battery warming
  • Part repair
  • Curing and bonding
  • And much more…

Silicone rubber heaters are ideal for challenging applications because of their versatility. They are well-suited for applications where space is limited. Depending on the texture, the material can withstand many adverse conditions. These heaters can be made with various clamping and mounting options for easy and quick installation. Tempco offers a variety of lead wire types and temperature control options for silicone rubber heaters as well.

As with most electric heaters and heating elements, silicone rubber heaters have benefits and limitations. Here is what you need to know when considering a silicone rubber heater for your application.


  • Highly customizable: Silicone rubber heaters can be made to customer specifications. They can be designed in many shapes and sizes with holes and cutouts to accommodate irregular shapes. Tempco offers a variety of lead exit locations with wide selection of electrical terminations. Available mounting methods include clamping options, mechanical fasteners and permanent options such as Pressure Sensitive Adhesive (PSA) and vulcanizing.
  • Vulcanization to Parts: Silicone rubber heaters can be vulcanized to hard surfaces such as bare or anodized aluminum, stainless steel and marble. Factory vulcanizing the heaters can simplify the installation process and provide excellent heat transfer. Parts for this process can be made in house at Tempco or provided to us for this process.
  • High Performance in Adverse Conditions: Tempco's silicone rubber heaters can operate efficiently under many adverse conditions such as outdoor environments and ambient temperatures, exposure to contaminants and moisture, compression set or vacuums. Depending on your application, the texture of the heater material may be important. The standard material, rough silicone, is a more durable material. Optional smooth silicone is more flexible and stain resistant and is sometimes recommended for applications requiring permanent mounting solutions.
  • Formable Design: Standard silicone rubber heaters are made flat. However, Tempco can form them to a diameter or to a unique shape to better conform to your application.
    Built-in Temperature Control: These types of heaters can be made with various temperature sensor and control devices. Thermostats, thermal fuses, thermocouples, thermistors, and RTD’s can be manufactured directly into the heater.
  • Third Party Certifications: Depending on heater specifications, silicone rubber heaters may be eligible for agency approvals such as UL, CSA, CE, and/or UKCA certification to comply with safety and performance requirements.


  • Low Watt Density Applications Only: Silicone rubber heaters function best in applications where the watt density is between 0.5 Watts per square inch and 5 Watts per square inch. High watt densities are not recommended and because they may shorten the life expectancy of the heater. For applications requiring higher watt densities, products like micaband heaters or mica insulated strip heaters may be a better option.
  • Water Resistant, not Waterproof: While this type of heater can withstand humid or moist environments, it is not completely water proof and should never be submerged or exposed directly to liquids and contaminates. Tempco’s tubular heating elements that are used in a several of our process immersion heaters may be a better option where immersion in liquid is occurring.

cone-shaped silicone rubber heater for food warming

Cone-shaped flexible heater for food warming



flexible heater vulcanized to custom-made part

Flexible heater vulcanized to custom-made part



If you need a flexible, shape-conforming heater, silicone rubber heaters may be the best option for your application. Consult Tempco with your heating requirements and we can design and manufacture a custom heating solution for your application.

Helpful Links:

Specifications & Tolerances

Heater Wattage & Watt Density Information

Neal K.

Design Engineer

April 12, 2024


Get Connected with Tempco!

Subscribe below to receive emails with the latest product information and company updates.

First Name

Last Name

Company Name

Email    [email protected]

Yes! I would like to receive emails that keep me connected with Tempco.

We value you and your information, so we won't share it with anyone and you can unsubscribe at any time.








Please wait while we gather your results.

Tempco logo
Tempco Electric Heater Corporation

607 N. Central Ave. | Wood Dale, IL 60191-1452 USA
Phone: 630.350.2252 | Toll Free: 888.268.6396
Fax: 630.350.0232 | Email: [email protected]

We have Branch Offices located across the United States.



Tempco on LinkedIn       Tempco on Facebook       Tempco on Instagram       Tempco on Twitter       Tempco on YouTube

© 2023-2024 Tempco Electric Heater Corporation. All Rights Reserved.