Kapton Gaskets

Kapton® Polyimide Film (Gaskets, Seals, Insulators)

Custom Gasket Mfg. is a recognized leading manufacturer of Kapton® gaskets, seals, and insulators. Our company's reputation for excellence has been built on our ability to provide our valued customers with the most effective designing, engineering and manufacturing solutions to meet their most demanding applications. Our main objective is to continuously exceed our customer's expectations by providing them with high performance gaskets and sealing products, competitive pricing, on-time delivery and exceptional customer service. Custom Gasket Mfg. maintains a modern manufacturing facility along with knowledgeable, technically-oriented professionals enabling us to consistently meet all of your blueprint specifications and tolerance requirements.

Kapton Gaskets, Seals, Insulators
Custom Gasket Mfg. has over forty years experience specializing in the manufacturing of precision Kapton® gaskets, seals, and insulators for a wide range of industries and applications. We utilize several different methods of manufacturing custom Kapton® components depending upon our customer's requirement including: die cutting, water jet cutting, and laser cutting. Custom Gasket Mfg. also offers many secondary applications such as punching, scoring, creasing, folding, metalizing, laminating, and pressure sensitive adhesive coating.

Kapton® (by DuPont™) is a polyimide film which offers a unique combination of electrical, thermal, chemical and mechanical properties over a wide temperature range. It can function at 428°F to 464°F for continuous service, and intermittent at 752°F. Kapton® can operate at temperatures as low as -452°F. It excels as an insulator and exhibits high-temperature resistance. Kapton® does not melt or burn as it has the highest UL-94 flammability rating: V-0. Kapton® Film is available in thicknesses from 0.0003" up to 0.005". Custom Gasket Mfg. takes pride in its ability to consistently produce precision Kapton® components guaranteed to meet your specifications and function perfectly within your application.

Available types of Kapton® Polyimide Film




KAPTON® standard types


Polyimide General Use (Basic)

Insulation for wires, conductors, cables, motor windings, solenoids, transformers and capacitors


Polyimide Film / FEP Coating

Insulation of high temperature wires, cables and ribbon cables


Polyimide Film, Dimensionally Stable

Close Tolerance

KAPTON®special types


Corona Resistant Polyimide Film

Electrical Systems, Power Inverters



Conductors and Cables Insulation in Electrical Systems


High Thermal Conductivity Polyimide

Motor Winding Insulation


Black Polyimide / High Thermal Conductivity

Loudspeaker Coils, Electrical Insulating Pads


KAPTON® MT  / FEP coating

Heater elements


Black Polyimide Film

Satellite Blankets, Radiant Heat Absorber


Electrically Conductive, Antistatic

Satellites, Microwave and RF Electronics


Thermoplastic Polyimide Film (Heat-Sealable)

High temperature applications, such as insulations in aerospace, aviation, space travel, heater foils, and laminates with glass/ceramics


Polyimide Base Film HN with KJ-Coating

High temperature applications, such as insulations in aerospace, aviation, space travel, magnetics, oscillators, and laminates with glass/ceramics

Kapton® Polyimide Film Industry Applications

Kapton® Polyimide Film possesses a unique combination of electrical, thermal, mechanical, physical and chemical properties that make it ideal for a variety of industries including:

  • Consumer Electronics
  • Electrical Insulation
  • Circuit Board Insulation
  • Flexible Circuits
  • Transformer
  • Generator
  • Automotive Diaphragms
  • Automotive Sensors
  • Speaker Coils
  • Heat Sink Pads
  • Fiber Optics Cable
  • High Temperature Powder Coating
  • Semiconductor Manufacturing
  • Motor Windings
  • Rotor
  • Electrical Devices
  • Dielectric Gaskets
  • Thermal barrier
  • Etching
  • Insulation Pads (Heat Sinks)
  • Transformer and Capacitor Insulation
  • Magnet Wire insulation
  • Formed Coil Insulation
  • Wind Energy


Kapton® is a registered trademark of DuPont™

Please visit our gasket materials page for more information on our extensive selection of materials.

For more information on custom kapton® products or to speak with one of our knowledgeable professionals, please feel free to Contact Us or complete our online Request For Quote form.

Call 800-985-6750 or email your inquiry to sales@customgasketmfg.com