High-Temperature Electrical Insulation Tape Solutions
To ensure a consistently reliable energy supply, as well as effective transformation, transmission and component protection in modern energy grids exposed to extreme temperatures and currents, the electromechanical industry requires robust tapes with high thermal ratings that can withstand design and application stresses. Electromechanical engineers need tailored solutions that combine various backings, including PTFE, PI or glass cloth, with high-performance adhesives that contribute to a tape’s thermal performance alongside other critical properties, including electrical, mechanical and chemical considerations. Our UL-certified tapes range from high-tensile-strength glass cloth tapes, ideal for holding/banding layers in the winding of a dry-type transformer, to conformable polyimide tapes, which are ideal for wrapping end-winding phase insulation in a motor or generator, resulting in fewer defects, longer service life and greater resistance.
Nomex® Aramid Paper Tapes
Nomex aramid paper tapes with acrylic (Class F, 155°C) or rubber (Class B, 130°C) adhesives are an ideal choice to ensure puncture resistance and absorption, and are excellent for use in resin-filled transformers or motors.
Fluoropolymer tapes
Fluoropolymer tapes (PTFE and FEP) with silicone adhesive offer outstanding temperature resistance (Class N, 200°C) and dielectric strength, making them ideal for insulating end-windings in high-temperature motors and generators. The fluoropolymer backings are available in a wide range of thicknesses and conformability options.
Polyimide tapes
Polyimide (PI) tapes with silicone adhesive offer high thermal resistance (Class H, 180°C) and conformability, ideal for insulation of end-windings in high-temperature motors and generators. PI tapes available feature DuPont Kapton® materials and value grades of PI in a full range of thicknesses.
Polyethylene naphthalate tapes
Polyethylene-Naphthalate (PEN-Teonex®) Tapes with silicone adhesive offer equivalent thermal resistance to a PI tape (Class H, 180°C) and improved chemical resistance. Commonly used as insulation for ignition coils, our PEN tapes are available in unique colours including red and blue.
Glass cloth tapes
Glass cloth tapes with silicone adhesive are excellent insulation materials for high-temperature applications including thermal Class N 200°C. Higher-temperature coil-winding applications demand the use of a high-tensile, high-temperature glass cloth tape for banding layers of insulation together.
Nomex, Kapton and Teonex are registered and owned by Dupont.
High-Temperature Electrical Insulation Materials Selection Guide
- Thermal Insulation Class F (155 °C)
- Thermal Insulation Class H (180°C)
- Thermal Insulation Class N (200 °C)
| Substrate | Adhesive | Thickness 0.003 to 0.010 in (0.075 to 0.250 mm) | UL File | Product Features | Common Applications |
| Nomex Aramid Paper Tapes | Acrylic | X.50 | OANZ2.E178430 | Puncture-resistant and high absorption for resin-filled systems | Motors and dry transformers |
| X.80 | – | Good thermal, puncture and chemical resistance | |||
| X.130 | – | ||||
*BOLD = UL Recognised Component
| Substrate | Adhesive | Thickness 0.0005 to 0.002 in (0.013 to 0.050 mm) | Thickness 0.003 to 0.010 in (0.075 to 0.250 mm) | UL File | Product Features | Common Applications |
| Fluoropolymer Tape PTFE | Silicone | 2255 | – | OANZ2.E66639 | High-strength, high-dielectric tape | High-frequency motors, wiring harnesses |
| – | 2045 | OANZ2.E66639 | High-elongation tape for conformable wire wrapping | |||
| Fluoropolymer Tape FEP | C Tape | – | – | For use in low-temperature applications (-196°C) | ||
| 2355 | – | – | Exceptional clarity with a clean-removal adhesive | |||
| Polyimide Tapes | Silicone | 2345-2 | 2345-5 | OANZ2.E66639 | Thick polyimide tape, high dielectric strength | High-voltage motors |
| 2345-1D, 2345-2D (also listed as H.20, H.50) | - | OANZ2.E178430 | Featuring DuPont Kapton film | DuPont Kapton-qualified traction motors, transformers | ||
| 2345-1 | - | OANZ2.E66639 | Premium electrical-grade polyimide with high adhesion | High-temperature motors, wiring harnesses | ||
| K104 | - | - | Ultra-thin polyimide tape | Speaker insulation | ||
| PEN Tapes | Silicone | K.30, K.50 | - | OANZ2.E178430 | Featuring chemically resistant DuPont Teonex | Ignition coil insulation |
| Glass Cloth Tapes | Silicone | - | G561, 2915-7Q | OANZ2.E66639 | Glass cloth tape with thermoset silicone, Mil-i-19166C | High-temperature motors, wiring harnesses |
| 2915-10Q | - | Glass cloth tape with higher-adhesion silicone, Mil-i-19166C | ||||
| GL.99 | OANZ2.E178430 | Economical glass cloth tape | High-temperature dry-type transformers | |||
| 2905 | OANZ2.E66639 | Silicone-coated on two sides | High-temperature motors, wiring harnesses |
*BOLD = UL Recognised Component
| Substrate | Adhesive | Thickness 0.003 to 0.010 in (0.075 to 0.250 mm) | UL File | Product Features | Common Application |
| Glass Cloth Tape | Silicone | G565 | OANZ2.E51201 | Superior thermal capability, tensile strength and abrasion-resistant tape | High-temperature, dry-type transformers or motors |
