Polyimide Tape

General Information
K250 is a 1 mil polyimide film coated with a 1.7 mil high-temperature, pressure sensitive silicone adhesive. K250 is primarily used as an electrical insulator and in gold finger protection.
Backing Adhesive
Liner Type
Polyimide Silicone 2.50 mil  
Adhesion to Steel
180° Peel
Adhesive Activation Tensile Strength Elongation Percent
20.00 oz/in Pressure 25.00 lbs/in 50.00%
Min Application
Min Service
Max Short-Term
Max Long-Term
20 °F -100 °F 500 °F  
Adhesive Tape Features
  • High dielectric strength
  • Excellent dimensional stability
  • Superior chemical resistance
  • Puncture, tear and nick resistant
  • No flagging
  • Clean removal
Adhesive Tape Applications
  • Insulating electrical components
  • Protect gold contact fingers on printed circuit boards
Adhesive Tape Markets Served
Adhesive Tape Colors
  • Amber
Comparable products
Backing Adhesive Thickness Adhesion
 Polyimide   Silicone   2.50mil   20.00oz/in 

The physical properties listed are typical values and are not to be considered as specifications. Our suggestions for use are based on tests we believe to be reliable. However, the purchaser must carry out their own tests to determine the suitability of the product for their internal use. Information is given in good faith, but without warranty.

It is essential, as with all pressure-sensitive tapes, that the surface to which the tape is applied be clean, dry and free of grease and oil.

Shelf life from date of manufacture is based on the product being stored at 70°F(21°C) / 50% relative humidity out of direct sunlight.

Specification compliance is dynamic and should only be used as a general guide. Always confirm that the tape you are interested in currently complies with all specification requirements. Please verify that the product number that you select is available in the proper size and color to meet your specification.

Choose the surface energy of the exact surface that the adhesive will contact (e.g. if the part was painted metal, paint would be the surface energy).