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904-1
Polyester Film Electrical Insulating Tape



General Information
904-1 is a 2.5 mil, polyester film coated with silicone adhesive. The silicone will release cleanly. It is transparent for applications where optical clarity is an issue. 904-1 is used primarly in masking metal parts during bonding or mild acid etching as electrical insulation, as splicing tape for silicone liners and paper, and in the epoxy bonding of aircraft parts.
Backing Adhesive
(unwind)
Thickness
(total)
Liner Type
(outer)
PET - Polyester Silicone 2.50 mil  
Adhesion to Steel
180° Peel
Adhesive Activation Tensile Strength Elongation Percent
30.00 oz/in Pressure 20.00 lbs/in 100.00%
Min Application
Temp
Min Service
Temp
Max Short-Term
Temp
Max Long-Term
Temp
40 °F 0 °F 310 °F  
Adhesive Tape Features
  • Releases cleanly
Adhesive Tape Applications
  • Transparent for applications where optical clarity is an issue
  • Used primarly in masking metal parts during bonding or mild acid etching as electrical insulation
  • Splicing tape for silicone liners and paper
  • Epoxy bonding of aircraft parts
Adhesive Tape Markets Served
Adhesive Tape Colors
Comparable products
Backing Adhesive Thickness Adhesion
 PET - Polyester   Silicone   2.50mil   30.00oz/in 
Backing Adhesive Thickness Adhesion
 PET - Polyester   Rubber   2.20mil   19.00oz/in 
Backing Adhesive Thickness Adhesion
 PET - Polyester   Silicone   2.50mil   30.00oz/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).