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3M 439
Aluminum Foil Tape

General Information
439 is a 3.1 mil, aluminum foil tape. It is primarily used for many permanent sealing, holding, splicing or masking applications requiring the protection offered by a foil backing.
Backing Adhesive
(unwind)
Thickness
(total)
Liner Type
(outer)
Aluminum Acrylic 3.10 mil  

Adhesion to Steel
180° Peel
Adhesive Activation Tensile Strength Elongation Percent
41.00 oz/in Pressure 18.00 lbs/in 3.00%

Min Application
Temp
Min Service
Temp
Max Short-Term
Temp
Max Long-Term
Temp
32 °F -65 °F 300 °F  
Adhesive Tape Features
  • Aluminum foil backing is protective
  • Heat reflective
  • Flame resistant
  • Acrylic adhesive
  • Water vapor transmission rate: 0.1g H2O/100 sq.in./24 hrs. (1.55 g/m2/.24 hrs.)
  • Liner version is tan kraft paper with silicone release
  • Helps protect parts from water, dust, or chemical damage
  • Helps protect parts from heat
  • Will not support combustion
  • Helps reduce replacement need
Adhesive Tape Applications
  • Seal and patch tears in truck trailers, as well as other outdoor equipment
  • Reflect heat away from sensitive areas
  • Thermal heat conduction
  • general purpose holding, patching, sealing applications indoors or out
  • Splicing of thin gauge foils
  • Good maskant in electroplating of aluminum because it will not contaminate the bath
  • Decorative
Adhesive Tape Markets Served
Adhesive Tape Colors
  • Silver

Comparable products
Backing Adhesive Thickness Adhesion
 Aluminum   Acrylic   3.10mil   41.00oz/in 

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Pricing Popup Link: <Not Available>

Recommended Rank: 25

Backing Adhesive Thickness Adhesion
 Aluminum   Acrylic   3.25mil   40.00oz/in 

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Pricing Popup Link: <Not Available>

Recommended Rank: 25

Converting Options
Converting Services
Budnick Converting offers a number of services to take the product you need and make it perfect for your application.  With converting methods ranging from precision slitting or die-cutting to printing and coating, Budnick has the capabilities to create anything you can dream up. 
Services
Precision Cutting

Die-Cutting

Slitting

Printing

Adhesive Coating

Finishing and Spooling

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.