439 - Aluminum Foil Tape

3M

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FEATURES

Std Roll Length: 60.00 yards
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

ADVANTAGES

Helps protect parts from water, dust, or chemical damage
Helps protect parts from heat
Will not support combustion
Helps reduce replacement need

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

MARKETS SERVED

Foils
Automotive
Electrical
Electro Plating

COLORS

Silver

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.

PRODUCT CONSTRUCTION

	Type	Mil Thickness

Backing	Aluminum	1.90
Adhesive (unwind)	Acrylic	1.20
Liner Type (inner)	Paper (tan kraft with silicone release; 5.6 mils)
Thickness (total)		3.10

PRIMARY PHYSICAL PROPERTIES

	Unwind Side	Liner Side

Adhesion-to-Steel - 180° Peel	41.00 oz/in
Adhesive Activation	Pressure
Tensile Strength	18.00 lbs/in
Elongation Percent	3.00%
Testing Info: Initial peel adheison to stainless steel: ASTM D-3330; tensile strength and elongation at break: ASTM D-3759; Backing and tape thickness: ASTM D-3652; Water vapor transmission rate: ASTM D-3833

SECONDARY PHYSICAL PROPERTIES

Water Resistant	Yes
UV Resistant	Yes
Chemical Resistant	Yes

THERMAL / ELECTRICAL PROPERTIES

Minimum Application Temperature	32°F
Minimum Service Temperature	-65°F
Maximum Short-Term Temperature	300°F
Flame Resistant	Yes

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.