438 - Heavy Duty Aluminum Foil Tape

3M

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ADHESIVE TAPE FEATURES

Std Roll Length: 60.00 yards
5-mil aluminum foil backing is heavy protection, heavier than many foil backings
Heat reflective
Non-flammable meets U.L. 723 Class "l"
Acrylic adhesive is long aging
Water Vapor = 0.1g H2O/100 sq. in./24 hrs.
Transmission Rate: (1.55 g/m2/24 hrs.)
Weight = 0.0217 lbs./yd./in./width (0.0109 kg/m/24 mm)

ADHESIVE TAPE ADVANTAGES

Helps protect parts from water, dust and chemical damage
Helps protect parts from heat
Will not aid combustion
Helps reduce replacement cost

ADHESIVE TAPE APPLICATIONS

Barrier, protector and thermal conductor in appliance (electronics) industry
Use when customer specification calls for a 5-mil (0.13 mm) foil as a barrier for vinyl coated wires in many applications in appliance industry
Patch tears in skins of aircraft and truck trailers

ADHESIVE TAPE MARKETS SERVED

Appliance
Electronics
Industrial
Aerospace
Automotive

ADHESIVE TAPE COLORS

Silver

GENERAL INFORMATION

438 is a 7.2 mil, heavy duty aluminum foil tape. It is primarily used as a barrier, protector and thermal conductor in appliance (electronics) industry. It is also used to patch tears in skins of aircraft and truck trailers.

PRODUCT CONSTRUCTION

	Type	Mil Thickness

Backing	Aluminum	5.00
Adhesive (unwind)	Acrylic	2.20
Thickness (total)		7.20

PRIMARY PHYSICAL PROPERTIES

	Unwind Side	Liner Side

Adhesion-to-Steel - 180° Peel	43.00 oz/in
Adhesive Activation	Pressure
Tensile Strength	59.00 lbs/in
Elongation Percent	10.00%
Testing Info: Initial peel adhesion to stainless steel: ASTM D-3330; tensile strength and elongation at break: ASTM D-3759; Backing and tape thickness: ASTM D-3652

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

Adhesive Tape and Foam Converting Services

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.