3M 438 Heavy Duty Aluminum Foil Tape

3M 438 Heavy Duty Aluminum Foil Tape

3M™ Heavy Duty Aluminum Foil Tape 438 has a transparent acrylic adhesive to use when a heavier weight foil is required. 438 is flame resistant. Meets U.L. 723, Class “L” low flammability rating (File R 7311). The foil backing provides an excellent reflective surface for both heat and light. Aluminum foil backing and acrylic adhesive system combine to offer long aging both indoors and out. The high coefficient of expansion offered by the aluminum allows expansion and contraction with changes in temperatures, along with thermal conductivity. Performs in a range from -65° to over 300°F (-54° to 149°C). Higher temperatures for shorter periods of time.

438L is the linered version. 

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, and patch tears in skins of aircraft and truck trailers. 

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