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Technical content

May, 2017 3M™ Heavy Duty Aluminum Foil Tape 438 Product Description 3M™ Heavy Duty Aluminum Foil Tape 438 has a transparent acrylic adhesive to use when a heavier weight foil is required. Product Features

  • Flame resistant. Meets U.L. 723, Class “L” low ammability rating (File R 7311).
  • Meets requirements of FAR 25.853(a).
  • Foil backing provides an excellent reective surface for both heat and light.
  • Aluminum foil backing and acrylic adhesive system combine to oer long aging both indoors and out.
  • The high coecient of expansion oered 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.

3M™ Heavy Duty Aluminum Foil Tape 438 Technical Information Note The following technical information and data should be considered representative or typical only and should not be used for specication purposes. Typical Physical Properties Property Values Method Color Shiny Silver Total Tape Thickness 0.18 mm 7.2 mil ASTM D3652 Backing Thickness 0.13 mm 5 mil ASTM D3652 Backing Aluminum Foil Adhesive Acrylic Approximate Weight 0.0109 g/m/24 mm 0.0217 lb/yd/in Water Vapor Transmission 0.77 g/m²/24 hr 0.05 g/100 in²/24 hr ASTM D3833 Typical Performance Characteristics Table continued on next page Property Values Method Dwell/Cure Time Substrate Notes 180° Peel Adhesion

4.7 N/cm 43 oz/in ASTM

12 in/min (300 mm/min) Tensile Strength

103 N/cm 59 lb/in ASTM

10 % ASTM D3759

3M™ Heavy Duty Aluminum Foil Tape 438 Typical Performance Characteristics (continued) Property Values Method Dwell/Cure Time Substrate Notes Temperature Use Range -54 to 149 -65 to 300 °F Available Sizes Property Values Standard Roll Length 55 m 60 yd Handling/Application Information Application Ideas

  • Barrier, protector and thermal conductor in appliance (electronics) industry.
  • Use when customer specication 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. Storage and Shelf Life Store under normal conditions of 60° to 80°F (16° to 27°C) and 40 to 60% R.H. in the original carton. To obtain best performance, use this product within 24 months from date of manufacture. Industry Specications UL 723, Class “L” low ammability rating (File R 7311) FAR 25.853(a) References Safety Data Sheet (SDS) https://www.3m.com/3M/en_US/company-us/SDS-search/results/? gsaAction=msdsSRA&msdsLocale=en_US&co=ptn&q=438

3M™ Heavy Duty Aluminum Foil Tape 438 ISO Statement Information This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9001 standards. Technical Information: The technical information, guidance, and other statements contained in this document or otherwise provided by 3M are based upon records, tests, or experience that 3M believes to be reliable, but the accuracy, completeness, and representative nature of such information is not guaranteed. Such information is intended for people with knowledge and technical skills sucient to assess and apply their own informed judgment to the information. No license under any 3M or third party intellectual property rights is granted or implied with this information. Product Selection and Use: Many factors beyond 3M’s control and uniquely within user’s knowledge and control can aect the use and performance of a 3M product in a particular application. As a result, customer is solely responsible for evaluating the product and determining whether it is appropriate and suitable for customer’s application, including conducting a workplace hazard assessment and reviewing all applicable regulations and standards (e.g., OSHA, ANSI, etc.). Failure to properly evaluate, select, and use a 3M product and appropriate safety products, or to meet all applicable safety regulations, may result in injury, sickness, death, and/or harm to property. Warranty, Limited Remedy, and Disclaimer: Unless a dierent warranty is specically stated on the applicable 3M product packaging or product literature (in which case such warranty governs), 3M warrants that each 3M product meets the applicable 3M product specication at the time 3M ships the product. 3M MAKES NO OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR ARISING OUT OF A COURSE OF DEALING, CUSTOM, OR USAGE OF TRADE. If a 3M product does not conform to this warranty, then the sole and exclusive remedy is, at 3M’s option, replacement of the 3M product or refund of the purchase price. Limitation of Liability: Except for the limited remedy stated above, and except to the extent prohibited by law, 3M will not be liable for any loss or damage arising from or related to the 3M product, whether direct, indirect, special, incidental, or consequential (including, but not limited to, lost prots or business opportunity), regardless of the legal or equitable theory asserted, including, but not limited to, warranty, contract, negligence, or strict liability.

3M™ Heavy Duty Aluminum Foil Tape 438 3M United States 3M Center St. Paul, MN 55144-1000 800-362-3550 www.3M.com Please recycle. © 3M 2021. All Rights Reserved. The brands listed above are trademarks of 3M