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Technical content

June, 2019 3M™ Aluminum Foil Tape 427 Product Description 3M™ Aluminum Foil Tape 427 combines a 3 mil nominal dead soft aluminum foil backing with a transparent acrylic adhesive. 3M aluminum foil tape 427 oers an easy-release liner. Product Features

  • Flame resistant. Meets U.L. 746C (File E 122798) and 723, Class “L” low ammability rating (File R 7311).
  • 3M aluminum foil tape 427 can be certied to meet L-T-80C.
  • Meets requirements of FAR 25.853(a).
  • The very low moisture vapor transmission rate makes these tapes a good sealant.
  • The acrylic adhesive, combined with the durable aluminum backing, oers ideal properties for long serviceable life in and outdoors.
  • Good candidate as a maskant in electroplating of aluminum because it will not contaminate the bath.
  • Aluminum backing provides excellent reection of both heat and light.
  • Best results obtained when applied to a clean, dry surface above 32°F (0°C). IMPORTANT: These tapes are not intended for medical usage. Neither 3M nor the Food and Drug Administration have evaluated or reviewed this tape for medical application. 3M does not recommend or endorse the usage of the aluminum tape for medical application. User assumes all risk and liability whatsoever in connection with usage of product in a medical application.

3M™ Aluminum Foil Tape 427 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 Backing Color Shiny silver Total Tape Thickness 0.12 mm 4.6 mil ASTM D3652 Backing Thickness 0.07 mm 2.8 mil ASTM D3652 Backing Dead soft aluminum Adhesive Acrylic Liner Easy-release paper Liner Thickness 0.08 mm 3.1 mil ASTM D3652 Approximate Weight 5.54 g/m/24 mm 0.012 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

5.5 N/cm 50 oz/in ASTM

12 in/min (300 mm/min)

3M™ Aluminum Foil Tape 427 Typical Performance Characteristics (continued) Property Values Method Dwell/Cure Time Substrate Notes Tensile Strength

49 N/cm 28 lb/in ASTM

6 % ASTM D3759 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

  • Aircraft paint stripping maskant.
  • Moisture barrier in “white goods” appliances.
  • General purpose heat reector and heat dissipater.
  • Mechanically hold wires and cooling coils in “white goods” appliances.
  • Repair tears on truck trailers and aircraft.
  • Splicing of thin gauge foils.
  • General purpose holding, patching, sealing applications – indoors and out. 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.

3M™ Aluminum Foil Tape 427 Industry Specications UL 746C (File E 122798) UL 723 Class “L” low ammability rating (File R 7311) Can be certied to meet L-T-80C FAR 25.853(a) Trademarks 3M is a trademark of 3M Company. References Property Values 3m.com Product Page http://www.3m.com/3M/en_US/company-us/all-3m- products/~/3M-Aluminum-Foil-Tape-427? N=5002385+3293242556&rt=rud Safety Data Sheet (SDS) https://www.3m.com/3M/en_US/company-us/SDS- search/results/? gsaAction=msdsSRA&msdsLocale=en_US&co=ptn&q=427 This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9001 standards. The technical information, recommendations and other statements contained in this document are based upon tests or experience that 3M believes are reliable, but the accuracy or completeness of such information is not guaranteed.

3M™ Aluminum Foil Tape 427 Warranty, Limited Remedy, and Disclaimer Limitation of Liability 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 Many factors beyond 3M’s control and uniquely with user’s knowledge and control can aect the use and performance of a 3M product in a particular application. User is solely responsible for evaluating the 3M product and determining whether it is t for a particular purpose and suitable for user’s method of application. Unless an additional warranty is specically stated on the applicable 3M product packaging or product literature, 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 OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY OR CONDITION ARISING OUT OF A COURSE OF DEALING, CUSTOM OR USAGE OF TRADE. If the 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. Except where prohibited by law, 3M will not be liable for any loss or damage arising from the 3M product, whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted, including warranty, contract, negligence or strict liability.