3M™ Aluminum Foil Tape 425 • 427

PRODUCT DESCRIPTION:

3M™ Aluminum Foil Tapes 425 and 427 are 5 mil nominal dead soft aluminum foil backing combined with a transparent acrylic adhesive. 3M aluminum foil tape 427 offers an easy-release liner.

PRODUCT CONSTRUCTION:

Backing	Adhesive	Color	Liner	Standard Roll Length
Dead soft aluminum	Acrylic	Shiny Silver	Easy-release paper (3M aluminum foil tape 427)	60 yds. (55 m)

TYPICAL PHYSICAL PROPERTIES:

Note: The following technical information and data should be considered representative or typical only and should not be used for specification purposes.
ASTM Test Method
Adhesion to Steel:		D-3330
3M aluminum foil tape 425	47 oz./in. width (51 N/100 mm)
3M aluminum foil tape 427	50 oz./in. width (55 N/100 mm)
Tensile Strength:	30 lbs./in. width (525 N/100 mm)	D-3759
Backing Thickness:	2.8 mils (0.07 mm)	D-3652
Total Tape Thickness:	4.6 mils (0.12 mm)	D-3652
Liner Thickness:		D-3652
3M aluminum foil tape 427	3.1 mils (0.08 mm)
Elongation at Break:	8%	D-3759
Temperature Use Range:	-65° to 300°F (-54° to 149°C)
Water Vapor:	0.1g H₂O/100 sq. in./24 hrs.
Transmission Rate:	(1.55 g/m²24 hrs.)
Approximate Weight:	0.013 lbs./yd./in. width (4.77 gms/m/24 mm)

FEATURES:

Flame resistant. Meets U.L. 746C (File E 122798) and 723, Class "L" low flammability rating (File R 7311).
Can be certified to meet SAE-AMS-T-23397 and L-T-80B.
Meets requirements of F.A.R. 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, offers 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 reflection 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.

APPLICATION IDEAS:

Aircraft paint stripping maskant.
Moisture barrier in "white goods" appliances.
General purpose heat reflector and heat dissipator.
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:

Store under normal conditions of 60° to 80°F (16° to 27°C) and 40 to 60% R.H. in the original carton.

SHELF LIFE:

To obtain best performance, use this product within 24 months from date of manufacture.

PRODUCT USE:

All statements, technical information and recommendations contained in this document are based upon tests or experience that 3M believes are reliable. However, many factors beyond 3M's control can affect the use and performance of a 3M product in a particular application, including the conditions under which the product is used and the time and environmental conditions in which the product is expected to perform. Since these factors are uniquely within the user's knowledge and control, it is essential that the user evaluate the 3M product to determine whether it is fit for a particular purpose and suitable for the user's method of application.

WARRANTY AND LIMITED REMEDY:

Unless stated otherwise in 3M's product literature, packaging inserts or product packaging for individual products, 3M warrants that each 3M product meets the applicable specifications at the time 3M ships the product. Individual products may have additional or different warranties as stated on product literature, package inserts or product packages. 3M MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY ARISING OUT OF A COURSE OF DEALING, CUSTOM OR USAGE OF TRADE. User is responsible for determining whether the 3M product is fit for a particular purpose and suitable for user's application. If the 3M product is defective within the warranty period, your exclusive remedy and 3M's and seller's sole obligation will be, at 3M's option, to replace the product or refund the purchase price.

LIMITATION OF LIABILITY:

Except where prohibited by law, 3M and seller 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.

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