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June, 2019
3M™ Aluminum Foil Tape 425
Product Description
3M™ Aluminum Foil Tape 425 combines a 3 mil nominal dead soft
aluminum foil backing with a transparent acrylic adhesive.
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 425 can be certi ed 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, o ers
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 re ection 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 425
Technical Information Note
The following technical information and data should be considered representative or typical only and should not be
used for speci cation purposes.
Typical Physical Properties
Property
Values
Method
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
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
Dwell
Dwell/Cure
Time
Method Time
Units
Property
Values
180° 5.1
Peel N/cm
Adhesion
47
oz/in
ASTM
D3330
Tensile 49
N/cm
Strength
28
lb/in
ASTM
D3759
72
hr
SubstrateBacking Notes
Stainless 2 mil
12 in/min (305 mm/min)
Steel
Aluminum
Foil
Table continued on next page
3M™ Aluminum Foil Tape 425
Typical Performance Characteristics (continued)
Dwell
Dwell/Cure
Time
Method Time
Units
Property
Values
Elongation
6%
at
Break
Temperature
-54 to
Use 149 °C
Range
SubstrateBacking Notes
ASTM
D3759
-65 to
300 °F
Available Sizes
Property
Standard Roll Length
Values
55 m
60 yd
Handling/Application Information
Application Ideas
• Aircraft paint stripping maskant.
• Moisture barrier in “white goods” appliances.
• General purpose heat re ector 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 425
Industry Speci cations
UL 746C (File E 122798)
UL 723 Class “L” low ammability rating (File R 7311)
Can be certi ed 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-3mproducts/~/3M-Aluminum-Foil-Tape-425?
N=5002385+3293241744&rt=rud
Safety Data Sheet (SDS)
https://www.3m.com/3M/en_US/company-us/SDSsearch/results/?
gsaAction=msdsSRA&msdsLocale=en_US&co=ptn&q=425
ISO Statement
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 su cient 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.
3M™ Aluminum Foil Tape 425
Product Selection and Use
Many factors beyond 3M’s control and uniquely within user’s knowledge and control can a ect 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 di erent warranty is speci cally 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
speci cation 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 pro ts or business opportunity), regardless of the legal or equitable
theory asserted, including, but not limited to, warranty, contract, negligence, or strict liability.
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