3
Aluminum Foil Tape
425
Product Description
Product Construction
Typical Physical
Properties
Features
Technical Data
•
427
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.
Backing
Dead soft
aluminum
• Flame resistant. Meets U.L. 746C (File E 122798) and 723, Class “L” low
• 3M aluminum foil tape 425 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
• Good candidate as a maskant in electroplating of aluminum because it will not
• 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.
Note: The following technical information and data should be considered representative
Adhesion to Steel:
Tensile Strength:
Backing Thickness:
Total Tape Thickness:
Liner Thickness:
Elongation at Break:
Temperature Use Range:
Water Vapor
Approximate Weight:
flammability rating (File R 7311).
properties for long serviceable life in and outdoors.
contaminate the bath.
3M aluminum foil tape 425
3M aluminum foil tape 427
3M aluminum foil tape 427
Transmission Rate:
or typical only and should not be used for specification purposes.
Adhesive
Acrylic
Color
Shiny silver
47 oz./in. width (51 N/100 mm)
50 oz./in. width (55 N/100 mm)
30 lbs./in. width (525 N/100 mm)
2.8 mils (0.07 mm)
4.6 mils (0.12 mm)
3.1 mils (0.08 mm)
8%
-65° to 300°F (-54° to 149°C)
0.1g H
(1.55 g/m
0.013 lbs./yd./in. width (4.77 gms/m/24 mm)
2
O/100 sq. in./24 hrs.
2
/24 hrs.)
Liner
Easy-release paper
(3M aluminum foil tape 427)
Standard Roll Length
60 yds. (55 m)
ASTM Test Method
April, 2008
D-3330
D-3759
D-3652
D-3652
D-3652
D-3759
D-3833
