3M Glass Cloth Electrical Tape 79
with Acrylic Pressure-Sensitive Adhesive
Data Sheet
Description
™
September 2016
3M
™
Glass Cloth Electrical Tape 79 is a 7-mil woven insulating glass cloth tape with an
acrylic pressure-sensitive adhesive. This tape is used to electrically insulate and
provide mechanical protection at temperatures to 311°F/155°C. This tape provides
insulation and solvent-resistant protection for use as coil cover, anchor, banding and
core, layer and crossover insulation. It is edge-tear resistant, conformable and
printable. It also features an excellent absorption of resin and varnishes.
Agency Approvals,
Self Certifications,
MIL Specs
UL Recognized Component listing for 311°F/155°C, Guide OANZ2, File E17385
RoHS Compliant 2002/95/EC” means that the product or part (“Product”) does not contain any of the substances in excess of
the maximum concentration values in EU Directive 2002/95/EC, as amended by Commission Decision 2002/618/EC, unless
the substance is in an application that is exempt under RoHS. This information represents 3M’s knowledge and belief, which
may be based in whole or in part on information provided by third party suppliers to 3M.
Applications
•
•
Used in a variety of coil/transformer and motor applications, including an outer
wrap for bobbin wound coils, banding arbor wound coils, lead pad hold down, end
turn and lead anchor and connection
Used for banding and strapping applications up to 155°C
Typical Properties
Physical
Data is not for specifications. Values are typical and should not be considered minimum or
maximum. Properties measured at room temperature
73°F/~23°C unless otherwise stated.
Property (Test Method)
(ASTM
D1000
unless noted)
Color
Adhesive
Backing Thickness
Total Thickness
Elongation (% at break)
Operating Temperature
Adhesion to Steel
UL 510 Flame Retardant
White
Acrylic
5.0 mils (0,127 mm)
7.0 mils (0,177 mm)
5%
155°C
30 oz/in (3,3 N/10 mm)
No
Typical Value
US units (metric)
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3M
™
Glass Cloth Electrical Tape 79
Typical Properties
Electrical
Property (Test Method)
(ASTM
D1000
unless noted)
Dielectric Breakdown
Breaking Strength
Insulation Resistance
CTI Material Group
Electrolytic Corrosion Factor
Typical Value
US units (metric)
3000 V
150 lbs/in (262 N/10 mm)
2.7 x 10
2
megohms
1
0.9
Specifications
3M
™
Glass Cloth Electrical Tape 79 is a glass cloth electrical tape with acrylic pressure-
sensitive adhesive. The tape shall be white and 7 mils (0,178 mm) thick. The tape shall
be coated on one side with pressure-sensitive adhesive, which shall not require heat,
moisture or other preparation prior to or subsequent to application. The adhesive
coating shall be smooth and uniform and be free of lumps and bare spots. There shall
be no separator between adjacent layers of the roll. The tape shall perform at a
temperature of -40°F/-40°C to 311°F/155°C without loss of physical or electrical
properties.
This product has a 5-year shelf life from date of manufacture when stored in a humidity
controlled storage (50°F/10°C to 80°F/27°C and <75% relative humidity).
Electrical Tape 79 is available in standard and custom lengths and widths. Standard
length is 60 yards.
Please contact your local distributor; available from 3M.com/electrical [Where to Buy] or
call 1-800-676-8381.
Shelf Life &
Storage
Availability
Important Notice
All statements, technical information, and recommendations related to 3M’s products are based on information believed
to be reliable, but the accuracy or completeness is not guaranteed. Before using this product, you must evaluate it and
determine if it is suitable for your intended application. You assume all risks and liability associated with such use. Any
statements related to the product, which are not contained in 3M’s current publications, or any contrary statements
contained on your purchase order, shall have no force or effect unless expressly agreed upon, in writing, by an
authorized officer of 3M.
This product will be free from defects in material and manufacture at the time of purchase.
3M MAKES NO OTHER
WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE.
If this product is defective within the warranty period stated above, your
exclusive remedy shall be, at 3M’s option, to replace or repair the 3M product or refund the purchase price of the 3M
product.
Except where prohibited by law, 3M will not be liable for any direct, indirect, special, incidental or
consequential loss or damage arising from this 3M product, regardless of the legal theory asserted.
Warranty; Limited
Remedy; Limited
Liability
3M is a trademark of 3M Company.
Electrical Markets Division
6801 River Place Blvd.
Austin, TX 78726-9000
800 676 8381
FAX: 800 828 9329
www.3M.com/electrical/oem
Please recycle.
© 3M 2016 All rights reserved.
78-8124-4758-5 E
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