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3M™ Glass Cloth Electrical Tape 27
with Pressure-Sensitive Rubber
Thermosetting
Description 3M™ Glass Cloth Electrical Tape 27 is a 7-mil woven insulating glass cloth tape with
pressure-sensitive rubber thermosetting adhesive. This tape is designed to operate in
600-volt dry applications requiring high mechanical strength and resistance to high
temperatures. The glass cloth is specially treated and prepared to provide corrosion-free
protection. The glass cloth will not shrink, rot or burn, has a high tensile strength and is
printable.
Agency Approvals,
Self Certifications,
MIL Specs Meets Requirements of:
• UL Recognized Component listing for 302° F (150° C), Guide OANZ2, File E17385
• CSA Accepted Component 266° F,(130° C), File LR93411
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 ma y
be based in whole or in part on information provided by third party suppliers to 3M.
Applications • Insulating electric and induction-type furnace power supply leads
• Securing systems requiring high mechanical strength and resistance to high
temperatures
• Splicing wire SF and SFF rated 302° F (150° C), 356° F (180° C)
• Insulating motor lead connectors, switchers and controls for furnaces and ovens
• Insulation in coil wrapping outerwrap
• Provides heat stable insulation for hot spot applications
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Data Sheet October 2008
3M™ Glass Cloth Electrical Tape 27
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Typical Properties
Data is not for specifications. Values are typical and should not be considered mi nimum or maximum.
Properties measured at room temperature 73 ° F (~23° C) unless otherwise stated.
Physical
Electrical
Specifications The tape is a glass cloth electrical tape with a rubber thermosetting adhesive. The tape
shall be white and 7 mils (0,177 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 be UL Recognized under UL Standard 510. The tape
shall perform at a temperature of 302° F (150° C) without loss of physical or electrical
properties.
Engineering/ All splices for 600-volt wire rated at 266° F (130° C) shall be insulated with a minimum of
Architecture two half-lapped layers of 3M™ Glass Cloth Electrical Tape 27.
Shelf Life & This product has a 5-year shelf life from date of manufacture when stored in a humidity
Storage controlled storage (50°F/10°C to 80°F/27°C and <75% relative humidity).
Property (Test Method)
(ASTM D1000 unless noted) Typical Value
US units (metric)
Color white
Adhesive rubber thermosetting
Backing Thickness 5.0 mils (0,125 mm)
Tot a l Thickness 7.0 mils (0,177 mm)
Elongation (% at break) 5%
Operating Temperature 150° C
Adhesion to Steel 30 oz/in (3.3 N/10 mm)
Property (Test Method)
(ASTM D1000 unless noted) Typical Value
US units (metric)
Dielectric Breakdown 3000 V
Breaking Strength 150 lbs/in (252 N/10 mm)`
Insulation Resistance 4.8 x 104 megohms
CTI Material Group 1
Electrolytic Corrosion Factor
3M Test Method
0.9
3M™ Glass Cloth Electrical Tape 27
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Availability Tape 27 is available in standard and custom lengths and widths. Standard length is 60
yards.
Please contact your local distributor. Names and addresses are available from
3M.com/electrical [Whe re to Buy], or call 1-800-676-8381 or 1-800-245-3573.
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 guar anteed. Before using this produc t, 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.
Warrant y; Limited This product will be free from defects in material and manufacture at the time of purchase. 3M MAKES
Remedy; Limited NO OTHER WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF
Liability 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 re pair the 3M product
or refund the purchase price of the 3M product. E xcept w here prohibited b y law, 3M will not be liable for any
indirect, special, incidental or consequential loss or damage arising fro m this 3M product, regardless of
the legal theory asserted.
3M is a trademark of 3M Company.
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Electrical Markets Division
6801 River Place Blvd.
Austin, TX 78726-9000
800 676 8381 or 800 245 3573 Please recycle.
FAX: 800 828 9329 or 800 245 0329 © 3M 2008 All rights reserved.
www.3M.com/electrical/oem 78-8111-0895-6_B
