27 - Scotch® Glass Cloth Electrical Tape

3M

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ADHESIVE TAPE FEATURES

7.0 mil. thermosetting rubber adhesive
Woven glass cloth backing

ADHESIVE TAPE ADVANTAGES

Excellent tensile and dielectric strength
Heat stable insulation for hot spot applications
Resistant to high tempeartures
Corrosion-free protection

ADHESIVE TAPE APPLICATIONS

Insulating electric and induction type furnace power supply leads
Securing systems requiring high mechanical strength and resistance to high temperatures
Splicing wire that is rated 266°F
Insulating motor lead connections, switches and controls for furnaces and ovens
Reinforcing insulation in electrical installations where heavy loads cause high heat and breakdown of original insulation (e.g., motor leads and switches)

ADHESIVE TAPE MARKETS SERVED

Electrical
Industrial

ADHESIVE TAPE COLORS

White

GENERAL INFORMATION

3M 27 is a 7.0 mil tape consisting of thermosetting rubber adhesive with a woven glass cloth backing primarily used for insulating, securing, splicing and reinforcing applications. 27 tape is designed to operate in 600volt dry applications requiring high mechanical strength and resistance to high temperatures. The glass cloth backing is specially treated and prepared to provide corrosion-free protection and will not shrink, rot or burn. This tape contains a pressure-sensitive thermosetting adhesive which performs at a Class B temperature of 266°F. All splices for 600volt wire rated at 266°F should be insulated with a minimum of two half-lapped layers of Scotch 27 Glass Cloth Electrical Tape.

PRODUCT CONSTRUCTION

	Type	Mil Thickness

Backing	Fiberglass
Adhesive (unwind)	Rubber (thermosetting)
Thickness (total)		7.00

PRIMARY PHYSICAL PROPERTIES

	Unwind Side	Liner Side

Adhesion-to-Steel - 180° Peel	40.00 oz/in
Adhesive Activation	Pressure
Tensile Strength	150.00 lbs/in
Elongation Percent	5.00%
Testing Info: Peel Adhesion: ASTM D1000; Thickness: ASTM D1000; Tensile: ASTM D1000; Elongation: ASTM D1000

SECONDARY PHYSICAL PROPERTIES

THERMAL / ELECTRICAL PROPERTIES

Minimum Application Temperature	40°F
Minimum Service Temperature	0°F
Maximum Short-Term Temperature	266°F
Direct Electrolytic Corrosion Factor	0.90 Factor
Dielectric Strength	3000.00 volts

Adhesive Tape and Foam Converting Services

The physical properties listed are typical values and are not to be considered as specifications. Our suggestions for use are based on tests we believe to be reliable. However, the purchaser must carry out their own tests to determine the suitability of the product for their internal use. Information is given in good faith, but without warranty.
It is essential, as with all pressure-sensitive tapes, that the surface to which the tape is applied be clean, dry and free of grease and oil.
Shelf life from date of manufacture is based on the product being stored at 70°F(21°C) / 50% relative humidity out of direct sunlight.
Specification compliance is dynamic and should only be used as a general guide. Always confirm that the tape you are interested in currently complies with all specification requirements. Please verify that the product number that you select is available in the proper size and color to meet your specification.