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Scotch® 77 Arc & Fire Proofing Tape

Scotch® 77 Tape is a 0.762mm thick, arc and fireproofing tape designed to protect all types of electrical cables. Its unique formulation allows the manufacture of an unsupported elastomer that expands in fire to provide a thick char build-up between the flame and cable. This insulating firewall acts as a heat shield and flame barrier, thus protecting the cables and accessories.

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  • Features + Applications
  • Specifications
  • Video + Downloads
  • Features

    • Clean and easy to apply

    • Provides fault arc protection to adjacent wrapped cables

    • Provides additional electrical insulation

    • Resists U.V., water, salt water, acids and sewage

    • Colour = Black

    • Available in 38mm x 6m, 78mm x 6m


    • To fire and arc proof control cables when high energy power cables are present

    • To fire and arc proof all cables in areas where possibility of fire hazard exists

    • To provide additional electrical insulation, thus reducing possibilities of transferred arcs

    • To fire and arc proof piping systems (ie. gas, water, or oil lines)

    • To fire and arc proof high-energy power cables where exposed to failures of other high-energy cables (

    • The installed tape to be secured with 2 layers of 69 glass cloth tape

  • Specifications





    Temperature Range

    Withstand extreme temperatures of a high current fault arc (13,000°K)



    Material Type

    Unsupported Intumescent Elastomer


    -18°C : 90%, -12°C : 130%, 23°C : 150%

    Width x Length

    38mm x 6m, 72mm x 6m

    Dielectric Strength

    Electrical Arc Resistance Simulated High current fault arc (13,000°K) – One half-lap layer: 75 cycles, Two half-lap layers: 145 cycles

    Breaking Strength

    1500 PSI

    Thermal Conductivity

    23°C – .078 BTU/hr./ft. °F

    Adhesion to Steel

    Not adhesive coated, it must be held in place after wrapping with bands of Scotch™ 69 Glass Cloth Electrical Tape

    Adhesion to Backing

    Not adhesive coated, it must be held in place after wrapping with bands of Scotch™ 69 Glass Cloth Electrical Tape

    Flame Retardant

    Self Extinguishing

  • Brochures

    • Electrical Tapes Brochure


    • Scotch® 77 Arc & Fire Protection Elastomer Datasheet
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