3M Scotch 77 Fire-Retardant El...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$288.57
3M Scotch 77 Fire-Retardant Electric Arc Proofing Tape

3M Scotch 77 Fire-Retardant Electric Arc Proofing Tape

(No reviews yet) Write a Review

Model: 77Black-1-1/2x20FT

In Stock (leaves warehouse same day if ordered before 3pm ET)

$288.57
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like
Scotch Fire-Retardant Electric Arc Proofing Tape 77, 1-1/2 in x 20 ft, Black, 1 roll/carton, 10 rolls/case

  • Legal Disclaimer

    • Note: 3M products offered on a government contract that require country of origin representation must be certified by 3M Trade Compliance. Contact customer service at 800-245-3573 to request a certificate.
    • The designation that a product is Manufactured in the USA means the product undergoes substantial transformation in one of our U.S. Manufacturing plants. Some products contain imported components.
    • Manufacturing Origin: USA

  • Overview

    • Scotch Flame-Retardant Tape 77 has an intumescent elastomer backing that generates a thick, insulating charred buildup when exposed to high temperatures. The tape has a specially formulated adhesive that expands in fire to form a thick, char buildup between the flame and the cable. This firewall acts as a heat shield and flame barrier to protect the nearby cables and accessories. The splicing, insulating tape offers fault-arc protection to cable accessories and adjacent wrapped cables. UL Listed and RoHS 2011/65/EU Compliant.
    • Tape measures 1-1/2 in x 20 ft x 30 mil
    • For protecting most types of electrical cables when exposed to potential failures in an adjacent cable
    • Conformability offers virtually wrinkle-free wrapping with minimal effort
    • Scotch Tape 77 is a 30-mil thick, premium-grade, flame-retardant, electric arc proofing tape. This tape is 600V-rated and is suitable to protect most types of electrical cables when exposed to potential failures in an adjacent cable. It is designed with a flexible unsupported elastomer, which makes it easy-to-apply and easy-to-remove for cable inspection.
    • Intumescent elastomer backing
    • 1 roll/carton, 10 rolls/case
    • UL Listed and RoHS 2011/65/EU Compliant


77Black-1-1/2x20FT - spec sheet

Product Specs

Elongation:
150%
Application:
Electrical Maintenance
Adhesive Material:
Non-Adhesive
Product Length:
20 Linear Foot
Shelf Life:
5 Year
Specifications:
Consolidated Edison Co. Test EO-5343-14
Department:
Electrical
Breaking Strength:
36 lb/in
Thickness Metric:
0.76 mm
Tape Grade:
Premium
Self Extinguishing:
Yes
Thickness:
30 mil
Rolls Per Carton:
1
Rohs Eu Comments:
Contact 3M for information
Product Type:
Arc Proofing Tape
Tape Type:
Insulating and Splicing
Family:
Scotch® Fire-Retardant and Electric Arc Proofing Tape 77/77W
Rohs 2011 65 Eu Compliant:
Undetermined
Backing Material:
Intumescent Elastomer
Product Color:
Black
Product Material:
Intumescent Elastomer
Rolls Per Case:
10
Uv Resistant:
Yes
Length Metric:
6 m
Product Group:
Cable Management & Identification
Product Subgroup:
Electrical Tape

3M 77Black-1-1/2x20FT – Frequently Asked Questions

1) What does 3M Scotch 77 arc proofing tape actually do in a cable fault?
Scotch 77 has an intumescent elastomer backing that chars and expands when hit by high heat, building a thick insulating layer between the flame or arc and the cable. That char acts as a heat shield and flame barrier, so a fault in one cable does not take out the cables and accessories wrapped beside it. It is rated 600V and 30 mil thick.
2) Is 3M Scotch 77 tape sticky, and how do I keep the wrap in place?
It is a non-adhesive tape. The 77 is an unsupported elastomer that relies on conformable tension wrapping rather than glue, which is also why it strips off cleanly later when you need to open a splice for inspection. Because there is no adhesive bond, the wrap is normally banded or taped off at the ends to hold it.
3) Will Scotch 77 tape hold up in an outdoor or manhole location?
Yes, the 77 is UV resistant and self-extinguishing, so exposed vault, manhole and outdoor duct work is within its range. It also meets Consolidated Edison Co. Test EO-5343-14, which is the utility arc-proofing spec many distribution specs reference.
4) How many rolls of 3M 77 come in a case, and how is it packed for a stockroom?
Each carton holds one roll, and a full case is 10 rolls. For MRO stores standardizing on arc proofing, the tape carries a 5 year shelf life, so a case can sit on the shelf between outages without turning over.
5) Can Scotch 77 be used as regular electrical insulating tape instead of vinyl?
It is classed as an insulating and splicing tape and is 600V rated, but its job is arc and flame protection over cables and accessories, not general conductor taping. Since it carries no adhesive, it will not seat and seal like a vinyl electrical tape. Use vinyl or a rubber splicing tape for the electrical build-up, then overwrap with 77 for the fire and arc barrier.
How fast can I get the 3M 77Black-1-1/2x20FT delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the 3M 77Black-1-1/2x20FT come with a warranty?
Absolutely. The 3M 77Black-1-1/2x20FT is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the 3M 77Black-1-1/2x20FT?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the 3M 77Black-1-1/2x20FT from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!