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3M™ Tape 77 (7100004537, 7100004701) is a professional-grade Fire-Retardant Arc Proofing Tape. It’s designed to protect electrical cables from fire and arc hazards in demanding industrial environments. Made from a highly flexible intumescent elastomer, 3M Tape 77 expands under extreme heat. This forms a thick, insulating char barrier between adjacent cables and surrounding flames. This Scotch Tape 77 offers arc-proofing performance up to 600V and can be applied with ease across a wide range of cable types, especially in confined or irregular spaces.
Part Numbers: 7100004537, 7100004701.
Engineered for electrical maintenance, construction, utility, and renewable sectors, Scotch 77 provides an essential layer of passive fire protection for vulnerable cable installations. Its conformable, non-adhesive design ensures fast, wrinkle-free wrapping without the need for additional tools or adhesives. Once exposed to fire, this Fire-Retardant Arc Proofing Tape self-extinguishes and forms a tough char, shielding cables and extending critical system uptime. Whether you’re safeguarding against arc propagation or protecting bundled circuits in tight enclosures, 3M 77 delivers proven, fire-rated performance in high-risk environments.
Fire-retardant tape expands to form a protective char in arc or flame exposure
Conformable elastomer backing wraps neatly around irregular shapes
Helps protect adjacent cables from flame and arc failures
UL Listed and RoHS 2011/65/EU compliant
Self-extinguishing, arc-proofing performance up to 600V
Flexible and removable for easy cable inspection
Dielectric strength: 19.7 kV/mm
Professional-grade 30 mil (0.76 mm) thick intumescent construction
Available in 38.1 mm (1.5 in) and 76.2 mm (3 in) widths, 6 m (20 ft) roll
Ideal for construction, utilities, industrial maintenance, and renewable energy
Suitable for use in wind farms, substations, solar arrays, and mining operations
From commercial construction to high-voltage industrial sites, 3M 77 offers reliable arc proofing and flame resistance exactly where it matters. By expanding into a dense thermal barrier on exposure, this 3M Duct Tape 77 prevents cascading faults across cable networks, protecting both equipment and personnel. Whether you’re retrofitting arc containment in a utility cabinet or reinforcing cable trays in mining operations, Tape 77 ensures fast, efficient installation without compromising on safety or durability.
When passive fire protection is non-negotiable, choose this product for peace of mind in high-risk zones.
For Additional Information on 3M Scotch Fire-Retardant Electric Arc Proofing Tape 77 (7100004537, 7100004701), please consult the Technical Data Table or PDF File below.
*Technical Data subject to change without notice.
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| TYPICAL PROPERTIES | |
|---|---|
| Adhesive Type | Application/Industry |
| Adhesive TypeNon-Adhesive | Application/IndustryCommercial Construction, Industrial Construction, Maintenance and Repair Operations, Mining, Utility, Wind Power, Residential Construction, Solar |
| TYPICAL PROPERTIES - CONTINUED | |
| Min Operating Temp (℃) | Product Colour |
| Min Operating Temp (℃)0℃ | Product ColourBlack |
| PHYSICAL PROPERTIES | |
| Elongation (% at Break) - 23°C | Elongation (% at Break) - -12°C |
| Elongation (% at Break) - 23°C150% | Elongation (% at Break) - -12°C130% |
| ELECTRICAL AND THERMAL PROPERTIES | |
| Dielectric Strength | Thermal Conductivity (23°C) ASTM C518 |
| Dielectric Strength>10 kV | Thermal Conductivity (23°C) ASTM C5180.15 BTU-ft (0,25 W/mk) ft2 -hr-°F |
| DIMENSIONS AND CLASSIFICATIONS | |
| Overall Length (ft) | Overall Length (m) |
| Overall Length (ft)20 | Overall Length (m)6 |
