Insulating tape 3M SUPER33+ 50 mm x 33 m, black

3M SUPER33+ insulating tape, 50 mm x 33 m in black, is a flame-retardant vinyl electrical tape designed for insulation, splicing and cable bundling. The tape provides flexible conformability and reliable dielectric properties for a range of general-purpose and professional electrical tasks. Its construction delivers abrasion resistance and moisture protection for both indoor and outdoor applications, making it suitable for routine maintenance and repair work on wiring and cable harnesses.

Advantages

The vinyl adhesive formulation offers consistent tack and good elongation, allowing the tape to follow contours and form tight, secure wraps. Flame-retardant properties reduce the risk of fire propagation around insulated joints. The tape resists abrasion, moisture and moderate temperature variation, which helps preserve insulation integrity over time. Its 50 mm width and 33 m length provide efficient coverage for common splicing and bundling jobs while minimizing overlaps and waste.

Suitable for

• Electrical insulation of splices, joints and terminations
• Bundling and securing cable harnesses
• Repairing minor insulation damage on wires and cords
• Color-coding and identification of circuits (where black is appropriate)
• Indoor and outdoor maintenance and service tasks

Key specifications

• Material: PVC (vinyl) backing with pressure-sensitive adhesive
• Flame resistance: flame-retardant construction suitable for electrical insulation
• Width: 50 mm
• Length: 33 m
• Color: black
• Physical properties: flexible, conformable, good elongation and tear resistance
• Protection: moisture and abrasion resistant for general-purpose use

How to use

Clean and dry the surface before application to ensure optimal adhesion. Start wrapping at one end of the splice or cable, stretching the tape slightly and overlapping each turn by about half the tape width to form a uniform, gap-free layer. For thicker insulation build-up, apply multiple layers as needed, finishing with a smooth end tuck or a final wrap to secure the tape. Use appropriate personal protective equipment when working on live circuits and follow applicable electrical safety standards and lockout/tagout procedures.

Usage recommendations

Store the tape in a cool, dry place away from direct sunlight and high heat. For long-term outdoor exposure or specialized applications requiring higher heat tolerance or UV resistance, assess whether a tape with specific high-temperature or UV-stable properties is more suitable.