Self-fusing Rubber Tape 3M 80-0140-0009-7 — 9 m × 25 mm, Light Grey (RAL 7035)

3M self-fusing rubber tape 80-0140-0009-7 is a self-amalgamating insulating tape supplied in a 9 m length and 25 mm width in Light Grey (RAL 7035). The tape has a silicone-based rubber composition that fuses to itself without adhesive, creating a seamless, flexible and weather-resistant layer. It is designed to provide electrical insulation, mechanical protection and moisture sealing for a variety of indoor and outdoor applications where a conformal, vibration-damping coating is required.

Advantages

The tape bonds to itself to form a continuous rubber sleeve that resists water ingress and provides stable electrical insulation without leaving sticky residue. Its silicone-like material remains flexible across a wide temperature range and absorbs vibration, reducing stress on joints and connectors. The light grey color (RAL 7035) offers a neutral appearance for visible installations and helps with visual identification while maintaining UV and weather resistance for outdoor exposures.

Suitable for

• Insulating electrical splices and connections
• Repairing and protecting cables and cable jackets
• Sealing joints, threads and terminal blocks against moisture
• Temporary or permanent vibration-damping wraps
• Protecting connectors, sensors and small housings in indoor and outdoor environments

Key specifications

• Length: 9 m
• Width: 25 mm
• Color: Light Grey (RAL 7035)
• Material: self-fusing silicone/rubber compound
• Adhesive type: self-amalgamating (no separate adhesive)
• Function: electrical insulation, moisture sealing, vibration damping
• Application environment: suitable for indoor and outdoor use; resistant to water and weather

How to use

Before applying, ensure surfaces are clean, dry and free of grease or loose debris. Stretch the tape slightly as you wrap it around the object so the material fuses to itself; overlap each turn by approximately 50% to form a uniform, continuous sleeve. Start and finish the wrap beyond the area to be protected to ensure complete sealing. For electrical insulation, extend the wrap to cover the insulation transition zones and maintain adequate overlap to achieve the required dielectric thickness. No primer or solvent is required for bonding.

Usage recommendations

For best results, apply at ambient temperatures and avoid stretching to the point of tearing. When used outdoors, allow the fused layer to cure before exposing to prolonged mechanical abrasion. Replace tape on heavily damaged or oil-contaminated surfaces to ensure continued insulating performance.