Adhesive tape 3M Scotch 389 25 mm x 50 m — high adhesion, black

3M Scotch 389 is a black, high-adhesion adhesive tape with a 25 mm width and 50 m length designed for applications that require strong, durable bonding. The tape combines a pressure-sensitive adhesive with a conformable backing to provide reliable holding power on a variety of surfaces. It is intended for sealing, splicing, general-purpose repair and situations where long-lasting adhesion is important in both industrial and household environments.

Advantages

The tape offers high initial tack and sustained adhesion, ensuring a secure bond soon after application and maintaining hold over time. Its black color provides a discreet finish or visual contrast depending on the application, while the 25 mm width and 50 m roll length suit both small jobs and extended use. The conformable backing allows the tape to follow contours and irregular surfaces, improving contact and reducing the risk of lifting.

Suitable for

• Sealing cables and wire harnesses
• Splicing and temporary jointing of materials
• General-purpose repairs at home or in workshops
• Masking and bundling tasks where high adhesion is required

Key specifications

• Color: black
• Width: 25 mm
• Length: 50 m
• Adhesion type: high-adhesion, pressure-sensitive adhesive
• Backing: conformable coated film
• Typical uses: sealing, splicing, general repair

How to use

Ensure surfaces are clean, dry and free from oil, dust or loose particles before application. Measure and cut the required length, then press the tape firmly onto the surface, smoothing from the center toward the edges to remove air pockets and improve contact. For best results on irregular surfaces, mold the tape by applying uniform pressure along contours. When used for splicing or sealing, overlap ends by a few millimeters to secure the joint. Remove by peeling back slowly at a low angle to reduce residue; for long-term applications, test on a small area to verify compatibility with the substrate.

Recommendations

Store rolls in a cool, dry place away from direct sunlight and extreme temperatures to preserve adhesive performance. For critical or permanent installations, perform an adhesion test on the specific substrate and consider mechanical fasteners in combination with the tape where appropriate.