Sealing tape 3M 9508B19 — black/green acrylic polyurethane, 66 m roll, 19 mm width

Sealing tape 3M 9508B19 is a self-adhesive tape composed of acrylic and polyurethane materials, presented in a black and green combination on a 66 m roll with a 19 mm width. Designed for sealing joints, protecting edges and general-purpose sealing, the tape provides a conformable, durable layer that adheres to many common building and repair surfaces. The product combines the flexibility of polyurethane with the adhesive properties of acrylic to deliver consistent performance during installation and in service.

Advantages

The tape offers long roll length and narrow width for precise application along seams and gaps. Its acrylic/polyurethane composition ensures good conformability around irregular shapes and stable adhesion to a variety of substrates. The self-adhesive backing simplifies installation by eliminating the need for additional adhesives or primers in many applications, while the material composition provides resistance to aging, moderate mechanical stress and common environmental influences encountered in repair and assembly tasks.

Suitable for

• Sealing expansion joints, gaps and seams in construction and renovation
• Edge protection on panels, trim and profiles during transport or installation
• General repair and maintenance tasks requiring a conformable sealing tape
• Applications where a narrow, long roll is needed for repeated precise cuts

Key specifications

• Composition: acrylic adhesive with polyurethane backing
• Color: black and green
• Length: 66 m per roll
• Width: 19 mm
• Form: self-adhesive roll
• Conformability: suitable for irregular surfaces and edges

How to use

Prepare the application surface by ensuring it is clean, dry and free of dust, oil or loose particles. Unwind the tape from the roll and cut to the required length. Align the tape over the joint or edge and press firmly to ensure full contact with the substrate; use a roller or a firm thumb pressure to improve adhesion and remove trapped air. For best adhesion, apply at moderate temperatures and avoid stretching the tape during application. If overlapped joints are required, ensure a minimum overlap to maintain continuous sealing.

Usage recommendations

Store rolls in a cool, dry place away from direct sunlight and sources of heat. Prior testing is recommended when using on unfamiliar substrates or in critical sealing applications. For long-term outdoor exposure or chemically aggressive environments, verify compatibility and consider additional protective measures.