Lanmar #Black4 is a 4 mil black PTFE coated fiberglass tape with a silicone adhesive and yellow release liner. The black PTFE coating delivers the same non-stick, chemical-resistant, and high-temperature performance as standard PTFE fiberglass tape, with a black finish suited for applications where appearance or light absorption matters.

The silicone adhesive bonds securely to metal sealer bars, platens, and industrial process surfaces. Rated from -100 to +550°F. Dielectric strength: 10,000V.

Specifications: 4 mil PTFE backing / 6 mil total thickness. Break strength: 115 lb/in. Elongation: <4. Adhesion: 45 oz/in.

Includes a yellow release liner for clean handling and precise application without adhesive contact during positioning.

Common applications include packaging equipment platen covers, heat sealer bar wrapping, light-absorbing non-stick surfaces, and industrial release applications. Supplied in roll form with release liner. Available custom slit to width.