3M
3M 850 Film Tape Black 1-1/2 in 72 yd Acrylic
Black polyester film tape with acrylic adhesive, 72-yard roll for electrical insulation from -60°F to 300°F
- Wide temperature range from -60 °F to 300 °F
- Strong 28 lb-in tensile strength for demanding holds
- Reliable 30 oz/in acrylic adhesion on one side
- Thin 1.9 mil polyester backing conforms to surfaces
- Long 72-yard roll reduces changeover frequency
3M 850 Film Tape Black 1-1/2 in 72 yd
This 3M 850 film tape is a black polyester tape with a single-sided acrylic adhesive. It comes in a continuous roll measuring 1-1/2 inches wide and 72 yards long on a 1-1/2 inch core. The tape is designed for electrical and general-purpose applications requiring a durable, high-performance backing. It suits professionals and technicians needing reliable insulation, bundling, or masking solutions.
Thermals noise and power draw
The tape operates reliably across a wide temperature range from -60 degrees F up to 300 degrees F. Its polyester backing and acrylic adhesive maintain bond integrity and physical stability through thermal cycling without softening or becoming brittle. As a passive adhesive product, it generates no noise and draws no power during use or storage. Performance depends on surface preparation and application pressure rather than electrical input.
Upgrades and replacements
This tape replaces cloth, vinyl, or lower-grade polyester tapes when higher tensile strength of 28 lb-in and adhesive strength of 30 oz/in are required. The 1.9 mil thickness provides a conformable yet tough barrier suitable for demanding insulation or wrapping tasks. It is not intended for applications needing conductive properties, extreme abrasion resistance beyond the polyester rating, or widths and lengths other than the specified 1-1/2 inch by 72 yard roll.
Highlights
- Wide temperature range from -60 °F to 300 °F
- Strong 28 lb-in tensile strength for demanding holds
- Reliable 30 oz/in acrylic adhesion on one side
- Thin 1.9 mil polyester backing conforms to surfaces
- Long 72-yard roll reduces changeover frequency
Specifications
| Brand | 3M |
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Questions about this item
How do I apply the 1.9 mil 850 film tape without trapping air bubbles?
Clean the surface, then unwind the 1-1/2 in wide polyester roll slowly while pressing firmly with a roller or thumb to push air out ahead of the acrylic adhesive.
When will the acrylic adhesive on the 850 tape need replacement?
Replace the roll when the 30 oz/in adhesion drops noticeably or the black polyester backing shows cracking after prolonged exposure near the 300 °F upper limit.
What fails first on the 850 tape during continuous high-temperature use?
The acrylic adhesive softens as it approaches the 300 °F maximum performance temperature, causing shear loss before the 28 lb-in tensile strength of the polyester backing is reached.
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