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Silver polyester film tape roll, 2 inches wide, 72 yards long, matte finish

3M

3M 850 Silver Polyester Film Tape 2 in x 72 yd

SKU CH-SQTK-VEFTA

Silver polyester film tape with acrylic adhesive, 2 in wide by 72 yd long, withstands -60 to 300 °F

  • Wide 2-inch roll covers large areas fast
  • Silver polyester film resists heat up to 300 °F
  • Acrylic adhesive holds strong at 30 oz/in
  • Thin 1.9 mil backing conforms to irregular shapes
  • 72-yard continuous roll reduces reload downtime

Silver Polyester Film Tape

The 3M 850 is a single-sided silver polyester film tape with an acrylic adhesive. It comes in a continuous roll measuring 2 in wide by 72 yd long on a 1 1/2 in core. The tape is designed for electrical insulation and general-purpose holding where a thin, conformable backing is required.

Sustained temperature performance

The tape operates continuously from -60 Degrees F up to 300 Degrees F without losing adhesion or backing integrity. Its 1.9 mil thickness provides consistent dielectric strength across that range. The acrylic adhesive maintains a 30 oz/in bond to steel while the polyester backing delivers 28 lb-in tensile strength under prolonged stress.

Replaces cloth or rubber tapes

This film tape upgrades from bulkier cloth or rubber electrical tapes when a thinner profile and higher temperature rating are needed. The jump is worth it for harness wrapping, coil insulation or masking where 1.9 mil thickness reduces build-up and the 300 Degrees F limit prevents adhesive bleed. It is not for applications requiring a thicker cushioning layer or a non-silver colour code.

Highlights

  • Wide 2-inch roll covers large areas fast
  • Silver polyester film resists heat up to 300 °F
  • Acrylic adhesive holds strong at 30 oz/in
  • Thin 1.9 mil backing conforms to irregular shapes
  • 72-yard continuous roll reduces reload downtime

Specifications

Brand3M

Questions about this item

How does the 1.9 mil thick polyester backing handle continuous exposure near the 300 °F upper temperature limit?

The 1.9 mil polyester backing with acrylic adhesive is rated for continuous performance up to 300 °F and down to -60 °F, maintaining its 28 lb-in tensile strength and 30 oz/in adhesion across that range.

What surface preparation or primer is required before applying the acrylic adhesive on this 850 series tape?

The acrylic adhesive bonds directly to clean, dry surfaces without a separate primer; ensure the substrate is free of oil, dust and moisture for full 30 oz/in adhesion.

Will the 1 1/2 in core fit the standard dispenser I already use for 2 in wide masking tapes?

Yes, the roll uses a 1 1/2 in core diameter, which matches the common industry size for 2 in wide tape dispensers.

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