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Roll of shiny silver aluminum foil tape, one inch wide

3M

3M 425 Foil Tape 1 in x 5 yd Silver

SKU CH-DMQX-HAMT9

Aluminium foil tape withstands -65 °F to 300 °F for indoor or outdoor sealing and repair

  • ColorSilver
  • Operates from -65 °F to 300 °F for extreme environments
  • 1 in x 5 yd roll covers joints and seams efficiently
  • Aluminum foil backing resists moisture and flame in HVAC systems
  • 3M 425 series trusted across automotive, aviation and construction
  • Continuous roll format allows custom lengths without waste

3M 425 Foil Tape — HVAC sealing

This aluminium foil tape is built for HVAC controls and general maintenance across automotive, aviation, construction and electronics environments. It performs reliably indoors and outdoors, providing a continuous roll for assembly, manufacturing and repair tasks. The silver finish suits ductwork and component sealing where a clean, professional appearance matters.

Replaces cloth duct tape and mastic

Switch to this foil tape when a job demands temperature resistance from -65 to 300 degrees F and a moisture-resistant bond that cloth tape cannot hold. The upgrade is worth it for joints exposed to thermal cycling, vibration or outdoor weathering where traditional sealants crack or peel over time.

Handles ducts, seams and component shielding

The 1 in x 5 yd roll covers typical residential and light-commercial duct seams, equipment connections and EMI shielding patches with comfortable headroom. It runs out on large commercial trunk lines or projects requiring multiple full wraps per joint, where a wider or longer roll would reduce splice count.

Highlights

  • Operates from -65 °F to 300 °F for extreme environments
  • 1 in x 5 yd roll covers joints and seams efficiently
  • Aluminum foil backing resists moisture and flame in HVAC systems
  • 3M 425 series trusted across automotive, aviation and construction
  • Continuous roll format allows custom lengths without waste

Specifications

Brand3M
ColorSilver

Questions about this item

What width and length roll do I need to cover a seam with this 1 in x 5 yd foil tape?

The roll is one inch wide and five yards long, giving a continuous length for sealing joints.

How do I apply the 3M 425 tape so it bonds properly, and what step is often missed?

Clean the surface, remove the liner, press firmly with a roller to activate the acrylic adhesive; skipping the roller leaves gaps.

When will the 3M 425 foil tape need replacing in a duct that sees -65 to 300 °F cycles?

The acrylic adhesive and aluminum backing are rated for that full range; replace only if the foil tears or adhesion fails.

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