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Roll of shiny silver aluminum foil tape, one inch wide, 250 rolls in package

3M

3M 425 Foil Tape 1 in Silver PK250

SKU CH-VMH1-53KTJ

Aluminium foil tape with acrylic adhesive withstands 300 °F and meets UL 723, UL 746C, ASTM and FAR 25.853 standards

  • ColorSilver
  • Withstands 300 °F heat for demanding sealing tasks
  • Acrylic adhesive bonds securely across wide temperature range
  • 97 mil aluminum foil backing resists tears and moisture
  • Meets ASTM D3330, D3652, D3759, D3833 and UL 723/746C standards
  • 250-roll pack keeps large projects supplied without reordering

3M 425 Foil Tape Specifications

3M 425 Foil Tape is an aluminium foil tape with an acrylic adhesive system. It is supplied in a package quantity of 250 rolls, each measuring one inch in width. The product meets multiple industry standards including ASTM D3330, D3652, D3759 and D3833. It is designed for HVAC sealing and general industrial applications.

High-Temperature Performance

The tape backing and adhesive are rated for continuous exposure up to 300 degrees Fahrenheit. It complies with SAE AMS-T-23397 and FAR 25.853 (a) for flame resistance. The construction maintains bond integrity under sustained thermal cycling. Acrylic adhesive provides reliable adhesion on metal ductwork and insulation facing.

Standards Compliance and Construction

Total tape thickness is 1.97 mil, combining the foil backing and adhesive layer. The product carries UL 723 and UL 746C listings for surface burning characteristics. It also meets L-T-80B military specification requirements. Silver colour allows easy visual inspection of sealed joints. No liner is included with this roll format.

Highlights

  • Withstands 300 °F heat for demanding sealing tasks
  • Acrylic adhesive bonds securely across wide temperature range
  • 97 mil aluminum foil backing resists tears and moisture
  • Meets ASTM D3330, D3652, D3759, D3833 and UL 723/746C standards
  • 250-roll pack keeps large projects supplied without reordering

Specifications

Brand3M
ColorSilver

Questions about this item

Does the 1.97 mil foil backing resist heat buildup when the tape runs continuously at 300 °F?

The aluminum foil backing and acrylic adhesive are rated for continuous exposure up to 300 °F, so the tape maintains adhesion without softening or degrading during all-day high-temperature operation.

What surface preparation or primer is required before applying the 425 series foil tape?

Clean the substrate so it is dry, free of oil, dust and loose particles; the acrylic adhesive bonds directly to clean metal, flex duct or insulation facing without a separate primer.

Will the 1 in wide rolls adhere reliably to the galvanised ductwork already installed in my building?

Yes — the acrylic adhesive meets ASTM D3330 and UL 723 requirements and is designed to bond securely to galvanised steel and other common HVAC metals.

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