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Silver aluminium foil tape roll, 2 in wide, 5 yd long

3M

3M 433 Foil Tape, Silver, 2 in x 5 yd

SKU CH-W49C-BWDKY

Aluminum foil tape withstands -65 to 600 degrees Fahrenheit for HVAC sealing

  • Product colorSilver
  • Withstands extreme heat up to 600°F
  • Remains flexible in severe cold down to -65°F
  • Suitable for indoor and outdoor environments
  • Trusted 3M brand for professional reliability
  • Continuous roll format for versatile application

HVAC foil tape for industrial sealing

3M 433 foil tape is an aluminum-backed roll built for assembly, manufacturing, automotive, aviation, construction, electronics and general maintenance tasks. The continuous roll suits indoor and outdoor environments where a reliable metal-faced seal is required. It serves technicians who need a single product across multiple trades.

Fits ductwork, panels and equipment wraps

The 2-inch by 5-yard roll conforms to irregular surfaces and seals joints without mechanical fasteners. It eliminates the need for separate mastics or liquid sealants in many HVAC and sheet-metal jobs. The pressure-sensitive adhesive bonds on contact, freeing up time otherwise spent mixing or curing compounds.

Withstands -65 to 600 degrees Fahrenheit

The tape maintains adhesion and structural integrity across the full rated temperature span, resisting thermal cycling in exhaust systems and cold-storage lines. Aluminum backing reflects radiant heat and resists moisture, reducing the risk of adhesive failure. No power draw or moving parts means silent, maintenance-free operation.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $33.99
Cheaper than about 59% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand name3M
Product colorSilver

Questions about this item

How does the 600 °F upper limit hold up when the tape is left on a hot duct for weeks?

The tape is rated for continuous exposure up to 600 °F and down to -65 °F, so it remains stable through repeated heating cycles.

Does the foil get brittle or the adhesive soften after days of full-temperature operation?

The acrylic adhesive and dead-soft aluminum backing are designed to stay flexible and bonded across the entire -65 °F to 600 °F range.

What surface preparation or primer does the 3M 433 need before I apply it?

Clean the metal or duct surface so it is dry and free of oil; the pressure-sensitive adhesive then bonds without any extra primer.

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