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3M aluminum foil tape 3340, 2.5" x 50 yd, 4.0 mil

3M ★ 4.4/5 · ItemOracle Score Budget

$39 USD
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3M Aluminum Foil Tape 3340, 2.5" x 50 yd, 4.0 mil, Silver, HVAC, Sealing and Patching Hot and Cold Air Ducts, Fiberglass Duct Board, Insulation, Metal Repair

Aluminum foil tape with a pressure-sensitive acrylic adhesive, designed for vapor sealing and duct work from -40F to 300F. Noted for strong adhesion and ease of use, with a coated liner for prep

Highlights

  • vapor seal capability
  • wide operating temperature
  • easy-to-use liner

Pros

  • foil backing with acrylic adhesive
  • vapor seal for duct closure
  • wide temperature range
  • easy releasing liner
  • moisture and dust barrier

Cons

  • some reviewers find thickness too thick

Best For

  • HVAC duct sealing
  • dryer vent pipes
  • fiberglass duct board repairs
  • insulation patching
  • heat and cold air duct sealing
  • RV A/C unit sealing

Features

  • 2.0 mil aluminum foil backing with 4.0 mil total thickness and pressure sensitive acrylic adhesive for vapor seal
  • Operates over -40F to 300F (-40C to 149C) for hot and cold HVAC conditions
  • Poly coated Kraft paper liner protects adhesive for easy handling
  • Foil backing provides moisture, dust, and chemical resistance for durability
  • Suitable for HVAC duct closure and vapor sealing on reinforced fiberglass duct board

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