Design Polymerics DP 240 / DP 340 Foil Mastic Tape

Design Polymerics DP 240 / DP 340 Foil Mastic Tape

A foil backed butyl mastic rolled sealant tape that is fully cured, high pressure/high velocity rated for use on commercial and residential supply and return air ducts. DP Foil Mastic Tape is pressure sensitive and requires no cure time before pressure testing.

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Product Description


  • Recommended for sealing joints, seams, and duct wall penetrations.
  • Recommended for sealing connections on flexible duct or fiberglass ductboard.
  • Recommended up to 15 inches water column pressure.
  • Recommended for applications that require no cure time. 

Features & Benefits

  • LEED Qualified
  • ZERO VOC’s
  • UL Classified
  • Instant Adhesion
  • 2″ and 3″ Widths
  • 18 Mil Total Thickness
  • 100% Solids, No Cure Time
  • and more!

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General Insulation Company Inc. is an insulation supplier / insulation distributor that stocks and fabricates a wide variety of industrial and commercial air barrier, vapor barrier, moisture and water barrier products for the construction market.

Design Polymerics DP 240/340 Technical Data Sheet

Design Polymerics DP 240/340 Safety Data Sheet

LEED Credits