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Cloth & Duct Tapes

PC 721

PC 721 Extreme Hold, Co-Extruded Cloth Duct Tape

Extreme hold cloth duct tape for HVAC applications to hold, seal and seam sheet metal, as well as for heavy duty industrial applications like holding, bundling, splicing, protecting and packaging. PC 721 is designed for demanding applications that require excellent conformability, tack and holding power, and its co-extruded construction means it will not delaminate.

Features & Benefits

  • Extreme hold duct tape
  • Excellent tack, conformability and holding power
  • Easy to unwind and tear
  • Will not twist or curl during application
  • Waterproof backing

Related Products

PC 621

Heavy duty cloth duct tape for demanding HVAC and industrial applications.

PC 657

Heavy duty, co-extruded cloth duct tape for applications that demand excellent tack, holding power, durability and temperature resistance.

Typical Applications

  • For demanding HVAC applications to hold, seal and seam sheet metal
  • Can also be used for heavy duty industrial applications like holding, bundling, splicing, protecting and packaging



  • Backing: Polyethylene film with a cloth carrier
  • Adhesive: Natural rubber adhesive
  • Liner: NA

Properties & Technical Data

Property Standard Metric
Adhesion to Stainless Steel 60 oz/in width 6.57 N/10 mm
Elongation 24% 24%
Service Temperature Range 50 F to 200 F 10 C to 93 C
Tensile 30 lbs/in width 52.5 N/10 mm
Thickness 11.5 mils 0.29 mm

Physical and performance characteristics shown above are obtained from tests recommended by PSTC, ASTM, government agencies or Shurtape Technologies, LLC, Quality Assurance and Technical Service departments and do not represent a guarantee of product performance. Individual rolls may vary slightly from these averages. The user should determine whether the product is fit for a particular purpose and is suitable for the user’s method of application before use.

Applicable Standards

Tested in accordance with UL 723, FSI 5/SDI 5

Sizes & Colors

Colors Available:

Silver (SIL) Silver (SIL)

Lengths Available: 55 m

Widths Available: 48 mm

Standard Core Size: 3 in

Sizes and colors disclaimer: Lead times may apply. Please contact Shurtape customer service for information related to stock and non-stock sizes and colors.

Storage & Usage Conditions

Tape should be stored in its original packaging in a cool, dry area away from direct sunlight and should be used within 12 months of date of shipment. Surfaces to which tape is applied should be clean, dry and free of grease, oil or other contaminants.