Foil, Film & Foam Tapes

MB 300CT Metal Building Insulation Seaming Tape

Heavy duty MB 300 offers a three-layer construction of metalized polypropylene film, multi-directional fiberglass reinforcing scrim and bleached kraft backing for a tape solution that's ideal for seaming and sealing White Metalized Polypropylene (WMP-10) insulation backings. MB 300 is mold-resistant and is coated with our high performing cold temperature adhesive to provide flexibility to apply this tape in temperatures ranging from -20 F to 220 F.

Features & Applications

  • Heavy duty metal building insulation tape
  • Seamless match
  • Non-permeable, permanent bond
  • Able to withstand extreme temperature fluctuations
  • Moisture- and mold-resistant
  • Unique three-layer construction: polypropylene film, multi-directional fiberglass reinforcing scrim and bleached kraft
  • Specifications

    Learn more about MB 300 in depth by exploring all of its features and uses. You can also visit to learn more about choosing and using tapes.



    Backing: White metalized polypropylene (WMP-10)

    Adhesive: Cold temperature acrylic

    Liner: NA

    Properties & Technical Data

    Product Nomenclature: MB 300
    Adhesion to Stainless Steel64 oz/in width7.0 N/10 mm
    Service Temperature Range-20 F to 220 F-29 C to 104 C
    Tensile41 lbs/in width71.8 N/10 mm
    Thickness - With Liner12.2 mils0.31 mm
    Thickness - Without Liner8.3 mils0.21 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.


    Sizes & Colors

    Colors Available: White (WHI)

    Lengths Available: 50 yd

    Widths Available: 2.83 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.

    Applicable Standards

    Tested in accordance with UL 723

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    Where to Buy

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