McMaster-Carr logo
    Filter by
    Tape Type
    Welding Process
    Industrial Info Compare
    System of Measurement
    Maximum Temperature
    Material
    Adhesive Location
    Center Strip Profile
    Adhesive Type
    Color
    Tape Construction
    Center Strip Material
    Liner Type
    Minimum Temperature
    USMCA Qualifying
    Thickness
    Center Strip Width
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    11 Products

    Ceramic Weld-Backing Tape

    For welding large gaps, these strips form a rigid mold for your weld. They contain spatter and protect your weld from weakening from oxygen, water vapor, and other gases.
    Flat Center Strip
    Image of ProductInUse. Front orientation. Weld-Backing Tape. Ceramic Weld-Backing Tape, Flat Center Strip.
    Ctr.
    Strip
    Overall
    Wd.
    Thk.
    For Max.
    Current, amp
    Wd.
    Lg.,
    ft.
    Material
    Max. Temp.,
    ° F
    Adhesive
    Type
    Welding
    Process
    Pkg.
    Qty.
    Pkg.
    1 1/16"0.32"2401 1/16"2Aluminum
    450AcrylicMIG, TIG50000000000000
    Round Center Strip
    Image of ProductInUse. Front orientation. Weld-Backing Tape. Ceramic Weld-Backing Tape, Round Center Strip.
    Overall
    Ctr. Strip
    Dia.
    For Max.
    Current, amp
    Wd.
    Lg.,
    ft.
    Material
    Max. Temp.,
    ° F
    Adhesive
    Type
    Welding
    Process
    Pkg.
    Qty.
    Pkg.
    5/16"2405/16"2Aluminum
    450AcrylicMIG, TIG50000000000000
    3/8"2405/16"2Aluminum
    450AcrylicMIG, TIG5000000000000
    7/16"2407/16"2Aluminum
    450AcrylicMIG, TIG5000000000000
    Grooved Center Strip
    Image of ProductInUse. Front orientation. Weld-Backing Tape. Ceramic Weld-Backing Tape, Grooved Center Strip.
    Ctr.
    Strip
    Overall
    Groove
    Wd.
    Wd.
    Thk.
    For Max.
    Current, amp
    Wd.
    Lg.,
    ft.
    Material
    Max. Temp.,
    ° F
    Adhesive
    Type
    Welding
    Process
    Pkg.
    Qty.
    Pkg.
    3/16"1"0.32"2401"2Aluminum
    450AcrylicMIG, TIG50000000000000
    5/16"1 1/16"0.32"2401 1/16"2Aluminum
    450AcrylicMIG, TIG5000000000000
    7/16"1"0.32"2401"2Aluminum
    450AcrylicMIG, TIG5000000000000

    Fiberglass Weld-Backing Tape

    Image of ProductInUse. Front orientation. Weld-Backing Tape. Fiberglass Weld-Backing Tape.
    Stick this flexible tape to the back of welding seams to contain spatter and prevent oxygen, water vapor, and other gases from weakening the weld. Also known as back purge tape, it’s used for welding flat sheets, large tanks, and other applications where filling the space behind the seam with purge gas is difficult or expensive. Form the fiberglass spine into a small ridge over the weld joint, then press the adhesive foil down on each side. Compatible with MIG, TIG, and stick welding.
    For 200 amp Maximum Current—Apply tape for 200 amp maximum current to thin welds on aluminum, cast iron, nickel and copper alloys, and steel.
    For 600 amp Maximum Current—Use tape for 600 amp maximum current to shield thick welds on dense metals, such as stainless steel.
    Temp.,
    ° F
    2 1/2" Wide
    4" Wide
    For Max.
    Current, amp
    Lg.,
    ft.
    Thk.
    Material
    Min.
    Max.
    Adhesive
    Type
    Color
    Welding
    Process
    Ctr. Strip
    Wd.
    Each
    Ctr. Strip
    Wd.
    Each
    200820.18"Aluminum
    -40450AcrylicSilverMIG, TIG, Stick1 1/8"000000000000001 1/2"00000000000000
    600410.18"Aluminum
    -40450AcrylicSilverMIG, TIG, Stick1 1/8"0000000000001 1/2"0000000000000
    back to top