McMaster-Carr logo
    Filter by
    Color
    Diameter
    Attribute Image
    Foam Cell Type
    Maximum Temperature
    For Maximum Joint Width
    Cell Type
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Industrial Info Snippet
    Minimum Temperature
    DFARS Specialty Metals
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    3 Products
    About Sealants
    industrial info icon

    Select a sealant that can stretch, contract, and expand enough for your joints.

    Backer Rods

    Image of ProductInUse. Front orientation. Backer Rods.
    Image of Product. Front orientation. Backer Rods.
    Image of Attribute. Front orientation. Contains Annotated, Border.
    Provide support for sealants in gaps—insert these backer rods into gaps and fill in with sealant.
    Open-Cell Foam—Open-cell backer rods are the most compressible and maintain their shape better than open/closed ones. They allow moisture to be absorbed. Although they withstand environments up to 500° F, they shouldn’t be used with hot-pour sealants, which can seep through the large cell size and damage the underlying surface.
    For Max.
    Joint Wd.
    Dia.
    Lg.,
    yd.
    Min. Temp.,
    ° F
    Max. Temp.,
    ° F
    Color
    Each
    Open-Cell Polyurethane Foam
    1/4"3/8"250-60500Black77605T111000000
    1/2"5/8"166-60500Black77605T11200000
    3/4"7/8"175-60500Black77605T113000000
     
    back to top