Backer Rod - Soft 4in. - 48 LF
4in. Soft Foam Backer Rod - 48 LF

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Item #: SFT-BROD-4-48
Availability: In Stock
Usually ships In 1-3 Business Days
  • 4in. Diameter
  • 48 Linear Feet per box
  • Shipped in 6' Lengths - 8 Pieces/Box
    • Tensile Strength: 50 PSI
    • Size to Joint width: 2-1/2in. to 3in.
    • Meets or exceeds the requirements of ASTM-C-1330 Type B.
    • Available Stock Sizes: 3/8in., 5/8in., 7/8in., 1-1/8in., 1 1/2in., 2in., 2 1/2in., 3in., 4in.
    • Standard color: Grey
    • Sold by the box

    Note: Backer Rod is inexpensive, but can be expensive to ship. This is because of the large volume of space it takes in boxes. Dimensional weight applies. More information is here: UPS Dimensional Weight and Oversized Packages

    ( Be sure to call us about bulk shipping rates)

    Price: $168.75


      Soft Backer Rod is particularly well suited for specialty applications where standard backer rods are not appropriate. Soft Backer Rod is ideal in irregular joint applications where self-leveling, flowable sealants are employed. Soft Backer Rod is also recommended for use with sealants where bubbling concerns arecritical. It is compatible with all known cold applied sealants including butyl, polysulfide, acrylic, polyurethane, and silicone. Soft Backer Rod may be used in place of most standard backer rod applications or as a temporary joint seal.


      Joint or opening must be clean, dry, and free of obstructions. Using the “Size-to-Joint Width” table,select proper rod diameter and cut to length or use

      directly from spool. With a blunt instrument or roller, uniformly install rod at the level recommended by the sealant manufacturer, specifier, or architect

      involved. Generally, the depth of the joint after the backer rod is installed is one half the width. Very large or very small joints vary in terms of this depth

      to width ratio. Avoid puncturing, stretching, or over compression.

      Click link below for Product Data

      Soft Backer Rod Product Data