Professional-grade soft bi-cellular polyethylene backer rod designed for filling narrow expansion joints, control joints, and gaps prior to sealant application in concrete, masonry, and construction projects. Manufactured by NOMACO with SOF construction in soft formulation, 3/8-inch diameter, and extra-long 3600-foot length for maximum coverage on high-volume commercial and residential applications. This soft, flexible bi-cellular polyethylene foam rod provides proper backing for sealants in narrow joints, compresses easily, controls joint depth, prevents three-sided adhesion, and reduces sealant consumption while ensuring optimal joint performance.
SAFETY
FEATURES AND BENEFITS
Bi-Cellular Polyethylene Construction: Soft formulation with extra-flexible foam compresses easily into narrow irregular joints and tight spaces
3/8-Inch Diameter: Ideal for narrow expansion joints and control joints in concrete and masonry work
3600-Foot Length: Maximum-coverage roll for large projects, dramatically reducing material changes and downtime
SOF Backer Rod Design: Soft closed-cell polyethylene foam stays compressed in narrow joints and maintains proper backing
Twin Gray Color: Professional neutral appearance suitable for visible joints and installations
Prevents Three-Sided Adhesion: Allows sealant to adhere only to joint sides, not bottom, for proper movement
APPLICATIONS
Backing for narrow concrete expansion and control joint sealants
Thin concrete slab joint preparation before caulking
Sidewalk and walkway narrow expansion joint backing
Masonry control joint backer rod installation (narrow joints)
Building perimeter joint sealing preparation
Curtain wall and window/door perimeter joints
Thin joints in parking lots and plaza sealing
Narrow irregular or tight joints requiring soft, compressible backing
High-volume commercial and residential construction joint preparation
SPECIFICATIONS / COMPLICANCE
Diameter: 3/8 inch
Length: 3600 linear feet per roll
Material: Bi-cellular polyethylene (soft backer rod foam, closed-cell formulation)
Color: Twin Gray
Type: Soft backer rod
Manufacturer: NOMACO
Product Type: Bi-cellular polyethylene soft backer rod / backing rod / joint filler
Application: Expansion joint backing, control joint preparation, sealant depth control, construction joint sealing in narrow joints
