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5/8" Closed Cell Backer Rod Sold/Ft

Mfg#: 530BR58
Product#: 530BR58
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KOOL-ROD is a closed cell, polyethylene, flexible, rope-like foam joint backing material. This material is virtually non-absorbent and chemically inert to most solvents. KOOL-ROD will not stain or adhere to sealant materials. It is fully compatible with acrylic, butyl, polyurethane, polysulfide, silicone, and most other cold-applied sealant compounds. KOOL-ROD is specifically designed as a compressible backing material to be used in conjunction with a wide variety of cold-applied joint sealants.


  • For use in expansion or construction joints in concrete and precast concrete walls, floors
  • Easy to handle, smaller packaging/Added contractor convenience
  • Denver foam backer rod
  • Denver foam is chemically inert and will resist oil, gasoline and most solvents
  • Easily compressible, lightweight/Installs quickly, stays in place
  • Forces sealant against joint sidewalls/Provides maximum sidewall adhesion
  • Backing for elastomeric and other applied caulking sealants
  • Controls depth of sealant/Ensures proper joint design ratio
  • Material is odorless and will not stain
  • Closed-cell foam technology/Does not allow air or moisture entrapment
  • Both hot and cold installations can be installed with Denver foam backer rod


  • Type: Closed Cell
  • Color: Dark Gray
  • Standards: ASTM C1330-96/D5249-92
  • Water Absorption: 0.020 g/cc
  • Temperature Rating: -90 TO 210 deg F
  • Joint Width: .5 in
  • Density: 1.50 - 2.00 lb/cu-ft
  • Rod Diameter: .625 in
  • Material: Polyethylene Foam
  • Tensile Strength: 50 psi
  • Usage: For All Types of Construction, Expansion, Isolation, Control and Pavement Joints