Open Cell Polyurethane Backer Rod for Hot and Cold Sealant Applications. Open Cell Backer Rod is basically an inert material and
therefore compatible both physically and chemically with virtually all known hot pour and cold applied sealants including silicone
and rubber asphalt. Open Cell Backer Rod will resist oil, gasoline, and most solvents. This material is odorless, will not stain and will not
adversely adhere to sealant and caulking materials.
Open Cell Backer Rod is ideal for non-uniform joint sizes, and is
commonly used in expansion and contraction joints, window glazing,
curtain wall construction partitions, precast assemblies and copings,
parking decks,pool decking, bridge construction, and more.
Installation:
The joint depth must be great enough to allow for the proper installation of the Open Cell Backer Rod and the hot or cold sealant or caulking material. Joint walls must be smooth and even as possible and be free of any loose residues or foreign materials. Joints should also be dry and frost-free. With a
convenient tool or by hand, insert Open Cell Backer Rod into joint at a level recommended by the sealant manufacturer. Cold applied sealants generally recommend that the depth of the joint after the backer rod is installed be one half the width. In hot pour applications, it is generally recommended the depth of the joint be a 1:1 ratio in terms of Backer Rod to sealant.