PE BACKER RODS
Zwaluw Backer Rod consists of polyurethane foam (open cell) and polyethylene foam (closed cell) in various diameters from from 8mm to 50 mm.
To be used as back-filling material in joints to create the right joint dimensions for the sealant to be applied.
Polyethylene foam to be used for joints which are exposed to mechanical (walking joints) or water pressure (joints under water). The polyurethane foam is suitable for non-loaded joints. For further information consult data sheet 7.22.