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PENOSIL Premium Backer Rod PE 450 is a closed cell flexible polyethylene foam backer rod for filling joints and gaps before sealing. Minimises the amount of sealant used, ensures an optimum sealant shape and prevents the joint's failure. Compatible with polyurethane, hybrid polymer, silicone and other most common sealants.
Choose the backer rod size according to the width and depth of the joint. The backer rod must be approx. 25% larger in diameter than the joint width.
Install backer rod using a blunt tool or a plain roller.
Lightly compress the backer rod into the joint. Set the rod to the depth and ensure it forms a tight seal against the joint edge.
Avoid overlapping the backer rod edges; press the ends tightly together.