JOINT FILLER WITH A PURPOSE — This sika foam backer rod partially fills joints and cracks due to concrete expansion, and to enable flexibility in the space before applying sealant INCREASE EFFICIENCY — Use the Sika Backer Rod to prevent 3-point sealant adhesion and control its depth for easier adjustment and more efficient use of sealant INCREASE EFFICIENCY — Use the Sika Backer Rod to prevent 3-point sealant adhesion and control its depth for easier adjustment and more efficient use of sealant INCREASE EFFICIENCY — Use the Sika Backer Rod to prevent 3-point sealant adhesion and control its depth for easier adjustment and more efficient use of sealant EASY-TO-USE — Clean the area and insert the backer rod firmly and uniformly into the joint or gap. Apply suitable sealant fully over the backer rod and smooth it with a tool for a uniform finish