Cut the backing rod to length and press it into the expansion joint. Press the rod down to about a 1/2-in. to 3/8-in. below the slab surface. This will let a 1/4-in. to 1/2-in. layer of caulk top ...

Spalled concrete joints are the primary problem for a concrete floor. Though the joint is necessary to control cracking, they ...

Large sections of concrete should have joints running across the full width of the slab, ... Fill the new or existing expansion joints with pre-formed expansion joint strips or foam backer rod.