All floor joints (except armoured joints) shall be sealed and filled with appropriate specified material, specified and applied according to Suppliers recommendations. Both sealers and fillers should only be installed after the slab has had a chance to shrink as much as possible, must bond to the concrete, be impermeable, and where applicable be able to handle the expansion and contraction. Bond breaker or backer rods shall be used where necessary to prevent the sealer from sagging into the joint and from adhering to the bottom of the joint.