... concrete structures , basement leak sealing cracksealing etc.Shenglong injection packer for injection machine spare parts is uesd with the Shenglong ... section, then move to next packer for injection.5.Packer Removing OperationRemove and break the packer by using vise pliers or ... ends or cracks with cross, should drill holes again, re-grouting .b. To fill cracks with polyurethane, should grout again ...