CORKJOINT® offers a range of Copper Waterstops designed and manufactured from phosphorus non-arsenical copper alloy at 1.0mm thick to AS1566 or BS1172 international standards and specifications. Sure-Stop® Copper Waterstops are predominantly used in water retaining structures such as dams, which receive very high hydrostatic heads of water pressure against the joint. They provide a very high grade of performance due to their ability of providing strength, durability and integrity to the joint and structure.