CCW MiraSTOP Waterstop is a self-adhering, flexible, coiled strip of butyl rubber polymers and expandable bentonite clay waterproofing joint compound. It is designed for use in non-moving joints to create watertight concrete joints and is ideal for many types of cast-in-place and precast below-grade concrete applications, such as: construction joints in foundation slabs and below-grade walls, precast concrete wall panel systems, septic tanks, sanitary and storm sewer manholes, pipes, utility and burial vaults, wet walls, box culverts and portable water tanks. CCW MiraSTOP prevents infiltration of below-grade moisture in nonmoving joints. When water comes in contact with CCW MiraSTOP it swells to form a strong compression seal. It should be used in conjunction with CCW waterproofing membranes such as CCW MiraDRI 860/861 and CCW MiraCLAY.