ASTM International Standard Specification for Chlorinated Polyethylene (CPE) Sheeting for Concealed Water-Containment Membrane ASTM D4068-17

This specification covers flexible chlorinated polyethylene sheeting for use in concealed water-containment membranes in applications susceptible to costly secondary damage from leakage and which require very long term reliable performance, for example, fountains, pools, planters, shower and safe pans, and tile tubs. However, this specification does not cover water-containment membranes for use in applications involving exposure to ultraviolet light or direct sunlight. The sheeting shall be manufactured from a compound containing chlorinated polyethylene resin, with the resin being substantially amorphous and made from linear polyethylene. Recycled materials may be used, but must conform to the requirements specified, while the use of water-soluble materials shall be prohibited. Further, the sheeting shall be homogeneous, monolithic, and free of pinholes, particles of foreign matter, undispersed raw materials, blisters, coaters, pimples, pits, crazing, and thin spots, with the sheet edges being straight, parallel, and free of trim material. Tests for tensile strength, tensile stress at elongation, ultimate elongation, tear resistance, volatile loss, microorganism resistance, low-temperature flexibility, chemical resistance, hydrostatic pressure resistance, puncture resistance, bonded seam strength, thickness, pinholes, and shrinkage shall be performed and shall conform to the requirements specified.