The ASTM D4811-2016 standard specification applies to non-vulcanized rubber sheets made of ethylene propylene diene diene rubber (EPDM) or polychloroprene (CR) for use on weather-exposed waterproof roofs. These rubber sheets need to be gluing to facilitate waterproof splicing and repair. The specification covers pre- and post-vulcanization performance requirements for rubber sheets, including thickness, tensile strength, elongation, weathering resistance, etc. However, design criteria such as fire resistance, joint strength, and material compatibility for roofing systems are beyond the scope of this specification. This standard provides performance requirements and test methods for ensuring that waterproof rubber sheets are adapted to their application environment.