ASTM International Standard Specification for Elastomeric Seals for Joining Concrete Structures ASTM C1619-20

This specification covers the physical property requirements of elastomeric seals (gaskets) used to seal the joints of precast concrete structures used in gravity and low head pressure applications. The seals shall be classified as: Class A; Class B; Class C; Class D; and Class E. All gaskets shall be extruded or molded in such a manner that any cross-section will be dense, homogeneous, and free of porosity, blisters, pitting, or other imperfections. The gaskets shall be fabricated from an elastomeric material meeting the appropriate classification physical property requirements. The following test methods shall be performed to conform to the specified requirements: tensile strength and elongation; hardness; compression set; accelerated aging; water absorption; ozone resistance; oil immersion testing; and splice strength classification.