This specification covers an Elastomeric Type of one-component, Hot-Applied, Concrete Joint Sealant resistant to weathering, for use in sealing joints and cracks in Asphalt pavement and Portland cement concrete highway and airfield pavements. The sealant shall be composed of a mixture of materials that will form a resilient and adhesive compound capable of effectively sealing joints and cracks in concrete and asphaltic pavements against the infiltration of moisture and foreign material throughout repeated cycles of expansion and contraction with temperature changes, and that will not, at ambient temperatures, flow from the joint or be picked up by vehicle tires. The material shall be capable of being brought to a uniform pouring consistency suitable for completely filling the joints without inclusion of large air holes or discontinuities and without damage to the material. It shall remain relatively unchanged in application characteristics for at least 6 Hat the recommended pouring temperature in the field.