1. Crumb Rubber Crack Sealant will be composed of a mixture of asphalt and crumb rubber blended together by the manufacturer to produce a homogeneous mixture when melted, the sealer does not separate or settle and uniform consistency suitable for filling joints and cracks without inclusion of large air holes or discontinuities. A. The crack sealant must meet the requirements of ASTM D 6690, Type I Modified with the following physical property requirements: (1) Recycled rubber, mass, ≥ 18% of asphaltic components, minimum…… 18 (2) Cone Penetration, 25°C (77°F), maximum............................................. 90 (3) Bond Test, 50% extension, @-18°C (0°F) .............................. Pass 5 cycles (4) Flow, 60°C (140°F), mm, maximum.......................................................... 5 (5) Resilience, 25°C (77°F), minimum...................................................... ≥ 40% (6) Softening Point, ≥ 82°C (180°F), minimum.............................................
