Specifications include, but are not limited to: Crack sealant shall be a modified asphalt-fiber compound designed specifically for improving the strength and performance of the parent asphalt sealant. 1. Asphalt binder shall consist of a blend of neat asphalt binder, chemically modified crumb rubber (CMCR), and a polymer package, all of which meet the following specifications: a. Bind shall meet PG 64-28E requirements after modification including: i. PG grade requirements of AASHTO M320 ii. Requirements of AASHTO TP70/MP19 b. Modification, at a minimum, shall consist of 7% crumb rubber, and the maximum particle size for the recycled tire rubber shall be 80 mesh (#80 sieve). c. The asphalt supplier shall provide testing for both the neat and modified asphalt binders d. See below for typical modified test results for 64-28E with crumb rubber: i. DSR Original: kPa >1.00 @ 64°C. Fail temp = 76+°C ii. DSR RTFO: kPa >2.20 @ 64C°. Fail temp = 76+°C iii. MSCR: (a) JNR (MSCR unit of measure): 3.2 E <0.5% @ 64°C (b) R3200 (Average % Recovery): >70% iv. DSR PAV: kPa <6000 @ 64°C v. BBR: Stiffness <300 @ -18°C. M-Value >0.300 @ -18°C 2. Fiber reinforcing materials shall be short-length polyester fibers having the following properties: Length* Elongation at Break (ASTM D2256-90) Melting Point (ASTM D3418-82) Crimps/Inch (ASTM D3937-90) Cross Section Denier (ASTM D1577-90) Tensile Strength (ASTM D2256-90) Diameter Specific Gravity (ASTM D792-91) 0.25 in. ± 0.02 in. 35% ± 3% >475°F (246°C) None Round 4.5 nominal dpf >70,000psi 0.0008in** 1.32 to 1.40 * At temperatures ranging from ambient to maximum finished product mix temperature ** Subject to normal variations 3. Modifying compound: The modified asphalt-fiber compound shall be mixed at a rate of 8% fiber weight to weight of asphalt cement. This compound having the same chemical base provides compatibility and exhibits excellent bond strengths. The fiber functions to re-distribute high stress and strain concentrations that are imposed on the sealant by thermal sources, traffic loading, etc.