Specifications include, but are not limited to: Asphaltic Plug, Matrix 501 Mastic, PN 33345-37. COMPONENTS: The Matrix 501 Asphaltic Plug Bridge Joint System is composed of Matrix 501 Mastic, Matrix 501 Adhesive, Matrix D aggregate, backer rod, bridging plates and locating pins. Details and specifications for these components follow. 1.MATRIX 501 MASTIC, Part No. 33345. Matrix 501 Mastic is a single component blend of a specially formulated polymer modified asphalt binder and aggregate mix. The mastic is designed to workable at the heated application tempers yet be resistant to segregated in the joint and binder flow out on crowned bridges or super elevations. The properly applied mastic requires no compaction and will form a bond, flexible, extensible, compressible and traffic joint system.