Sealable adhesive composition, tie pad comprising same, and process for using said pad

Claim 1

AN AUTOADHESIVE AND AUTOSEALING RAILROAD TIE SEAL FOR POSITIONING BETWEEN A TIE PLATE AND TIE COMPRISING A SLAB OF AN ADHESIVE SEALING COMPOSITION CONSISTING ESSENTIALLY OF 45-65 WEIGHT PERCENT ASPHALT HAVING PENETRATION BETWEEN 30 AND 50 AND SOFTENING POINT BETWEEN 100* AND 170*F., 5-25 WEIGHT PERCENT HEAVY NAPHTHENE BASE RESIDUUM OF VISCOSITY ABOUT 40-55 SAYBOLT FUROL SECONDS AT 210*F., 3-12 WEIGHT PERCENT PINE TAR, AND 10-35 WEIGHT PERCENT OF AT LEAST ONE RUBBERY ELASTOMER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, RECLAIMED RUBBER, SYNTHETIC RUBBER AND FACTICE.