Railroad rail track pad composition and railroad rail track pad

A railroad rail track pad composition comprising an ethylene/α-olefin/non-conjugated polyene random copolymer (A), clay (B), and a sulfur atom-containing silane coupling agent (C), wherein

• the ethylene/α-olefin/non-conjugated polyene random copolymer (A) is:
• a copolymer comprising structural units derived from ethylene [a], an α-olefin [b] having 3 to 20 carbon atoms, a non-conjugated polyene [c-1] comprising in a molecule only one partial structure represented by the following structural formula (I) or (II):
• wherein (I) is a partial structure of a cyclic olefin,
• and a non-conjugated polyene [c-2] comprising in a molecule a total of two or more partial structures selected from the group consisting of structural formulas (I) and (II), and satisfying conditions of the following (1) to (6):
• (1) the structural unit derived from the α-olefin [b] having 3 to 20 carbon atoms is present at 10 to 50 mole % in 100 mole % of all structural units,
• (2) a sum of a mole % of the structural unit derived from the non-conjugated polyene [c-1] and a mole % of the structural unit derived from the non-conjugated polyene [c-2] is 1.0 to 6.0 mole %,
• (3) a ratio of the mole % of the structural unit derived from the non-conjugated polyene [c-1] to the mole % of the structural unit derived from the non-conjugated polyene [c-2] ([c-1]/[c-2]) is 75/25 to 99.5/0.5,
• (4) Moony viscosity measured at 100° C. [ML1+4 (100° C.)] is 10 to 90,
• (5) an apparent iodine value of the structural unit derived from the non-conjugated polyene [c-2] is 0.1 to 3.0 g/100 g,
• (6) the following formula (i) is satisfied:
• 50>activation energy of the flow(Ea)[kJ/mol]>35 (i),
• wherein the clay (B) is surface-treated with a silane coupling agent, and
• wherein a compression set when the composition is formed into a crosslinked and formed product is 10% or less.