SEALANT COMPOSITION AND PNEUMATIC TIRE

A sealant composition according to an embodiment includes, per 100 parts by mass of a solid rubber component containing a diene rubber, 95 to 150 parts by mass of a hydrocarbon resin, 20 to 100 parts by mass of a liquid plasticizer, and 0.05 to 4.5 parts by mass of an organic peroxide crosslinking agent.