The invention provides a tag for rubber products. The tag comprises a film base material, a base coat and pressure-sensitive adhesive. The base coat is provided with a first surface and a second surface, the first surface of the base coat is in contact with the film base material, and the base coat comprises, by weight, from 10% to 80% of epoxy-modified alkylene rubber, from 10% to 80% of reactive polyamide resin and from 0% to 50% of epoxy resin on the basis of the total weight of 100% of the base coat; the pressure-sensitive adhesive is in contact with the second surface of the base coat. The invention further provides a base coat composition.