The disclosure relates to a polymer composition comprising a styrenic block copolymer, a tackifier and at least an additive. The styrenic block copolymer is fully dissolved in a solvent system containing a first solvent and a decarboxylated rosin as a co-solvent in a ratio of 20:80 to 80:20. The styrenic block copolymer includes unhydrogenated styrenic block copolymers, partially hydrogenated styrenic block copolymer, fully hydrogenated styrenic block copolymer, and mixtures thereof. The polymer composition exhibits a higher softening point and reduced vertical slump at room temperature after 6 to 24 hours. The polymer composition is suitable for use in adhesives, sealants, and coating applications.