A biocompatible and biodegradable construct comprising a base expandable member and an outer coating comprising poly(glycerol sebacate) (PGS), the base expandable member comprising acellular extracellular matrix (ECM) derived from a mammalian tissue source, the acellular ECM exhibiting a flexible, porous, expandable structure, which is adapted to expand upon exposure to and absorption of a bodily fluid, wherein the construct seals a perivalvular leak when disposed proximate thereto.