A composition and article of manufacture comprising a crosslinked polymer and a method of crosslinking a polymer are disclosed. The crosslinked polymer includes a polysiloxane and at least two dimerizable hydroxycinnamic acid crosslinkers. The method includes obtaining a polysiloxane and at least two dimerizable hydroxycinnamic acid crosslinkers, reacting the polysiloxane and the crosslinkers to form a crosslinked polysiloxane, and dimerizing the at least two hydroxycinnamic acid crosslinkers.