*bituminate*

v. t. [ imp. & p. p. Bituminated; p. pr. & vb. n. Bituminating. ] [ L. bituminatus, p. p. of bituminare to bituminate. See Bitumen. ] To treat or impregnate with bitumen; to cement with bitumen. “Bituminated walls of Babylon.” Feltham. [ 1913 Webster ]