East coast powder heroin I can only say is water soluble. And can be plugged. It dissolves In cold water completely with no trouble at all..I can't speak for tar....just plug what u we're going to put in ur veins, maybe side a bit more water. When heroin was an epidemic in my suburban town 10yrs ago, they found tampons In the boys locker room with heroin on it. Apparently kids were dipping heroin in tampons and plugging that way...which made a bit laugh in the dope scene from illiterate. Immature,and narrow minded 17yr old dope feigns such as myself back then in 2003,2004