Live rosin sounds a lot like live resin, doesn’t it? Live resin refers to concentrates made using fresh frozen buds and a solvent-based extraction process. Most live resin makers use butane hash oil (BHO) production to create flavorful, pungent, and potent live resin extract. Live rosin, on the other hand, doesn’t use any solvents, but uses the same starting material, hence, the “live” designation.