LiWa Iso® is a liquid insulating agent based on 2-butanone, which is used to insulate plaster models against the light-curing modeling resin LiWa®. LiWa Iso® consists of two liquids, Step I and Step II, which are applied to the model one after the other. LiWa Iso Step I penetrates into the plaster, and LiWa Iso Step II covers and seals the plaster surface. After curing, this prevents the LiWa® resin from sticking to the model. LiWa Iso® is part of an extensive range of plastics in different consistencies, plastic moldings, useful auxiliary materials for many applications and practical sets.