Mold-Dough 25P is a two component silicone putty that is easy to use, odorless, and non-toxic. It is ideal for a wide range of molding applications which include: making impressions, hobby/art projects, model-making, special effects, rapid prototyping, mold making, etc.. Mold-Dough is very easy to use just take equal amounts of side "a" and side "b" and knead together until you get a uniformed color then press the object wanted molded into it. Mold-Dough has a 4 minute working time and 30 minute demold time. This is ideal for professional model makers, hobbyists, crafters, and taxidermists. Mold-Dough works excellent with polyurethane, epoxy, and polyester casting resins.