Cost-effective, premixed, tongue and void filler. It requires no setup time and has no messy cleanup. After a lower impression is made, the tongue area is filled with Wonderfill, the plaster/stone is poured and sets, and then is removed for perfectly clean model. As a void filler, Wonderfill fills bubbles, air pockets, missing teeth, and undercuts resulting in better fitting appliances and bleaching trays.