Good isolation is fundamental for well fitting prosthetics. Aislar is a formaldehyde-free aqueous solution based on alginate used to isolate gypsum surfaces from prosthetic acrylics and composites. The isolation meets all essential demands such as quick drying time, smooth surface and complete separation. Aislar features these properties for both heat and coldcuring prosthetic acrylics. Advantages ■ Dentures with maximum fitting accuracy. ■ Smooth surfaces. ■ Trimming reduced to a minimum. ■ Short drying time, no layers formed. ■ Optimal separation. ■ Formaldehyde free.