and here's a great material for making spacers and blocking out undercuts!
Model Bloc is simply a classic example of TAK systems nickname (The Swiss Army Knife of the Dental Office.) It's always there, always ready, always does the job just right, fast and easy. Block out under cuts and make spacers on models that need vacuum forming or for custom trays. Build up the walls of impressions that have voids. Quickly box & bead an impression, build up the palate area of a stock tray when the patient has a deep vault. Use it on the periphery of stock trays to reduce patient discomfort. It never hardens or gets crumbly. It does not need to be heated. It leaves no residue on your hands or fingers and it's odorless. Many times the same piece can be used over again a hundred times. It belongs on the shelf of every dental office.