and here's a great material for making spacers and blocking out undercuts!
A classic example of the TAK systems nickname (The Swiss Army Knife of the Dental Office), Model Bloc is always there, always ready, and 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. Model Bloc 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. Model Bloc belongs on the shelf of every dental office.