KeyVest is a universal dental investment that is compatible with all dental alloys and pressable ceramic systems. Its fine, phosphate-bonded formula gives you the accuracy and consistency you need for your lab to keep up with modern standards. KeyVest s smooth consistency and long working time allows for multiple rings to be poured at once, without forming bubbles. You ll never have to worry about time constraints, since rings can be placed in an autoclave or furnace any time after bench-set without fear of cracking.