Aquasil - Putty Soft Regular Set - Standard PackAquasil Soft Putty (Regular Set) includes: 1 Base, 450ml, 1 Catalyst, 450ml, 2 Putty Scoops. Aquasil Soft Putty is a very high viscosity impression material with optimum flexibility for easy removal from undercuts. It is for use as a tray material for the double mix technique or as primary impression material for two step putty wash technique.