Half-Time Putty Paks, 2:45 Set Time Putty/Heavy, Super Fast Set, 12 - 18mL Paks (Base & Catalyst). Heavy viscosity super-hydrophilic VPS impression material. Wild Berry scent, Deep purple color, pairs well as a tray material with Lite or Extra Lite wash material. Putty paks come in individually wrapped quadrant doses which are easy to use, store and dispense. Simply peel back the lid, fold the pak in half squeezing base and catalyst together and begin mixing. 12 - 18 ml base & catalyst paks