... air-drying, sand-ability, adhesion and storage stabilit M28# Polyester Resin for Body Filler, Car putty (paste)DESCRIPTION: M28# is an unsaturated ... vehicle putty, machine tool putty, wooden putty.SPECIFICATIONSAppearance Yellow, clear liquidViscosity at 25. DIN CUP 4, seconds 90-110Acid value ... can. It should only be used by trained professionals. Resin for body filler, car putty (paste), poly putty