A hard two-part semi-gloss poly-urethane undercoat. Provides an extremely smooth, pinhole-free surface prior to topcoating with any Epifanes high gloss poly-urethane. Good flowing properties, very quick drying, medium filling and easy sanding. Mixing ratio by weight: 4 parts base component A with 1 part curing agent B. (4 :1). Stir well and allow to activate for 15 minutes before use (at 70°F./20°C.).