For mixing, we suggest approximately 1 part water to 2 parts plaster, however this will vary with temperature of water used and prevailing weather conditions.
Never use bare hands to mix or stir plaster.
Water should always be added to the mixing tray first then sprinkle or sift plaster into the water in small quantities and gently mix with spatula. Tap sides to vibrate and release air bubbles. When mixture is a smooth, even consistency and a uniform light grey colour it is ready to pour into mould.