Add 1 part water to 5 - 5 1/2 parts QUIKRETE Quick-Setting Cement by volume. Reducing the water will hasten the set time. When using Acrylic Fortifier, replace 1/2 gal (1.9 L) of mixing water with Acrylic Fortifier per 50 lb (22.7 kg) bag. Add only enough water to get the proper consistency.