The Liquitex PALETTE WETTING SPRAY 237ml Spray Bottle is a fluid acrylic liquid formulated to inhibit the drying of acrylic paints. It allows your palette colors to stay fresher longer, and prevents the paint on the palette from forming a ‘skin.’ This also greatly improves the blendability of your paint. The spray can also be used to thin acrylic paint while still maintaining its integrity. This spray contains anti-microbial properties to inhibit the growth of mold. You can also use this spray to moisten brushes that have started to dry, or add it to colors to aid in the mixing process. It can also be added to older paint that has been sitting for some time to freshen it up and make it useable again.