Agama acrylics color thinner 25ml Acrylic colours can be thinned using water but for optimum performance it is recommended that Agama acrylic thinner is employed, particularly for airbrush application. Agama acrylic colours can be diluted up to 50%. Agama Thinner ensures an even flow and adhesion, slows down the drying process, and prevents clogging of the airbrush.