High-quality product specifically designed to be used with AMMO acrylics for slowing down the drying time. This alteration allows you to blend the colours together more easily and without applying pressure. This also helps with feathering the colours, avoiding tide marks with acrylic washes, and achieving softer colour and tonal gradations. AMMO colours are easy to use: simply add some retarder to your paint mix and enjoy the characteristics of this flexible acrylic product. Compatible with other acrylic brands. Odourless and non-toxic.