For a sharper, more visible brush stroke, add Amsterdam thickening medium to your paint. Create a luscious, thick consistency by adding just a small amount of this medium to your Amsterdam acrylic colors. This medium does not affect the color intensity or opacity of the paint since you only need a small amount. How to use: Use a painting knife to thoroughly mix a small amount of the thickening medium with your paint. After this, you can paint with a brush. Be careful not to use too much of the thickening medium, this will result in rubber or gum-like paint that is unusable. Amsterdam thickening medium Add to acrylic paint in very small quantities to increase viscosity Reduces gloss Only suitable for use with acrylic colors Clean utensils with water Apply at temperatures above 10° C and store free of frost