Add a rough texture to your work with the Amsterdam Pumice Medium. This pumice has a gray tone and can be used directly from the jar on its own painted over or mixed with paint. Since the pumice medium is coloured, mixing it with paint affects the colour. Amsterdam pumice medium is available in fine, middle and coarse textures. 
 
The grainy texture significantly increases colour deposit. Pumice mediums are even used in the building of scale models to recreate certain textures (such as concrete, stone and gravel).
 
Can be applied directly or mixed with acrylic paint.
Can be painted over with acrylic paint.
Can be applied in thick layers.
 Waterproof when dry.
Clean utensils with water.
Apply at temperatures above 10° C and store free of frost.