This Winsor & Newton Galeria acrylic extender medium helps to get moer out of acrylic colours. An economical medium. Galeria extender medium helps to increase the working volume of acrylic while keeping the original opacity. Colours dry down to the same colour with a matt finish. Acrylic extender is perfect for when a tube is running low and you need to make the last bit of acrylic colour go further. - Brands: Winsor & Newton - Range: Galeria - Acrylic extender medium - 500ml