Pebeo Artist Acrylics varnishes improve the age-resistance qualities of acrylic colours, while unifying sheen and increasing the depth of colour. When colour is applied thickly, wait 1 to 2 weeks before varnishing work. The Artist Acrylics Gloss Varnish is a water-based, non-yellowing and particularly transparent varnish. It offers a perfectly tight, flexible and indelible film, with a very glossy finish. May be diluted with water.