Soluble Varnish Matt
Specially developed for the protection of acrylic works from environmental pollutants which can cause surface degradation. Sealing the surface with varnish provides a barrier film which can be cleaned or removed, but leaves the paint itself unblemished.
 
Detail product specification, please visit Daler-Rowney Wesite :
http://www.daler-rowney.com/en/content/acrylic-mediums