Available in 250ml and 500ml. 
For artists seeking the best longevity for their work - either paintings or exterior murals - first, 1-2 coats of water-based varnish then, when thoroughly dry, a coat of removable solvent based varnish to finish the work. Using a removable varnish allows it to be cleaned off with mineral turpentine which has very little effect on the acrylic painting, so the
painting can be cleaned & re-surfaced without affecting the acrylic paint. It is also called Retouch Varnish.