A water-based exterior grade varnish with powerful UV filters to protect your timber. We were very impressed with the quick-drying clear durable coating. Available in satin and matt [labelled dead flat]. For a matt finish, Polyvine state that 3 coats of the satin should be applied first, and sealed with a final coat of matt. However, we think that for block colours where loss of definition is not a problem, 4 coats of the matt will achieve a flatter finish, and should be OK for short-term use externally [less than 1 week]. As always we recommend testing first. Contains UV filters. Covers 15-20 m² per litre.