Endeavour® Priming Oil is a 1 coat only, highly penetrative RAW wood primer specifically developed for EXTERIOR (only) marine timbers. It is formulated to drive pure TUNG OIL, biologically%u2013active clove/eucalyptus extracts and refined Bees Waxes to the extent of penetration. This is to commence the level of effective timber sealing (water/weather-proofing) below the wood%u2019s outer surface.