Hardwood Tannin & Oil Remover from Johnstone's Professional is a powerful, fast, high strength liquid that draws out oils from weathered hardwood and softwood timber. The water based solution removes natural tannins from new hardwood timbers such as Merbau, and Australian eucalypt timber species. Combined with Johnstone’s Professional Deck & Timber Cleaner, it removes any tannin residue, enabling immediate coating of hardwood