OnlineTeakFurniture Semco 2 Two Part Cleaner (Pint) TWO PART CLEANER is the simplest and most thorough way to clean teak. It deep cleans teak without harsh scrubbing to remove graying, fish blood, fuel stains and teak oils. PART 1 dissolves dirt and old sealers. PART 2 brightens teak and neutralizes Part 1.