Teakdecking Systems ECO-100 Teak Cleaner Powder has been formulated to be 100% environmentally friendly, it contains no harsh acids, caustic sodas or phosphates. Representing the most advanced truly “green” teak cleaner in the marine industry. The Teak Cleaner Powder is a high performance, concentrated cleaner for teak and composite decks. Helping to clean and brighten your deck without removing the soft fibres of your teak. It mixes easily with water and has been designed to not harm your teak, caulking, hardware or paint.