This cleaner worked great on the Teak shelving unit we have in our shower stall. We started getting some mildew/build-up on the legs of the unit, and it was becoming quite unsightly. That's the last thing you want when you take strides in beautifying your home! At first I was going to try sanding the legs and putting some refinishing oil, but read about this cleaner, and I'm glad I did. The cleaner just required a little bit of elbow grease, and the mildew came right off. I'm not sure how this would do on more permanent damage to the wood, but I can see this being a great maintenance, preventative treatment to keep Teak furniture in tip-top shape!