Teak oil may contain linseed, rosewood or tung oil and a variety of other ingredients. Some teak oils may contain UV light inhibitors for sun protection or mildew inhibitors. The oil is not derived from the teak tree, but is often applied to teak wood as a clear, outdoor finish.
Since teak oil penetrates into the wood, it does not crack or peel. Scratches in the finish are quickly eliminated by re-oiling the area.
To keep teak, mahogany, rosewood and other dense woods appearing like-new, applications should be applied once or twice each year, especially if the wood is fully exposed to the elements. When left untreated for long periods, untreated woods may weather to an ash gray or black.
Once the wood is cleaned thoroughly, teak oils are simple to apply with a brush or rag. Each coat should be allowed to soak into the wood for a few minutes, and the excess should be wiped off.
Homemade solutions offering the same protection as teak oil may be created by mixing each of the following with 1 gallon of warm water: 1 cup each of ammonia and laundry detergent, 1 cup each of chlorine bleach and laundry detergent or 1 cup of vinegar.