Danish Oil & Tung Oil Finish don’t contain any additives. They are similar, except that Tung Oil Finish is more similar to the finish you will get with Tung Oil where Danish oil will give you more of a Linseed Oil look. They are both different to teak oil in the sense that they contain less solids than teak oil. A higher solid content makes teak oil better suited to outdoor use, and has more sealant properties. You don’t want to apply anything on teak oil whereas you can still do that with the other two.