Watco Teak Oil is not Teak Oil!
I just re-sealed my teak patio furniture with Watco Teak Oil. I did some reading on the rustoleum website afterwards to learn that it's actually linseed oil + resins/chemicals. I feel completely duped. It costs quite a bit more than other sealers, I spent $38 (gallon), so figured it was real teak oil.
It's in the Material Data Safety Sheet:
Skip to the "New Jersey Right-to-Know" section where they list the top five ingredients as Raw Linseed Oil, Resin, Zinc Borate
Aside from the blatant false advertising, the table turned out pretty good. Will have to see how it holds up over time. Next time I'll just get a premium deck sealer since it seems to all be the same stuff.