Cetol on teak
We do not recommend Cetol for teak decks. We have found it is fine for trim, but attacks the caulking over time. You best choice would be to stick with a "traditional" teak oil type sealer. The best way to get a long lasting finish on your teak it to clean it and seal it on separate days. After cleaning the teak, (and we recommend a one part teak cleaner as the 2-part cleaners, although easy are very rough on the teak) allow it to thoroughly dry, at least 24 hours, and then apply 2 or more thin coats of oil.