Two years ago, I tried a product called Teak Guard. It looked great until winter. Much of it peeled.
Now, I'm looking at sanding it all over again because it is so difficult to remove. The standard removal products don't work. I just let it go for a season hopping the finish would fall off.
I don't know of the product that you have discovered, but I would recommend against any product that has not stood the test of time.
Although I don't like the look of Cetol, I'll probably use that next time.