
Ask Sail: Cetol Skin
I used Sikkens Cetol on the bare wood on my Catalina 30, Morning Dew IV. The can was compromised over the spring, and I put the balance in a 16oz clean glass mayo jar. Last spring when I went to use it, a skin had formed over the top of the liquid, so I just cut the skin off. It is 1/8in thick. In the future, is it still OK to use?












![Ted_Turner_April_1985-Bernard-Gotfryd-2048x Photo from Library of Congress, Prints & Photographs Division, photograph by Bernard Gotfryd, [Reproduction number e.g., LC-USZ62-12345]](https://s3.amazonaws.com/media.sailmagazine.com/wp-content/uploads/2026/05/06145433/Ted_Turner_April_1985-Bernard-Gotfryd-2048x.jpg?w=1024)



