Interlux Sikkens Cetol Marine Natural Teak Finish Over time, all the potential environmental hazards, such as saltwater, wind, and scorching sun rays, can have their way with teak furniture and decking. Protect your investment with Sikkens Cetol Marine Natural Teak Finish. Cetol Marines Natural Teak formula actually enhances the natural wood grain, while its specially formulated UV- absorbing technology provides added protection with a durable, translucent, and protective wood finish. Sikkens Ce