Item: CETOL NATURAL-QT Manufacturer: IVA316/QT Quart. For Product Data Sheet click here. Cetol Marine Natural Teak provides a flexible and breathable, satin translucent wood finish for use above the waterline on interior and exterior woods. It has a rich golden color that will enhance the natural beauty and grain of wood. It is formulated with the same ease of application and maintenance that all the Cetol products are known for but with Next Wave UV-absorbing technology.