Diotrol Imprenol Fichte Natur is a temporary, solvent-based transport protection based on natural oil. For timber with a hydrophobic effect and film preservation against the growth of blue stain and black fungus. The mineral UV blocker prevents the destruction of the wood substance by UV radiation. Diotrol Imprenol Natural Spruce must be applied on all sides. End-grain wood surfaces should be soaked particularly thoroughly and then sealed with Diotrol matt oil. This impregnation does not provide long-term protection against the effects of the weather. Protective coating required.