Preserva Wood Oil-Based Penetrating Stain and Sealer is ideal for beautifying and protecting exterior wood surfaces such as fences, decks and unpainted wood siding. This oil based stain penetrates deeply into your wood, giving superior protection, especially in harsh environments that cycle between sun and snow. The formula's organic oils protect the wood from water damage, while natural reflective pigments provide superior protection against UV damage. Pacific redwood has more pigment for better protection, while showing as a pale red color on wood.