ProLuxe Cetol Door & Window Wood Finish. Clear Satin. Formulated to protect exterior wood door and window frames as they expand and contract with fluctuations in temperature. High-solids alkyd-oil formula, three-coat application. High-transparency transoxide pigments amplify depth of color, clarity and substrate protection. Powerful UV absorbers protect color and wood substrate. Water-repellent, more resilient alternative to exterior varnishes and polyurethanes and provides a mildew-resistant finish.