PPG SIK48078/04 ProLuxe Cetol Transparent Satin Door & Window Wood Finish, Natural, QtCetol Door & Window is a specialty transparent finish 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