LeFranc Mixtion Oil Size is suitable for interior and exterior work. The Quick Dry reaches tack in 3-5 hours depending on film thickness, temperature and humidity. After reaching the proper gilding tack, it will remain open for gilding with genuine gold leaf for 4-6 hours. The open time for gilding with metal leaf is shorter, since metal leaf is heavier. Allow the gilded surface to cure one week before sealing or glazing.