To be considered truly food safe, a finish must cure properly, which takes much longer than drying. Curing times can vary based on type of finish and your home’s humidity and temperature levels. Around 30 days is considered standard for most food-safe finishes. Is there a glass paint product that is safe for use with food or fluids? I get asked that all the time! I have looked high and low for such glass paints but I have yet to find any. Do not confuse NON-TOXIC with a product being food safe. It's not the same at all.