Interior-formula, oil-based primer takes approximately one to four hours of drying time before applying paint. Exterior-formula, oil-based primer requires up to 48 hours of drying time before painting. A latex bonding primer, which is formulated for paneling, tile, glass or metal, needs 48 hours of drying time to cure completely.
The drying time for a primer varies depending on the manufacturer, room temperature, interior or exterior application and the type of primer. Check the manufacturer's product specifications, which are typically printed on the label, for exact drying times.
The use of primer before painting improves the paint's ability to adhere to the surface. It results in an even paint finish that remains attractive and durable.