Tips. Always prime a bare sash with an oil-based primer prior to glazing. ... Wait until the glazing putty has formed a skin (3-4 days for Type-M putty or 2-3 weeks for Dual Glaze putty) before you attempt to paint. Do not prime the glazing putty after you have glazed your window.

Do you need to prime putty before painting?

To be able to paint properly, the wood must be dry, and the glass and putty must be intact. ... Prime the window frame with oil and paint. Wait until the primer has dried before starting to apply the putty with a putty knife. DO NOT USE A HEAT GUN!

Do you have to paint glazing putty?

You can leave putty unpainted. However, since you might have to repaint the windows, then you may also have to paint the glazing putty. First, sand the wooden frame, prime it and then start painting the windows.