Instead of using a suspension of wood byproducts in a binder, wood putty is made with plastic-based and oil-based compounds including boiled linseed oil, calcium carbonate, and universal colorants.

Apply glazing putty with a putty knife to the glass rabbets the pane will rest on. Norbert recommends Sarco Linseed oil-based glazing compound, but it can be expensive. Cheaper options include Dap ...