Multi Purpose linseed oil based putty, ideal for use as a wood filler or for glazing. For external single glazing into primed soft wood, hardwood frames and steel. As a window putty or glazing putty, ensure the surface is clean and dry and dust free. Ensure steel and bare woods are primed with a coat of suitable primer. Linseed oil putty must be over coated with paint or exterior varnish, as soon as the linseed oil putty is firm or within 28 days of application.