Methods of making the burnthrough resistant non-woven mat include forming the mat from glass fibers and at least two binders, a first binder having a vinyl component and a second binder having a strengthening component. The vinyl component may be, for example, ethylene vinyl chloride, and the strengthening component may be, for example, melamine formaldehyde. In one method, the vinyl component is added to the glass fibers by a beater addition process and the strengthening component is sprayed onto the glass fibers. The burnthrough resistant non-woven mat may be used in conjunction with an insulation blanket, and may be especially suited to use in insulating aircraft.