Corrosion-proof liner for chimney outer wall

Claim 1

IN A CHIMNEY HAVING AN OUTER WALL WITH AN INNER AND OUTER SURFACE, AN INTERIOR WALL OF BRICK HAVING AN INNER AND OUTER SURFACE, THE INNER SURFACE OF SAID BRICK WALL BEING DESIGNED TO CARRY CORROSIVE FLUE GASES UPWARDS TO THE ATMOSPHERE, THE INNER SURFACE OF SAID OUTER WALL AND THE OUTER SURFACE OF SAID BRICK WALL BEING SEPARATED AN INSULATING DISTANCE FROM EACH OTHER, THE IMPROVEMENT WHICH COMPRISES A CORROSION-PROOF, VAPOR-IMPERVIOUS CHIMNEY LINER SEALINGLY APPLIED TO THE INNER SURFACE OF SAID OUTER WALL, SAID CHIMNEY LINER ESSENTIALLY CONSISTING OF A FIRST LAYER OF MASTIC MATERIAL SEALINGLY ADHERED TO SAID INNER SURFACE OF SAID OUTER WALL, AT LEAST ONE SHEETLIKE LAYER OF IMPERVIOUS FLUOROCARBON PLASTIC MEMBRANE MATERIAL ADHERED ON ONE SURFACE AGAINST THE EXPOSED SURFACE OF SAID FIRST LAYER OF MASTIC, A SECOND LAYER OF MASTIC SEALINGLY ADHERED ON THE OPPOSITE SURFACE OF THE MEMBRANE MATERIAL, SAID MASTIC MATERIAL SUBSTANTIALLY COMPLETELY COVERING SAID MEMBRANE MATERIAL.