The use of the new heat-seal adhesive, Beva 371, is described step by step in the lining of an oil painting by the American artist Rembrandt Peale, which was torn. The following new devices and methods connected with the development of Beva are described in detail: 1. Heat-seal facings and their preparation, 2. Bridging of tears; fillings and inlays. 3. Deacidification of decaying canvas, 4. Strengthening of decaying canvas by impregnation, 5. Choice of fiberglass in heat-seal laminates, 6. Preparation of heat-seal laminates. -- AATA