Multilayer assembly comprising five layers: layer A: a substrate layer selected from a thermoplastic, metal and glass; layer B: a barrier layer selected from titanium, gold, palladium, platinum, vanadium and tantalum; in the case where the substrate layer is glass, the barrier layer can also be made of chromium or alloys of chromium with Co, Mo, Ni and/or Fe; layer C: a reflective metallic layer; layer D: an oxidic layer with a thickness of 80 nm - 250 nm, selected from aluminium oxide (AlO x), titanium dioxide, SiO 2, Ta 2 O 5, ZrO 2, Nb 2 O 5 and HfO; layer E: a) a plasma polymer layer (anticorrosive layer) deposited from siloxane precursors selected from hexamethyldisiloxane (HMDSO), octamethylcyclotetrasiloxane (OMCTS), octamethyltrisiloxane (OMTS), tetraethylorthosilane (TEOS) and tetramethyldisiloxane (TMDSO), decamethylcyclopentasiloxane (DMCPS), hexamethylcyclotrisiloxane (HMCTS), trimethoxymethylsilane (TMOMS) and tetramethylcyclotetrasiloxane (TMCTS); alternatively, in the case where layer D consists of aluminium oxide or SiO 2, layer E can be b) a highly refractive metal oxide layer, the metal oxides being selected from titanium dioxide, Ta 2 O 5, ZrO 2, Nb 2 O 5 and HfO, and another layer as defined in layer E (a), i.e. a plasma polymer layer, can optionally be applied. layer A: a substrate layer selected from a thermoplastic, metal and glass; layer B: a barrier layer selected from titanium, gold, palladium, platinum, vanadium and tantalum; in the case where the substrate layer is glass, the barrier layer can also be made of chromium or alloys of chromium with Co, Mo, Ni and/or Fe; layer C: a reflective metallic layer; layer D: an oxidic layer with a thickness of 80 nm - 250 nm, selected from aluminium oxide (AlO x), titanium dioxide, SiO 2, Ta 2 O 5, ZrO 2, Nb 2 O 5 and HfO; layer E: a) a plasma polymer layer (anticorrosive layer) deposited from siloxane precursors selected from hexamethyldisiloxane (HMDSO), octamethylcyclotetrasiloxane (OMCTS), octamethyltrisiloxane (OMTS), tetraethylorthosilane (TEOS) and tetramethyldisiloxane (TMDSO), decamethylcyclopentasiloxane (DMCPS), hexamethylcyclotrisiloxane (HMCTS), trimethoxymethylsilane (TMOMS) and tetramethylcyclotetrasiloxane (TMCTS); alternatively, in the case where layer D consists of aluminium oxide or SiO 2, layer E can be b) a highly refractive metal oxide layer, the metal oxides being selected from titanium dioxide, Ta 2 O 5, ZrO 2, Nb 2 O 5 and HfO, and another layer as defined in layer E (a), i.e. a plasma polymer layer, can optionally be applied. a) a plasma polymer layer (anticorrosive layer) deposited from siloxane precursors selected from hexamethyldisiloxane (HMDSO), octamethylcyclotetrasiloxane (OMCTS), octamethyltrisiloxane (OMTS), tetraethylorthosilane (TEOS) and tetramethyldisiloxane (TMDSO), decamethylcyclopentasiloxane (DMCPS), hexamethylcyclotrisiloxane (HMCTS), trimethoxymethylsilane (TMOMS) and tetramethylcyclotetrasiloxane (TMCTS); alternatively, in the case where layer D consists of aluminium oxide or SiO 2, layer E can be b) a highly refractive metal oxide layer, the metal oxides being selected from titanium dioxide, Ta 2 O 5, ZrO 2, Nb 2 O 5 and HfO, and another layer as defined in layer E (a), i.e. a plasma polymer layer, can optionally be applied.