Will PU polyurethane also protect the print against fading?

es. The ability of a resin sticker to reflect UV rays has an enormous influence on the fact that prints do not fade or yellow. High exposure of advertising stickers to sunlight and other harsh conditions can degrade the print itself if it is protected only by epoxy resin. Only a label with high resistance to atmospheric conditions and ultraviolet radiation, made from transparent polyurethane resin, retains vivid print colours throughout its lifetime.