Evaluation of a protective acrylic finish applied to surfaces painted with acrylic paints for outdoor or indoor uses

Protection of contemporary murals to reduce paint fading caused by exposure sunlight is currently under study due a general demand. In this we evaluated the effectiveness commercial protective acrylic finish applied concrete and brick mock-ups previously painted with different coloured (red yellow) paints for outdoor indoor uses. The were exposed an accelerated aging test, artificial UV irradiation 3630 h. radiation most threatening portion used in these artworks, inducing mainly fading. Colorimetric measurements made on surfaces every 15 days. At end, aged samples respective controls (not subjected test) stereomicroscopy, X-ray diffraction, Fourier transform infrared spectroscopy scanning electron microscopy. Application modified surface paintwork, but generally reduced rate at which colour changed. use without finish, paintwork degraded faster than concrete. findings highlight need appropriate selection depending where they will be suitability using composition each paint.