This paper presents a study of PVC-ceramic composites obtained by twin-screw extrusion. Properties such as colour, wettability, tensile strength, elongation at break and impact tensile strength were studied. Moreover, the composite samples were subjected to UV degradation process and the influence of the composite composition therefore the degradation process on the mentioned properties has been determined. The study showed the dependence of the ceramic content in the material and its granulation on the individual properties. The research showed a significant influence of degradation on the colour and wettability of samples containing ceramic filler with granulation 0.25-0.5 mm, and in the case of tests of mechanical properties, this influence is the greatest for samples with filler with grain size 0.5-1.25 mm. Additionally, the aging process significantly influenced obtained results.