Trouble Shooting

The depth of the degraded layer brought about by weathering is in the order of several hundred microns in depth. The reaction to photo-oxidation results in the generation of a thin yellow layer at the surface, and this layer prevents the diffusion and permeation of oxygen, and in addition, it also blocks out light. Accordingly, any further photo-oxidation at the interior of the component is prevented.
If it is also desired to prevent the generation of this degraded surface layer, we recommend the use of our weatherable grades.