Predulon is the best biodegradable cleaner & degreaser around. It has a unique formula which is different from other cleaners by separating the layers of dirt, grease or old silicon waxes from the surface to be cleaned. Predulon also brings back the original colours of all plastics, rubber or leather parts inside and outside your vessel.
Use predulon to ensure you start with a perfectly clean surface, contamination free. If you apply Dulon Polish and don't use Predulon, traces of old wax polish may get trapped underneath the Dulon membrane. This wax may deteriorate & go yellow under the Dulon membrane, especially carnuba wax. Always use Predulon to properly clean the surface before polishing!