Wax deposits are typically caused by poorly soluble wax which is present in the crude, becoming insoluble as temperature drops thus forming a solid wax. This is treated using a solvent based product which helps remove the wax by solubilising it and making it liquid enough for removal. These solvent products contain solvents that are much more able to dissolve the wax at normal temperatures and keep it dissolved in solution.
Degreasing is required to help remove oils, greases heavy crudes etc on surfaces prior to treatment. This is required to make the surfaces water wet and allow cleaning chemicals contact the problem area underneath the oil and grease which can act as a barrier to water-based cleaning chemicals. Typically cleaning chemicals work much more effectively – leading to a higher standard of cleanliness – when the surfaces to be treated are properly degreased beforehand. However, in cases where the grease / oil contamination is not high it may be possible to use a combined product where the active degreasing ingredient is present in the treatment chemical and help reduce the amount of chemical waste generated.