UV Resistant Paint Australia

uv resistant paint

UV paint – what does it mean?

UV paint can either refer to coatings which are UV reactive, thus cure under exposure to UV rays, or to UV resistant paint which which is somewhat immune to effects of UV light. This article deals with the latter; UV resistant paint. Ultra violet (UV) rays are one of the main causes of coatings losing colour and surfaces deteriorating. UV resistant coatings are ideal for outside surfaces which are subject to sunshine. Nowadays, most of the exterior wall paints for example are UV resistant as a standard. Next to Architecture and design, these coatings are also common in other industries such as:

  • Automotive
  • Marine
  • Construction

UV resistant coating for plastic

The UV stabilisation is an indispensable element of the plastic coating in for example the automobile exterior. In ideal circumstances, these are multi-layer systems. The coating of plastics begins with the application of a primer, which has a binding effect on the basecoat, that is then applied over the primer. Finally, a clearcoat containing the light stabilisers for UV protection seals the coating system.

This, however, exacerbates the problem of migration: the organic substrate makes it possible for the stabilizers to migrate into the plastic and also permits the migration of the plastic stabilisers to the top surface of the coating. With a decrease in the concentration of UV protector in the paint surface, the protective function of the coating, by definition, also decreases. Plastic stabilisers migrating upwards from the substrate cause yellowing in the topcoat or, in the worst case, can even lead to loss of adhesion.

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