Sunlight causes degradation of coatings. UV light causes color to fade - a form of corrosion. UV also causes coatings to become brittle. This test procedure is performed in a chamber under UV light and condensation at high temperatures.

The test involves cycles of condensation and UV exposure and for the current study, the cycle was as follows: 4 hrs of UV with 313 nm lamps at 60 C and 4 hrs of condensation at 50 C.

At the conclusion of this test, which lasted 30 days, the reflectivity of the exposed surface was compared to the reflectivity of the unexposed surface. This is called a "Sheen Test". The difference is expressed as the percentage loss of reflectivity.

(Storm Greeter was tested alongside Chemthane 2260. Chemthane 2260, a 2 component polyurethane,
also requires a coating of Chemthane 3360 as a UV protection.)