Coatings formulators target various rheology profiles to deliver high quality coatings with a desirable application experience and final application properties. Typically, these rheology profiles are developed under laboratory or controlled temperature conditions (such as 20-25 °C). Although much effort goes into formulating a coating for optimum application properties, as the film dries, the climatic conditions at the time the paint is applied critically affect the actual rheology, impact flow, sag and other properties. This impact is typically largest for paints applied outdoors because of the larger temperature ranges experienced. For example, hot conditions usually decrease paint viscosity, potentially resulting in ...
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