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August 6 - August 10, 2018

If a zinc rich epoxy primer has been applied at lower than the specified thickness, how should this be treated?


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From Larry Muzia of Exceletech Coating & Applications, LLC on August 6, 2018:
Provided the recoat window is still open and there is no surface contamination, it is practical to apply another coat of the organic zinc rich epoxy over itself;  or, as an alternate, if the system is specified to receive an intermediate and finish coat, another option would be to apply 2 intermediates using caution to observe and adhere to dft's. In the case of an inorganic zinc, it is more complicated to apply another coat of inorganic zinc over itself. However, with an organic zinc, it can be overcoated with itself provided the criteria  above are met.

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Tagged categories: Coating / Film thickness; Coating Application; Dry Film Thickness (DFT); Paint application; Primers


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