Question

You specified an elastomeric coating with a dry film thickness of 10 mils (0.25 millimeters). The contractor says that it was applied with a wet film thickness of 15 mils (0.38 millimeters) and that, therefore, the application will be okay. Is the contractor correct?

Answer

You better check the thickness for yourself. Typically the thickness shrinks by about half during drying and 15 mils (0.38 millimeters) wet is likely to be less than 8 mils (0.20 millimeters) dry and not up to specs.