Problem Solving Forum
December 15 - December 22, 2014
What is best way to remedy over-thickness of a topcoat after it has dried and cured?
Rodney White of Independent Consultant on
December 19, 2014:
The first-response answer would be "it depends." I ...read more The first-response answer would be "it depends." It depends on what the substrate is, what type of coating it is, whether the coating is grossly over-applied or simply a bit beyond its recommended max thickness, whether the coating is in service in a critical exposure, and whether there is a detrimental result of the over-thickness.
For example, a corridor wall that has received 6 mils DFT of an acrylic enamel instead of the recommended 3 mils DFT would be well-served by testing an inconspicuous area for adhesion, film defects, etc., and if all seems well, leave it alone.
On the other hand, if the application is in, say, a municipal water supply tank, and the epoxy intermediate coat is over-applied to the point of curtaining, then obviously it should be removed and re-applied. There are literally countless situations in between, so we're back to the original "it depends" response.
garrett bilsborough of custom concrete concepts on
December 18, 2014:
When the over-thick coating is applied to concrete ...read more When the over-thick coating is applied to concrete, a large block sander works great -- just like in the automotive industry, only on a much, much larger scale.