PINHOLES
Pinholes can make an otherwise beautiful floor coating resemble a lunar landscape. Fortunately, both craters and related damage can be avoided with simple measures.
Pinholes are small holes in the surface that extend into the coating like needle-thin channels. In addition to ruining an otherwise smooth and glossy finish, pinholes can, in some cases, penetrate the entire coating, allowing moisture and discoloring substances from the underlying concrete to rise to the surface.
Repairs will always remain visible, and the holes are very likely to reappear in the next layer if the treatment is simply repeated. Therefore, it is both easier and more cost-effective to address the issue properly from the beginning.
SEALED SURFACES PREVENT PINHOLES
The risk of pinholes can be minimized by creating a sealed surface before applying the final coating. This can be achieved by skim-coating with an epoxy primer mixed with sand. This method also helps fill minor irregularities in the substrate.
Alternatively, a fully saturating priming coat can be applied using a low-viscosity epoxy primer before the final coating is applied.
