Charcoal Riven Walling is the flattest of our Riven Walling series; the individual pieces only come out about an inch or less. Corners are made by mitre-cutting the flat pieces and gluing to them to your wall.
Charcoal Riven doesn't need to be sealed but if you do decide to seal it, the colour will become much darker. The pictures show it in the unsealed state. Applying sealer would best be done with a spray tool.