A large box of mod roc that will cover a large area great for covering wire and card understructures just cut off strips of mod roc to required length dunk quickly into tepid water and lie over frameworksmooth over with hands to encourage the plaster to rise to the surface to make a smoother finish and blend the edges and the layers together single 64kg 14lb box offers over 10m2 square metres coveragebulk pack covers approximately 100m2