Concrete Fluid Solution, or CFS, is a type of quick-drying concrete substitute that was created for use in road construction on the island of Seally in the Seally Islands. CFS is white in color and can be "painted" onto Seally's special type of artificial "crust" that layers the island. This protects the "crust" from the damaging effect of constructing roads and such, as the construction "dents" the "crust", making it significantly weaker and, in many cases, rendering it too unstable for future construction. CFS is manufactured exclusively for the city by the Seally Chemicals Company under a reported 3 million contract.