Permeation barrier fuel tank

A permeation barrier fuel tank (10) for a vehicle includes a tank shell (12) having a wall formed from a plurality of layers (30,32,34,36). The layers (30,32,34,36) include at least an inner layer (30), an outer layer (34), a fuel permeation barrier layer (32) disposed between the inner layer (30) and the outer layer (34) and a nanocomposite outer layer (36) disposed adjacent to the outer layer (34).