A fuel container having walls defining a space in which fuel is to be contained, a layer of deformable material bonded to the external surfaces of the container walls, and a self-sealing layer of fuel-activated swellable material bonded to the deformable material, wherein said self-sealing layer is a latex foam, in particular a natural rubber latex foam, comprising a non-ionic associative thickener as rheology modifier and optionally other additives such as foam enhancers, foam stabilizers, accelerators and vulcanization components.