Splitting Item in half with two different textures

I was wondering if it was possible to add different textures to different sides of my mesh? I have 2 sets of uvs one for each side but I dont know how to assign a texture to the different uvs and I really dont want to go into blender to add a material to each side for all my walls.

Im still confused sorry im kind of a noob at unreal engine I still cant figure out nodes . I would like side 1 black and side 2 white labeled them here. Im not having a problem with two sided thing I just need my material to be split into the 2 sides.