Migration and surface segregation of low molecular weight oligomers in adhesive formulations is a poorly understood, but hugely important phenomenon, responsible for most of the failures in industrial applications. Although necessary to give appropriate values of glass transition and viscosity, the accumulation of oligomers at surfaces and interface can give rise to weak boundary layers. We have observed this behaviour with a series of proof of principle ion beam analysis experiments, which although sufficiently precise to obtain surface excess values, cannot evaluate existing theories, or test new theories for this behaviour. We require the precision of NR to interrogate the shape of the surface excess profile, which in turn allows us to characterise local interactions and test theoretical self-consistent field theory models.