We describe the production, characterization and performance of magnetron-sputtered Be coatings on aluminum, copper and stainless steel substrates. The coating thickness is typically 300nm. Small samples were characterized by means of Optical Microscopy (OM), Atomic Force Microscopy (AFM) and X-ray induced Photoelectron Spectroscopy (XPS) and Elastic Recoil Detection Analysis (ERDA). The coating quality and adhesion following thermal cycling and neutron irradiation were tested with respect to future applications as storage containers in Ultracold Neutron (UCN) sources. The fractional uncoated area was determined to be 10 −4 to 10 −5 by OM and XPS. These results were confirmed by foil transmission measurements with UCN in the energy range 180 to 230neV. The storage time of a 250l Be-coated Cu container was determined for UCN energies up to 60neV at room temperature and around 90K and the wall loss factor η extracted. We obtained η (90K)=2.7×10 −5 and η(300K)=1.1×10 −4 in good agreement with previously published results.