A biocidal device includes a biocidal material layer having edges, an exposed side, and an adhesive side opposing the exposed side. A patterned adhesive layer is located in contact with the adhesive side and extends to the edges of the biocidal material layer. The patterned adhesive layer includes a non-biocidal portion and a biocidal portion. The biocidal portion includes biocidal materials and extends to at least one edge. The patterned adhesive layer is adhered to at least a portion of a support and at least a part of the biocidal portion that extends along an edge is exposed.
