Union Scientific's manually operated Microplate Seal Applicators quickly apply self-adhesive seals to plates of virtually any configuration. Consistent pressure on all wells results in reliable, uniform seals around both round and square well openings, including plates having 1536 or more openings. A model is also available to apply self-adhesive seals to the tops of glass and plastic vials held in 96 position carriers. These simple, patented machines eliminate pain, blisters, or even carpal tunnel syndrome for lab technicians processing larger numbers of plates each day.