Stoppers

Laboratory stoppers seal flasks, test tubes, and reagent bottles to prevent contamination, evaporation, and spills. They work by forming tight, chemically compatible seals using materials engineered for temperature and solvent resistance. In labs, stoppers are used during storage, transport, and reactions under reflux or inert atmosphere. Types include rubber and silicone stoppers for general use, glass stoppers for inert sealing, PTFE-lined stoppers for aggressive chemicals, and septum stoppers for syringe access. Better Equipped—your trusted UK lab supplier—stocks a wide range of stoppers, helping you choose the right fit, material, and compatibility for your vessels.