Stoppers
Stoppers
Stoppers, also known as bungs, are used to give an airtight seal to laboratory flasks and test tubes by fitting tightly inside the neck of the container and preventing material from spilling. Stoppers can be made of glass, cork, rubber, or silicone. They are typically designed with a conical shape, but straight, flanged, and tapered options are also available.
Stoppers are the preferred choice for many applications requiring a tighter seal or a greater degree of chemical resistance. They also provide a good seal when a solution needs to be shaken or mixed without spilling. Stoppers are generally cylindrical in shape and have a tapered bottom end. They may be marked with a stopper number or size on the top and bottom diameters of the stopper. Sizing can vary among manufacturers.
Stoppers are available in a solid design or with holes known as positions placed in the top. Positions allow easy access to the material contained in the sealed vessel by pipettes, tubing, or other equipment without full removal of the stopper.
What Types of Stoppers Are Available?
• Turnover stoppers have external serrations to create an excellent internal seal combined with a flexible turnover sleeve that folds down over the container’s neck to create a double seal
• Serum bottle or vial stoppers have two or three legs with external serrations or straight sides and a flanged top to create an airtight seal
• Straight bromobutyl plug-type stoppers provide a maximum seal for vials and serum bottles with a straight-wall glass finish
• Ultra-pure, straight bromobutyl plug-type stoppers provide high chemical purity and low gas permeability. They offer excellent performance during freeze drying processes such as lyophilization, where stoppers must remain stable during transfer and sublimination phases
• Silicone recessed septa stoppers are non-toxic and have external serrations to create an effective internal seal
Saint Gobain Life Sciences Versilic™ Folding Skirt Stoppers
Silicone biologically neutral Versilic™ Folding Skirt Stoppers.
Saint Gobain Life Sciences Natural Rubber Stoppers
Made from elastic natural rubber, these stoppers are flexible and provide a complete seal and good adhesion. Saint Gobain Life Sciences Performance Plastics™ Natural Rubber Stoppers withstand chemical agents in normal laboratory use. Ideal for use with pipets, vials, bottles, flasks or balloons.
Saint Gobain Life Sciences Versilic™ Silicone Stoppers
Versilic™ Stoppers for biology, microbiology and hematology.
Saint Gobain Life Sciences Silicon Folding Skirt Stopper
Use this stopper for biology, microbiology and hematology, as well as food science, technical, medical and hospital apparatus. Silicon Folding Skirt Stopper is particularly suited for all types of tissue culture work.
Saint Gobain Life Sciences Silicon Cap
Silicon Cap for biology, microbiology and hematology, as well as food science, technical, medical and hospital apparatus.
Saint Gobain Life Sciences Versilic™ Silicone Caps
Use these stoppers for biology, microbiology and hematology, as well as food science, technical, medical and hospital apparatus. Versilic™ Silicone Caps are particularly suited for all types of tissue culture work.
Saint Gobain Life Sciences Pre-Drilled Conical Rubber Stoppers
Saint Gobain Life Sciences Pre-Drilled Conical Rubber Stoppers for use with specially designed dip tubes or vent configurations.
Saint Gobain Life Sciences Versilic™ Silicone Stoppers
Versilic™ Stoppers for biology, microbiology and hematology.
Saint-Gobain Natural Rubber Stoppers
Made from elastic natural rubber, these stoppers are flexible and provide a complete seal and good adhesion. Saint-Gobain Performance Plastics™ Natural Rubber Stoppers withstand chemical agents in normal laboratory use. Ideal for use with pipets, vials, bottles, flasks or balloons.
Saint-Gobain Silicone Iso-Versinic™ Stopper
Saint Gobain Performance Plastics™ Silicone Iso-Versinic™ Stoppers have high chemical resistance especially to hydrocarbons, oils, strong acids and aromatic and chlorinated solvents.
Saint-Gobain Rubber Stoppers
Saint-Gobain Performance Plastics™ Rubber Stoppers are capable of withstanding chemical agents in normal laboratory use.
Saint Gobain Life Sciences Natural Rubber Folding Skirt Stoppers
Use these stoppers for extra protection of tube ends during transport, handling and other operations during which tubes require both internal and end protection. Saint Gobain Life Sciences™ Natural Rubber Folding Skirt Stoppers provide an excellent seal.
Saint Gobain Life Sciences Pre-Drilled Conical Rubber Stoppers
Saint Gobain Life Sciences Pre-Drilled Conical Rubber Stoppers for use with specially designed dip tubes or vent configurations.
Saint Gobain Life Sciences Rubber Folding Skirted Stopper
Use these stoppers for a variety of applications. Saint Gobain Life Sciences™ Rubber Folding Skirted Stopper are particularly suited for chemical transfer.