- Home
- Plastic Stopper
Material : Polypropylene
HSN Code : 39235010
The Polylab Plastic Stopper is a top rated laboratory sealing solution designed for secure closure, reliable protection, and safe handling of laboratory glassware and plasticware across professional scientific environments. As a trusted manufacturer and supplier, Polylab manufactures high-quality plastic stoppers using premium laboratory-grade materials that provide excellent durability, chemical resistance, and dependable long-term performance in demanding laboratory applications.
Specially developed for precision sealing, the Plastic Stopper ensures tight fitting and effective protection against leakage, contamination, moisture exposure, and evaporation during laboratory procedures and sample storage operations. Its carefully engineered structure allows secure closure for test tubes, flasks, reagent bottles, and other laboratory containers, helping maintain sample purity and laboratory safety standards. The smooth and practical design also enables convenient insertion and removal during routine laboratory handling.
The strong yet lightweight construction of the Polylab Plastic Stopper makes it highly suitable for repeated usage in medical laboratories, research facilities, educational institutes, pharmaceutical industries, and industrial testing laboratories. Its chemically stable and corrosion-resistant properties ensure compatibility with a wide range of laboratory reagents, chemicals, and solutions. The durable material construction also supports long-term performance without cracking, deformation, or wear under regular laboratory conditions.
Code | Particulars | Packing |
|---|---|---|
64031 | 10/19 | 100 Pcs |
64032 | 12/21 | 100 Pcs |
64033 | 14/23 | 100 Pcs |
64034 | 19/26 | 100 Pcs |
64035 | 24/29 | 100 Pcs |
64036 | 29/32 | 100 Pcs |
As a best-in-class laboratory sealing accessory, the Polylab Plastic Stopper is widely trusted for its superior quality, reliable functionality, and efficient performance in laboratory sample protection and storage applications. Manufactured by a top rated manufacturer and supplier, these plastic stoppers deliver exceptional sealing efficiency, convenience, and safety for modern scientific and industrial laboratory operations.
Ideal for secure sealing, contamination prevention, and safe storage applications across various laboratory and industrial environments, including:
Medical & Diagnostic Laboratories: Widely used for sealing laboratory containers, test tubes, and sample bottles during diagnostic testing and clinical laboratory procedures.
Research & Development Centers: Essential for maintaining sample integrity and preventing contamination during scientific experiments, analytical studies, and research applications.
Biotechnology & Pharmaceutical Industries: Supports secure storage and handling of biological samples, chemicals, reagents, and pharmaceutical solutions in controlled laboratory environments.
Educational Institutions & Training Laboratories: Perfect for schools, colleges, and universities to help students safely handle laboratory containers and scientific experiments during practical sessions.
Industrial & Chemical Testing Laboratories: Used for safe sealing of laboratory glassware and containers during industrial testing, quality control analysis, and chemical handling operations.
A reliable and best solution from Polylab, a top rated manufacturer and supplier, trusted across diverse professional laboratory applications.
Designed to provide secure sealing, reliable protection, and efficient laboratory handling, the Polylab Plastic Stopper offers advanced features for professional scientific applications:
Premium Laboratory-Grade Material: Manufactured using high-quality plastic material that ensures superior durability, chemical resistance, and dependable long-term laboratory performance.
Tight & Secure Sealing Performance: Specially engineered structure provides firm fitting and effective sealing to prevent leakage, contamination, moisture entry, and evaporation of laboratory samples.
Chemical & Corrosion Resistant Design: Suitable for use with various laboratory chemicals, reagents, and solutions without affecting product integrity or sealing performance.
Lightweight Yet Highly Durable Construction: Strong and practical design ensures repeated laboratory usage while maintaining shape, stability, and reliable functionality over time.
Easy Insertion & Convenient Handling: Ergonomic and user-friendly design allows effortless fitting, removal, cleaning, and efficient day-to-day laboratory operations.
A best choice from a top rated manufacturer and supplier, ensuring dependable quality, superior sealing performance, and safe laboratory sample protection.
Choose Polylab – a top rated manufacturer and supplier committed to delivering the best laboratory accessories and scientific solutions with superior quality and innovation:
Modern Manufacturing Excellence: Every Plastic Stopper is manufactured using premium-grade materials and advanced production processes to ensure precision, durability, and reliable laboratory performance.
Recognized & Trusted Industry Brand: Polylab has earned strong trust among laboratories, research centers, pharmaceutical companies, and educational institutions for delivering dependable laboratory products.
Innovative Product Engineering: Our laboratory accessories are designed to improve sealing efficiency, laboratory safety, workflow convenience, and long-term usability in professional environments.
Wide Industrial & Laboratory Acceptance: Polylab products are extensively used across medical, biotechnology, pharmaceutical, educational, research, and industrial sectors for consistent performance and reliability.
Customer-Focused Quality Commitment: We prioritize superior product quality, dependable support, timely service, and long-term customer satisfaction through continuous innovation and manufacturing excellence.
Partner with Polylab for the best laboratory sealing and protection solutions from a trusted and top rated manufacturer and supplier, delivering reliability, durability, and professional scientific performance in every product.
These polypropylene stoppers offer several significant advantages over glass stoppers: they are unbreakable, eliminating safety hazards and sample loss from broken glass; they will not freeze or stick in place like glass stoppers can, ensuring easy removal even after prolonged use; they provide a completely leakproof seal while remaining easy to insert and remove; the ergonomic top knob is more comfortable to handle than small glass knobs; they are autoclavable; and they are more economical, especially in the 100-piece packs. These advantages make them the best choice for replacing glass stoppers.
Six standard sizes are available, corresponding to common ground glass joint sizes:
• Code 64031: 10/19 size
• Code 64032: 12/21 size
• Code 64033: 14/23 size
• Code 64034: 19/26 size
• Code 64035: 24/29 size
• Code 64036: 29/32 size
The numbers typically refer to the nominal diameter and length dimensions that ensure proper fit with standard bottle and flask necks. Select the size that matches your glassware.
The top knob is designed with user comfort in mind—larger than typical glass stopper knobs, with a textured, non-slip surface and an optimal shape that fits naturally in the hand. This design provides comfortable grip and leverage for easy insertion and removal, eliminating the finger strain and discomfort often experienced with small glass stopper knobs. This makes repeated handling throughout the day a pain free exercise.
Yes, these stoppers provide a completely leakproof combination when placed properly on the bottle or flask neck. The precision-molded polypropylene has slight natural flexibility that allows it to conform to the glass neck, creating a perfect seal that prevents liquid evaporation, spillage, and contamination. The seal is effective for both upright storage and when vessels are inverted or shaken.
Yes, these polypropylene stoppers are fully autoclavable at standard sterilization temperatures (121°C). They can be repeatedly autoclaved without degradation, making them suitable for sterile applications in microbiology, cell culture, and other aseptic techniques. The material maintains its properties and sealing ability through multiple sterilization cycles.
No, unlike glass stoppers that can become ground-in or frozen due to chemical residue, salt formation, or temperature changes, polypropylene stoppers maintain easy removability while retaining their sealing properties. They will not stick or freeze in place, even after prolonged contact with chemicals or exposure to temperature variations. This is one of their key advantages over glass.
Polypropylene offers excellent resistance to a wide range of laboratory chemicals including aqueous solutions, dilute acids and bases, alcohols, and many common reagents. However, prolonged exposure to strong oxidizing agents, concentrated acids, or some organic solvents (particularly chlorinated or aromatic solvents) may affect the material. For specific chemical compatibility with your reagents, consult standard polypropylene resistance charts.
All six sizes (64031 through 64036) are supplied in economical packs of 100 pieces. This bulk packaging ensures laboratories have an ample supply of each size for all their glassware, reduces reordering frequency, and provides exceptional value for money.
These stoppers are designed for standard sealing applications and may not be suitable for high-vacuum work where specialized vacuum stoppers or greased ground glass joints are required. For light vacuum applications, they may provide adequate sealing, but always test under your specific conditions.
These plastic stoppers combine multiple features that make them superior to glass: unbreakable construction for safety; ergonomic top knob for comfort; completely leakproof seal for sample protection; six standard sizes for broad compatibility; autoclavable for sterile applications; chemical resistance for durability; non-sticking properties for convenience; and economical 100-piece packs for value. This comprehensive design, addressing all the shortcomings of glass stoppers, makes these the best choice and the top rated solution for bottle and flask closures.
PolyLab offers a comprehensive range of high-quality plastic laboratory ware designed for accuracy, durability, and everyday laboratory applications across education, research, healthcare, and industrial sectors.
Copyright © 2026 PolyLab, All Rights Reserved.
