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- Cap for Test Tube
Material : Polypropylene
HSN Code : 39235010
The Polylab Cap for Test Tube is a top rated laboratory accessory specially designed for secure sealing, contamination prevention, and safe sample protection of laboratory test tubes in professional laboratory environments. As a trusted manufacturer and supplier, Polylab manufactures premium-quality test tube caps using high-grade laboratory materials that ensure excellent durability, chemical resistance, and dependable long-term laboratory performance for scientific, medical, and industrial applications.
Carefully engineered with precision, the test tube cap provides a tight and secure fit that helps prevent sample leakage, contamination, evaporation, and accidental spillage during storage, transportation, and laboratory testing procedures. Its robust sealing mechanism ensures reliable sample integrity while supporting safe handling of biological, chemical, and research samples in demanding laboratory conditions. The cap design also allows easy opening and closing for efficient laboratory workflow management.
The lightweight yet durable construction of the Polylab Cap for Test Tube makes it ideal for continuous use across research laboratories, diagnostic centers, biotechnology facilities, pharmaceutical industries, and educational institutions. Its chemical-resistant and autoclavable properties support repeated sterilization and safe compatibility with a wide range of laboratory reagents, solutions, and testing applications. The ergonomic design also ensures convenient handling and efficient routine laboratory operations.
Code | Particulars | Packing |
|---|---|---|
64021 | Ø 25 mm | 100 Pcs |
As a best-in-class laboratory sealing solution, the Polylab Cap for Test Tube is widely trusted for its superior quality, practical functionality, and reliable performance. Manufactured by a top rated manufacturer and supplier, these caps deliver exceptional protection, efficiency, and convenience for modern laboratory environments requiring safe and contamination-free sample storage.
Ideal for secure sealing, contamination prevention, and safe storage of laboratory samples across various laboratory and scientific environments, including:
Medical & Diagnostic Laboratories: Widely used for securely sealing test tubes during clinical testing, diagnostic analysis, and biological sample storage procedures.
Research & Development Centers: Essential for maintaining sample integrity during scientific experiments, analytical studies, and advanced laboratory research applications.
Biotechnology & Molecular Biology Laboratories: Supports safe storage and contamination-free handling of DNA, RNA, proteins, biological fluids, and laboratory reagents.
Pharmaceutical & Industrial Laboratories: Used for secure sample containment, chemical analysis, pharmaceutical testing, and quality control procedures requiring leak-proof sealing solutions.
Educational Institutions & Training Laboratories: Perfect for schools, colleges, and universities to help students safely handle laboratory samples during practical sessions and scientific experiments.
A reliable and best solution from Polylab, a top rated manufacturer and supplier, trusted across diverse professional laboratory applications.
Designed to provide secure sealing, superior sample protection, and reliable laboratory performance, the Polylab Cap for Test Tube offers advanced features for professional laboratory applications:
Premium Laboratory-Grade Construction: Manufactured using high-quality materials that ensure superior durability, chemical resistance, autoclavability, and dependable long-term laboratory performance.
Leak-Proof Secure Sealing Design: Specially engineered structure provides tight sealing to prevent sample leakage, contamination, evaporation, and accidental spillage during storage and handling.
Chemical Resistant & Autoclavable Properties: Designed for safe usage with various laboratory chemicals and supports repeated sterilization for hygienic and contamination-free laboratory operations.
Easy Fit & User-Friendly Handling: Ergonomic design allows convenient fitting, effortless opening and closing, and efficient handling during routine laboratory procedures.
Lightweight Yet Durable Structure: Strong and reliable construction ensures long-lasting usage and dependable sample protection in demanding laboratory environments.
A best choice from a top rated manufacturer and supplier, ensuring dependable quality, superior sample safety, and efficient laboratory operations.
Choose Polylab – a top rated manufacturer and supplier committed to delivering the best laboratory accessories and scientific solutions with unmatched quality and innovation:
Advanced Manufacturing Quality Standards: Every Cap for Test Tube is manufactured using premium-grade materials and modern production techniques to ensure durability, precision, and reliable laboratory performance.
Trusted Brand with Strong Industry Reputation: Polylab is widely recognized for delivering dependable laboratory products trusted by research institutes, biotechnology laboratories, pharmaceutical industries, and educational organizations.
Innovative & Functional Product Designs: Our laboratory products are developed to improve sample safety, workflow efficiency, operational convenience, and scientific accuracy in modern laboratory environments.
Extensive Usage Across Multiple Industries: Polylab laboratory solutions are extensively used across medical, biotechnology, pharmaceutical, research, educational, and industrial laboratories for consistent performance and reliability.
Strong Commitment to Customer Satisfaction: We focus on delivering the best quality products, dependable support, timely service, and long-term customer trust through continuous product excellence.
Partner with Polylab for the best laboratory sealing and sample protection solutions from a trusted and top rated manufacturer and supplier, delivering excellence, durability, and professional scientific performance in every product.
The inner grooves are precision-molded ridges inside the cap that engage with the outer surface of the test tube. Unlike smooth caps that rely solely on friction, these grooves tighten the fitting on the tube by creating a positive mechanical grip. This ensures the cap remains securely attached even during vigorous handling, centrifugation, temperature changes, or when tubes are stored upside down. This design prevents accidental cap loss that could lead to sample spillage or contamination—making these caps the best choice for secure tube closure.
The outer grooves provide a textured surface that securely holds identification labels. In standard laboratory practice, labels applied to smooth caps often peel off over time, especially under cold, wet, or autoclave conditions. The outer grooves physically anchor labels, preventing detachment and ensuring that critical sample information (patient IDs, dates, experiment codes) remains with the tube throughout its lifecycle. This integrated labeling feature is the best solution for sample traceability and the top rated for reliable identification.
The cap features an integral seal ring—molded as part of the cap, not a separate O-ring that can be lost. When the cap is fully seated on the tube, this seal ring compresses against the tube rim, creating a positive, leakproof seal that prevents liquid escape, evaporation, and ingress of contaminants. The combination of inner grooves (for retention) and seal ring (for sealing) ensures that the cap both stays on and seals effectively, making the tube-cap combination absolutely leakproof.
These caps are designed for test tubes with an outer diameter of 25mm (Ø 25 mm). They are compatible with standard 25mm test tubes from most major manufacturers. Always verify that your test tubes have the correct outer diameter for proper fit.
Yes, these polypropylene caps 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 transparent material, grooves, and seal ring maintain their properties through multiple sterilization cycles.
Yes, the caps are manufactured from transparent polypropylene, allowing visual inspection of tube contents without cap removal. You can easily check fill levels, observe color changes, detect precipitation, or verify sample condition—saving time and reducing handling that could disturb samples.
Code 64021 is supplied in packs of 100 pieces. This economical pack quantity ensures laboratories have an adequate supply for routine use and replacement, while providing excellent value for money.
Polypropylene offers excellent resistance to a wide range of laboratory chemicals including aqueous solutions, dilute acids and bases, alcohols, and many common reagents. For specific chemical compatibility with your samples or disinfectants, consult standard polypropylene resistance charts.
Yes, these caps are suitable for freezer storage at -20°C and -80°C. The inner grooves ensure the cap remains securely attached during temperature changes—unlike smooth caps that can loosen when materials contract. The seal ring maintains its sealing properties at low temperatures. For liquid nitrogen storage (-190°C), specialized cryogenic closures may be more appropriate.
These caps provide excellent protection through multiple integrated features: the inner grooves ensure the cap stays securely attached, preventing accidental opening; the built-in seal ring creates a leakproof barrier against liquid escape and contamination; the outer grooves hold identification labels securely, ensuring sample traceability; the transparent material allows visual inspection without opening; and the autoclavable polypropylene enables sterile use. This comprehensive protection, addressing retention, sealing, identification, and visibility, makes these caps the best choice and the top rated solution for test tube closure.
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.
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