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Product Overview:

Polylab Plastic Stoppers are essential lab accessories designed to securely seal test tubes, flasks, bottles, and other glassware to prevent leaks, contamination, or evaporation. Made from high-quality, chemical-resistant polypropylene (PP) or polyethylene (PE), these stoppers are durable, reusable, and non-reactive, making them ideal for everyday lab use.

Each Plastic Stopper features a precise, tapered design that ensures a tight, reliable fit without damaging the neck of the glassware. The smooth surface makes insertion and removal easy while providing a secure seal to protect your samples, solutions, or reagents.

Available in multiple sizes, these stoppers are suitable for a wide range of lab applications — from storing chemicals to conducting experiments that require airtight conditions. They withstand exposure to common acids, bases, and solvents, and they can be easily cleaned and sterilized for repeated use.

Whether you’re equipping a school lab or upgrading a professional research setup, Polylab Plastic Stoppers are a cost-effective and safe alternative to traditional cork or rubber stoppers. Combine them with other Polylab Laboratory Closures for a fully equipped, leak-proof lab environment. For related sealing solutions, check out our Lab Bottle Caps and Stoppers collection. For global best practices on safe chemical storage and handling, refer to the Royal Society of Chemistry Laboratory Safety Guidelines, trusted by lab professionals worldwide.