Plastic Stopper

Quick answer: Plastic Stoppers are tapered, chemically-inert closures used to seal flasks, bottles and other laboratory vessels, keeping volatile reagents contained and preventing contamination between uses. Plastic Stopper is priced at approximately ₹125 (indicative market benchmark, incl. GST, August 2026).

Plastic Stoppers provide a simple, reusable way to seal laboratory glassware and containers, with a tapered shape designed to create a snug, reasonably airtight fit across a range of standard vessel neck sizes. This helps prevent volatile reagents from evaporating unnecessarily between uses, and keeps solutions or samples protected from dust, moisture or contamination while stored on a shelf or bench. Made from chemically inert plastic, these stoppers resist reaction with common laboratory chemicals and offer a durable, break-resistant alternative to glass or cork stoppers for everyday use across a school, college or research chemistry laboratory.

Technical Specifications

Applications

• Sealing flasks and bottles to reduce evaporation of volatile reagents
• Protecting stored solutions or samples from dust, moisture and contamination
• General vessel closure for everyday laboratory storage needs
• Reusable stopper for routine chemistry lab consumable needs

Care & Maintenance

• Clean and dry thoroughly between uses to avoid transferring residue between reagents
• Check for cracking or deformation periodically and replace if the seal is no longer secure
• Store away from extreme heat, which can warp plastic components

Why Choose STEMAids

STEMAids supplies a wide range of Chemistry Lab Equipments including Conductivity Tester for related laboratory and classroom needs. Eduscope Smart Learning Solutions Private Limited is a Udyam-registered micro manufacturing enterprise (UDYAM-DL-06-0069460) and ISO 9001:2015 certified, supplying schools, colleges and vocational institutes across India and for export.

Frequently Asked Questions

What is a plastic stopper used for?

It is used to seal laboratory vessels such as flasks and bottles, reducing evaporation of volatile reagents and protecting stored contents from contamination.

Does this stopper create an airtight seal?

The tapered design is intended to create a snug fit across standard vessel neck sizes; exact airtightness has not been independently tested for this listing — for critical airtight-storage needs, confirm suitability with STEMAids.

Is this stopper resistant to laboratory chemicals?

It is described as chemically inert, but compatibility with specific aggressive chemicals has not been independently verified for this listing — confirm compatibility with STEMAids for demanding applications.

Does STEMAids supply this in bulk for institutional labs?

Yes — STEMAids supplies laboratory consumables including stoppers for institutional and bulk orders; contact STEMAids to confirm current quantities and pricing.

Are exact stopper size ranges available for tender specification?

Exact size ranges and neck-diameter compatibility have not been independently verified for this listing. Institutions preparing tender documents should confirm precise specifications directly with STEMAids before finalising procurement paperwork.

Is STEMAids a registered manufacturer of this product?

Yes. Eduscope Smart Learning Solutions Private Limited is a Udyam-registered micro manufacturing enterprise (UDYAM-DL-06-0069460) and is ISO 9001:2015 certified. See the About page for full registration and certification details — manufacturer-stated, verify before citing in procurement documents.

Last updated: 29 August 2026.