One size does not fit all.

This goes for rubber stoppers used in various industries.

The rubber stoppers are made of different shapes and diameters to give the perfect fit.

Rubber plugs are used to stop spillage and seal the containers so it is important the right type of rubber stopper is used.

Therefore, in this article, I will tell you what rubber stoppers are and nine different types of rubber stoppers.

So, let’s find out.

What Is a Rubber Stopper?

A rubber stopper is a small, tapered plug used to seal the openings of test tubes, flasks and other laboratory glassware. Stoppers made of cork are also available for this purpose. However, rubber stoppers are preferable for applications that require a tighter seal or a greater degree of chemical resistance.

Purpose

The primary purpose of a rubber stopper is to prevent a gas or liquid from escaping its container during a scientific experiment. Rubber stoppers can also prevent the contamination of samples by protecting the contents of laboratory glassware from air. Last, the use of rubber stoppers allows experimenters to shake or mix solutions without spilling them.

Size

Rubber stoppers typically range in diameter from size 000 (0.5 inches) to size 16 (5 inches) at the top. The tapered bottom end ranges from five-sixteenths to 3.5 inches. Smaller stoppers are appropriate for test tubes and similar glassware; larger stoppers are appropriate for flasks and beakers.

9 Types of Rubber Stoppers

The Solid Stopper

Solid Stopper is the most common rubber stopper type and used in many applications in our everyday lives. These stoppers are also used in wineries and breweries.

The One-Hole Stopper

The one-hole stopper is common in laboratories because these types of rubber stoppers allow the scientists to insert thermometers and other devices in the container through the hole. And they don’t have to open the flask or container. This kind of rubber stopper is available in different sizes.

The Two-hole Stopper

This type of rubber stopper is also readily available in the laboratories. This helps the scientists to insert multiple instruments in the container at the same time. And it has the tightest fit even if it has two holes in the stopper.

Tapered Caps and Plugs

Tapered caps are the most common shape for a rubber plug. It is great for daily use and has a tight fit. They are available in many different diameters.

Push-fit Caps

Push-fit caps are best for storage and transportation purposes as they provide a tight fit without the need for fasteners. They also come in various shapes and sizes.

Rubber Bolt Caps and Plugs

The rubber bolt plugs are best for hydraulic hose fittings.

Vinyl End Caps

Vinyl caps are the most stretchy and flexible rubber stopper type. They are easy to remove even though they fit very tightly.

Protection for pipes caps

Protection caps are mostly round rubber end caps for pipes. They protect pipes from damage, spillage, and contamination. They are available in various diameters.

Parallel protection plugs

As the name says, parallel protection plug protects the container from dirt, moisture, and corrosion.

First Rubber is a professional rubber stopper manufacturer. Feel free to contact Hebei Xiangyi for more information.