Silicone rubber stopper

Silicone rubber stopper

Chemical labs are always in constant need of seals that will close their tubes and beakers off properly. These test tubes and test beakers contain dangerous chemicals that can spill everywhere and prove dangerous and lethal hazards if not sealed. Ordinary plastic stoppers don’t do the job properly as they can be quickly melted by the acidic chemicals and high temperatures chemical labs operate at.

So an automatic need arises for a stopper that’s not only resilient but can also resist high amounts of temperature so the test tubes can be used in chemical experiments. Additionally, and also most importantly, the stoppers need to seal the test tubes perfectly because some chemicals are so volatile that even one drop can prove lethal. There is only one perfect solution for this problem that not only fulfills all the demands required of it but does it flawlessly. 

The solution is silicone rubber stoppers. Silicone rubber stoppers are perfect for industrial use as well as scientific use in chemical labs. They are versatile and fit any type of airlocks, especially that of the test tubes and beakers. They are designed to be adaptable and even elastic to some extent. However, don’t let that instill doubts in your mind about its capability. Silicone rubber stoppers seal perfectly any holes you give them, provided you choose the correct size. 

Silicone rubber stoppers are anti acidic and corrosion-resistant, which makes them perfect for chemical exposure. Moreover, silicone rubber stoppers are not a one-time thing where you use them and throw them away – they can be used as many times as you want, especially if you maintain them properly. They also show excellent heat resistance and cold resistance when it comes to temperatures, with the ability to endure about 170 degrees celsius to -28 degrees celsius. No matter the environment, silicone rubber stoppers will deliver.  

Stopper & Plug Size Catalog

Compare four stopper profiles and check the selected part dimensions against your opening and available depth. Each profile has its own drawing and dimension meanings.

Custom colors are available to your Pantone color code. Include the code in your inquiry.

Blind-Hole · RSTTapered · RSAUndercut · RSBT-Shaped · RSD

RST T-Shaped Plugs

Match stem diameter A, flange diameter B, stem length C and flange thickness D. E refers to the underside recess; use the selected row and approved drawing to confirm the actual profile.

Dimension guide

Product appearance

PartNo.	A（mm）	B（mm）	C（mm）	D（mm）	E（mm）
RST2.5-5.5-5.3	2.5	5.5	5.3	2	0
RST2.7-5.5-5	2.7	5.5	5	2	0
RST3-4.3-4.5	3	4.3	4.5	0.8	0
RST3-7-7	3	7	7	2.2	0
RST3.3-6.5-6	3.3	6.5	6	1.5	0
RST3.5-6.5-6	3.5	6.5	6	2	0
RST3.8-7-10.5	3.8	7	10.5	1.5	0
RST3.8-7-7	3.8	7	7	1.5	0
RST3.8-7-6	3.8	7	6	1.5	0
RST4-7.5-6	4	7.5	6	2	0
RST4-9.5-7	4	9.5	7	2.5	0
RST4.3-8-6	4.3	8	6	1.5	0
RST4.5-7.5-6	4.5	7.5	6	2	0
RST4.8-6.8-3.6	4.8	6.8	3.6	0.9	0
RST4.8-9-7	4.8	9	7	1.5	0

Need a different fit? Share the opening dimensions, mating profile and intended use for a custom size.

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