Three black rubber septa displayed on a white surface, each with a conical shape due to one end being wider than the other, intended for different applications or fitments.

A wide range of serrated and non-serrated septa, and sleeve stoppers are available for use as temporary closures for glassware joints, tubes, bottles, NMR tubes, ampules, and cannulation techniques in air-sensitive chemistry. To protect your valuable contents in the vessels or containers from the atmosphere, our range of septa provide reliable air and moisture-tight seals.

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  • Brochure: Precision Seal® Septa

    Precision Seal® Septa are manufactured under “white room” conditions, from one certified raw material formulation for absolute consistency in all sizes, from lot-to-lot.

An assortment of white Precision Seal® septa against a light blue background

Precision Seal septa

Precision Seal® septa are made from certified natural rubber formulation to provide superior resealability. Our Precision Seal® septa do not slide through the joint or pop-off during cannulation or when under pressure and can be used while working with organic solvents. The longer, tapered plug design of Precision Seal® fits standard taper joints providing a sealing surface that is 50 to 80% higher than standard sleeve stoppers. The inner seal design of Precision Seal® septa minimize chemical and solvent vapor migration up the joint to the sleeve which can swell, leak, or fail from exposure. The surface texture of the rubber is similar to a ground glass joint and resists movement once seated. Our Precision Seal® septa are manufactured under "White Room" conditions, from one certified lot to obtain absolute consistency in all sizes. 

An array of six Suba-seal septa in red, blue, and beige, featuring various sizes and shapes, scattered on a white background, with ridges for grip or attachment.

Suba-seal septa

We supply genuine Suba-seal septa which provide the best quality turn-over closure available with serrated stopper. Our Suba-seal rubber septa are available in different dimensions, ideal for air and moisture sensitive chemistry procedures. After piercing with a non-coring needle, rubber closes the puncture, protecting the contents of vessel or container from atmosphere. We also provide Suba-seal silicone rubber septa for high heat applications (up to 200 °C continuous) with improved chemical resistance compared to natural rubber and autoclavable for sterile uses. 

Natural rubber septa (sleeve stopper) on a laboratory flask.

Natural rubber septa (sleeve stopper)

Natural rubber septa are made of natural rubber low-density that can be used to cover mild organic solvents and aqueous solutions. We offer natural rubber septa with your choice of various dimensional alternatives.

Other septa and accessories

 We offer a wide selection of septa including, Sleeve stopper septa, Pigment free septa, Serrated septa, and Precision Seal® septa caps for suitable applications.

Discover our comprehensive GC Septa product range and specialized hand tools that provide a leak-free seal to maintain carrier gas pressure inside the system and for handling repeated puncturing by a syringe needle during sample injections.

Browse septa accessories that include dispenser bins, Wrap-it tie – excellent for securing rubber septa to bottles and flask joints, and the Wrap-it tie installing tool available in heavy-duty version and economy version.

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