Labware

Precision Seal Septa


Exclusively from Sigma-Aldrich   New! PRECISION SEAL® SEPTA


Non-Contaminating

—Precision Seal natural rubber is lower in solvent extractables: 1.9% vs. standard sleeve stoppers: 5-6%. Precision Seal rubber is higher in density to minimize the effects of solvent degradation. They are manufactured under "White Room" conditions, from one certified lot for absolute consistency in all sizes.

Precision Fit—The longer, tapered plug design of Precision Seal septa fits standard taper joints precisely providing a sealing surface that is 50 to 80% higher than standard sleeve stoppers. The inner seal design of Precision Seal septa minimizes 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 that of a ground glass joint and resists movement once seated.

Safety and Performance—Septa must not slide through the joint or pop-off during cannulation or when under pressure. Pushing on the Precision Seal septum actually tightens the tapered plug to prevent movement. The flexible sleeve on septa sizes for glassware joints is heavy wall and oversized to make folding over glass joints safer. The seal is made by the tapered plug within the joint and not the flexible sleeve.

Exceptional Performance—Precision Seals are made using a certified natural rubber formulation for superior resealability during use.

SAFETY ADVICE—The Precision Seal flexible sleeve must be secured to the glass joint with a Wrap-It Tie or similar device during cannulation and for applications that involve pressure. DO NOT rely on the sleeve alone to anchor the septum. This rule applies to all types of rubber septa that are used for critical applications.



Septa Listings
  White Rubber Red Rubber
For use with: Cat. No. Cat. No.
7mm o.d. glass tubing Z553905 Z554022
8mm o.d. glass tubing Z553913 Z554030
10mm o.d. glass tubing Z553921 Z554049
13mm i.d. tubing Z553948 Z554057
10/30 joints Z553956 Z554065
14/20 joints Z553964 Z554073
15/25 joints Z564656 Z564648
19/22 joints Z553972 Z554081
24/40 joints Z553980 Z554103
29/42 joints Z553999 Z554111
T.S. Mixed set Z554006 Z554138

Septa Caps
  White Rubber Red Rubber
For use with: Cat. No. Cat. No.
5mm NMR tubes Z553891 Z554014
7mm tubes and ampules Z565784 Z565768
10mm tubes and ampules Z565776 Z565792

Precision Seal Accessories
Product Length (in.) Cat. No.
Wrap-it Tie installing tool Z256307
Wrap-it Ties 4 Z105953
  5.6 Z105961
  7.5 Z256331

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