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Click HERE for Best-Practices for Crimping Caps on Vials.


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Standard Aluminum Caps | Safety Caps | Magnetic Caps | Septa

Crimp Caps, also referred to as aluminum seals can offer the longest lasting, tight seal when properly applied and crimped onto a matching serum finish vial. Magnetic crimp caps are made from steel and harder to crimp than aluminum  but, they can be used in autosamplers that require magnetic caps. Aluminum caps are not magnetic.

All MicroSolv™ crimp caps are manufactured with high quality pre-inserted septa. We also offer Open Hole caps which require septa to be purchased separately and manually inserted. Soft-Guard™ caps are the most popular brand due to the design of the septa durometer which is easy for needles to pierce causing less stress on the instruments and missed injections.

Click HERE for Crimp Top Vial Ordering Page.


The Selection "FILTER" buttons refine the Products displayed in the Ordering Chart. They are described below and listed alphabetically by FILTER.

  • BASIK™ Brand Caps - These economical crimp caps have a specially formulated rubber and PTFE that assures a good seal even after many injections and also produces reduced stress on your instrument. It safe-guards your instrument, needle and sample. Different sizes and colors are listed.

  • Cap Color: Select from blue, gold, green, red and the most popular silver caps.

  • Crimp Caps - Size of the cap listed are 8mm, 11mm (for standard 2ml vials) & 13mm.

  • Magnetic - Steel metal caps for use in magnetic carrier autosamplers.

  • MicroSolv™ Brand Caps - Crimp Caps with Sil/PTFE septa and natural rubber for 8 & 11mm vials.

  • Open Hole - Silver aluminum crimp caps without septa

  • Septa - Low Bleed (siloxanes are eliminated), Non-Slit, Pre-Slit, PTFE only for single injections (will not reseal), PTFE-Silicone Rubber-PTFE (red/white/red), White Silicone Rubber with Red PTFE.

  • Soft-Guard™ Caps - Our most popular brand of Crimp Caps due to the softness of the septa that produces a great seal even after several injections.

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