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Bottle Septa

The applied septum is crucial for optimal analysis. Primarily, the septum should be inert to the sample solution and at the same time protect it from outside contamination as well as from possible evaporation. Almost all sealing discs are coated on one side with PTFE (Polytetrafluoroethylene), which has a high chemical resistance and forms an inert barrier between the sample and the carrier material of the septum. The carrier materials have different physical and chemical properties, e.g. temperature resistance, reclosing properties, purity, hardness, thickness, etc. We offer bottle septa with a diameter of 8mm to 22mm. Select the needed size in the drop down menu on the left.

Choose from septa by PerkinElmer and our home brand Altmann Analytik. These septa are a low cost and high quality alternative.

Detailed information on the properties and the selection of a suitable septum can be found here.

Items 201-250 of 255

Product Image of Vial Cap, Septa 10mm x 0.060 1000/PAK Red PTFE/White Silicone
Vial Cap, Septa 10mm x 0.060 1000/PAK Red PTFE/White Silicone
Item number: RE21148
Brand: Restek
$238.00
Product Image of Vial Cap, Septa 8mm x 0.065/PAK of 1000 Red PTFE/White Silicone
Vial Cap, Septa 8mm x 0.065/PAK of 1000 Red PTFE/White Silicone
Item number: RE21147
Brand: Restek
$196.00
Product Image of 8 mm Teflon/Silicone Septa,60MIL, 100/PAK
8 mm Teflon/Silicone Septa,60MIL, 100/PAK
Item number: TFC4013-60
Brand: National Scientific
$20.43
Product Image of Septa, 10/90, Teflon/Silicone for 18-400, 100/PAK
Septa, 10/90, Teflon/Silicone for 18-400, 100/PAK
Item number: TFB7995-18
Brand: National Scientific
$62.44
Product Image of Septa, 10/90, Teflon/Silicone for 15-425, 100/PAK
Septa, 10/90, Teflon/Silicone for 15-425, 100/PAK
Item number: TFB7995-15
Brand: National Scientific
$47.69
Product Image of Septa, 10/50, Teflon/Silicone for 13-425, 100/PAK
Septa, 10/50, Teflon/Silicone for 13-425, 100/PAK
Item number: TFB7995-13
Brand: National Scientific
$38.60
Product Image of Sample bottle insert, screw cap, 8 mm, 150 µl, conical extended tip, 100 pc/PAK
Sample bottle insert, screw cap, 8 mm, 150 µl, conical extended tip, 100 pc/PAK
Item number: AG8010-0125
Brand: Agilent Technologies
$66.49
Product Image of 22mm PTFE/Silicone Discs, 1000 pc/PAK
22mm PTFE/Silicone Discs, 1000 pc/PAK
Item number: OV257201000
Brand: Ohio Valley
$381.00
Product Image of 18mm Natural PTFE/Clear Silicone Discs, 2.5 mm Thick, 1000 pc/PAK
18mm Natural PTFE/Clear Silicone Discs, 2.5 mm Thick, 1000 pc/PAK
Item number: OV40351000
Brand: Ohio Valley
$371.00
Product Image of 20 mm PharmaFix PTFE/Butyl Septa for Head Space Vials, 72/PAK
20 mm PharmaFix PTFE/Butyl Septa for Head Space Vials, 72/PAK
Item number: OV19397
Brand: Ohio Valley
$70.94
Product Image of 8 mm Red PTFE (0.045 inch) / White Silicone Liners, 1000/PAK
8 mm Red PTFE (0.045 inch) / White Silicone Liners, 1000/PAK
Item number: OV1310510
Brand: Ohio Valley
$132.75
Product Image of 8 mm Red PTFE (0.045 inch) / White Silicone Liners, 100/PAK
8 mm Red PTFE (0.045 inch) / White Silicone Liners, 100/PAK
Item number: OV13105
Brand: Ohio Valley
$21.05
Product Image of 22 mm PTFE/Rubber Discs, 72/PAK
22 mm PTFE/Rubber Discs, 72/PAK
Item number: OV25740
Brand: Ohio Valley
$31.00
Product Image of 22 mm PTFE/Rubber Discs, 72/PAK
22 mm PTFE/Rubber Discs, 72/PAK
Item number: OV25738
Brand: Ohio Valley
$32.00
Product Image of 18 mm PTFE/Rubber Discs, 72/PAK
18 mm PTFE/Rubber Discs, 72/PAK
Item number: OV25737
Brand: Ohio Valley
$57.00
Product Image of 16 mm PTFE/Rubber Discs, 72/PAK
16 mm PTFE/Rubber Discs, 72/PAK
Item number: OV25736
Brand: Ohio Valley
$26.40
Product Image of 12 mm PTFE/Rubber Discs, 72/PAK
12 mm PTFE/Rubber Discs, 72/PAK
Item number: OV25732
Brand: Ohio Valley
$23.20
Product Image of 8 mm PTFE/Rubber Discs, 72/PAK
8 mm PTFE/Rubber Discs, 72/PAK
Item number: OV25730
Brand: Ohio Valley
$28.20
Product Image of 22 mm PTFE/Silicone Discs, 72/PAK
22 mm PTFE/Silicone Discs, 72/PAK
Item number: OV25722
Brand: Ohio Valley
$70.00
Product Image of 22 mm PTFE/Silicone Discs, 72/PAK
22 mm PTFE/Silicone Discs, 72/PAK
Item number: OV25720
Brand: Ohio Valley
$70.00
Product Image of 16 mm PTFE/Silicone Discs, 72/PAK
16 mm PTFE/Silicone Discs, 72/PAK
Item number: OV25718
Brand: Ohio Valley
$50.75
Product Image of 13 mm PTFE/Silicone Discs, 72/PAK
13 mm PTFE/Silicone Discs, 72/PAK
Item number: OV25716
Brand: Ohio Valley
$41.00
Product Image of 12 mm PTFE/Silicone Discs, 72/PAK
12 mm PTFE/Silicone Discs, 72/PAK
Item number: OV25714
Brand: Ohio Valley
$32.75
Product Image of 8 mm PTFE/Silicone Discs, 72/PAK
8 mm PTFE/Silicone Discs, 72/PAK
Item number: OV25712
Brand: Ohio Valley
$34.00
Product Image of 20 mm PTFE/Silicone Discs, 72/PAK
20 mm PTFE/Silicone Discs, 72/PAK
Item number: OV22720
Brand: Ohio Valley
$94.00
Product Image of 18mm PTFE/Silicone Discs, 72/pk
18mm PTFE/Silicone Discs, 72/pk
Item number: OV4035
Brand: Ohio Valley
$55.00
Product Image of 12mm PTFE/Silicone Discs, 72/pk
12mm PTFE/Silicone Discs, 72/pk
Item number: OV4013
Brand: Ohio Valley
$33.00
Product Image of 20 mm Septum Mininert Valves, 12/PAK
20 mm Septum Mininert Valves, 12/PAK
Item number: OV24488
Brand: Ohio Valley
$172.13
Product Image of 20 mm PTFE faced Butyl Rubber Septa Stopper (Package), Bulk Bag, 1000/PAK
20 mm PTFE faced Butyl Rubber Septa Stopper (Package), Bulk Bag, 1000/PAK
Item number: OV241681000
Brand: Ohio Valley
$1,125.19
Product Image of 20 mm PTFE faced Butyl Rubber Septa Stopper, 72/PAK
20 mm PTFE faced Butyl Rubber Septa Stopper, 72/PAK
Item number: OV24168
Brand: Ohio Valley
$122.19
Product Image of 20 mm Silicone Rubber Septa Stopper, 72/PAK
20 mm Silicone Rubber Septa Stopper, 72/PAK
Item number: OV24163
Brand: Ohio Valley
$94.50
Product Image of Hitachi Septa 77, 50/PAK
Hitachi Septa 77, 50/PAK
Item number: OV237765
Brand: Ohio Valley
$87.00
Product Image of 10 mm Septa 77, 50/PAK
10 mm Septa 77, 50/PAK
Item number: OV237745
Brand: Ohio Valley
$85.00
Product Image of Shimadzu Septa 77, 50/PAK
Shimadzu Septa 77, 50/PAK
Item number: OV237735
Brand: Ohio Valley
$84.00
Product Image of 8 mm Blue PTFE/Silicone Septa, Bulk Bag, 1000/PAK
8 mm Blue PTFE/Silicone Septa, Bulk Bag, 1000/PAK
Item number: OV1311510
Brand: Ohio Valley
$190.85
Product Image of 8 mm Blue PTFE/Silicone Septa, 100/PAK
8 mm Blue PTFE/Silicone Septa, 100/PAK
Item number: OV13115
Brand: Ohio Valley
$32.60
Product Image of 17 mm HiTEMP Green Septa (Max Temp: 350-375C), 50/PAK
17 mm HiTEMP Green Septa (Max Temp: 350-375C), 50/PAK
Item number: OV246624
Brand: Ohio Valley
$74.50
Product Image of 13 mm PTFE/silicone septa, 100 pc/PAK
13 mm PTFE/silicone septa, 100 pc/PAK
Item number: WNW240583A
Brand: DWK Wheaton
$142.72
Product Image of Septum 20Mm Black Butyl / Grey PTFE Molded Pharmafix 3Mm Thickness 100pc/PAK
Septum 20Mm Black Butyl / Grey PTFE Molded Pharmafix 3Mm Thickness 100pc/PAK
Item number: TF6A20CBT3
Brand: Thermo Fisher Scientific
$108.94
Product Image of Septum, clear Silicone / Beige PTFE mm Thickness 100pc/Pack
Septum, clear Silicone / Beige PTFE mm Thickness 100pc/Pack
Item number: TF6A24ST26
Brand: Thermo Fisher Scientific
$119.42
Product Image of Silicon-Septum N 11, weich AD: 11 mm, Thickness: 3 mm 50/PAK
Silicon-Septum N 11, weich AD: 11 mm, Thickness: 3 mm 50/PAK
Item number: MN702604
Brand: Macherey-Nagel
$73.90
Product Image of septa for 40 ml Vials PreCrossLabeaned 72 pc/PAK
septa for 40 ml Vials PreCrossLabeaned 72 pc/PAK
Item number: AG5183-4743
Brand: Agilent Technologies
$148.00
Product Image of Virgin PTFE septa, 0.010, 12 mm diameter, 1000 pc/PAK
Virgin PTFE septa, 0.010, 12 mm diameter, 1000 pc/PAK
Item number: AG5183-4459
Brand: Agilent Technologies
$58.00
Product Image of Red PTFE/Si cone septa, 8 mm diameter, 100 pc/PAK, for 8-425 screw top vials
Red PTFE/Si cone septa, 8 mm diameter, 100 pc/PAK, for 8-425 screw top vials
Item number: AG5183-4437
Brand: Agilent Technologies
$26.20
Product Image of Red PTFE/Si/Red PTFE septa, 8 mm diameter, 100pc/PAK, for 8-425 screw
Red PTFE/Si/Red PTFE septa, 8 mm diameter, 100pc/PAK, for 8-425 screw
Item number: AG5183-4436
Brand: Agilent Technologies
$36.45
Product Image of septa for screw top caps, certified, PTFE/White silicone/red PTFE, 100 pc/PAK
septa for screw top caps, certified, PTFE/White silicone/red PTFE, 100 pc/PAK
Item number: AG5182-0729
Brand: Agilent Technologies
$39.00
Product Image of 3/8'' HiTEMP Green Septa, 50/PAK
3/8'' HiTEMP Green Septa, 50/PAK
Item number: OV246124
Brand: Ohio Valley
$76.00
Product Image of Septa for 6 ml Vials, 100 pc/PAK
Septa for 6 ml Vials, 100 pc/PAK
Item number: AG9301-1378
Brand: Agilent Technologies
$58.45
Product Image of Septa, PTFE/natural rubber, for 4 ml Vials, 144 pc/PAK
Septa, PTFE/natural rubber, for 4 ml Vials, 144 pc/PAK
Item number: AG9301-1031
Brand: Agilent Technologies
$45.85
Product Image of CrossLab vial septa 22mm diameter, pre-slit PTFE/silicone 100pc/PAK
CrossLab vial septa 22mm diameter, pre-slit PTFE/silicone 100pc/PAK
Item number: AG8010-0564
Brand: Agilent Technologies
$41.35

Items 201-250 of 255

Properties and applications of septa made of TEF, PTFE, butyl, silicone etc.

Material Application area
Natural rubber
  • Standard quality for HPLC
  • Good reclosure properties for multiple injections
  • Relatively inexpensive
  • Temperature resistant from -40 ° C to 120 ° C
  • Not very clean as a natural product
  • Punching discs (punched from sheet / roll material
 		HPLC/GC
RedRubber / PTFE (synthetic rubber)
  • New standard quality for HPLC and GC
  • Synthetic rubber, cleaner and softer than natural rubber
  • Relatively inexpensive
  • Temperature resistant from -40 ° C to 110 ° C
  • Punching discs (punched from sheet / roll material)
 		HPLC/GC
Butyl (septa / stopper)
  • In the absence of a PTFE coating, only for uncritical analyzes
  • Butyl as a synthetic rubber cleaner than natural rubber
  • Very cheap as there is no PTFE coating
  • Application examples: breweries, blood alcohol analyzes
  • Original Butyl stopper for PerkinElmer
  • Forming discs (vulcanized and formed in a mold)
 		Headspace
Pharma-Fix Septum Butyl / PTFE
  • Specialty: Pharma-Fix washer only centric PTFE-coated butyl disc; The elastic butyl lying on the glass edge achieves a significantly better seal than the slippery surface of a completely laminated sealing disc
  • Butyl as a synthetic rubber cleaner than natural rubber
  • Relatively inexpensive compared to silicone
  • Temperature resistant from -40 ° C to 120 ° C
  • Synthetic rubber has poorer reclosure properties than natural rubber
  • Forming discs (vulcanized and formed in a mold)
 		GC/HPLC/Headspace
(PTFE /) silicone / PTFE
  • Silicone is the purest synthetic elastomer and is therefore used for critical analyzes
  • Temperature resistant from -60 ° C to 200 ° C
  • Improved reclosure properties than NK / TEF as a synthetic elastomer
  • (segmented) septa in HPLC as penetration aids for thick / blunt needles and for producing a valve effect in the case of multiple injections
  • Specialty: PTFE-coated silicone washers on both sides for low particle formation
  • punching discs (punched from sheet / roll material)
 		GC/HPLC/Headspace
Silicon / aluminum foil
  • All chemical and physical properties, such as silicone / PTFE
  • However, slightly higher temperature resistance from -60 ° C to 220 ° C
  • Frequently on PerkinElmer devices
  • More expensive than PTFE-coated septa
 		Headspace
Pure PTFE septa
  • Very inert, therefore also as a coating on most other sealing discs
  • No elastomer
    → No sealing
    → No reclosing properties
  • Do not press-fit into caps; Are therefore often only sold unassembled
  • Very cheap
  • Only for very uncritical applications
  • Are often used on VWR (Merck) / Hitachi and Waters instruments
 		HPLC

Durometer (hardness of the septum)

Durometer is the hardness of a septum, expressed in ° shore. The higher the "shore" number, the harder the septum, the lower the "shore" number, the softer the septum. The softest sealing disc is 45 ° shore A and the hardest 70 ° shore A is hard. In addition to the thickness of the disc, the hardness is an important indicator, which septum is suitable for the penetration of a certain needles (sensitive needles, thin or thick needles, pointed or blunt needles, etc.).