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NT Series (Low Bleed Silicone Septa)

Low Bleed Silicone SeptaThe NT Series of silicone septa serves many applications - from environmental bottle liners to HPLC and GC vial septa. The NT is known primarily for its low bleed characteristics and comes pigment free. Independent testing has shown a 60% improvement in general bleed over standard septa.

NT septa can be supplied loose, press fit into closures, or bonded using an adhesive-free bonding process. Only the highest quality silicone elastomers are used to ensure proper re-sealability and to minimize coring. Various film types such as PTFE and FEP may be used to maximize chemical resistance.

Key Features Product Benefits  
• Low Bleed • Excellent Re-sealability  
• Addition Cured Silicone Polymer • Resists Coring  
• Low Compression Set for Storage Reliability • Intended for Multiple Injections  
• Excellent Physical Properties    
Typical Applications  
• 8-13mm HPLC and GC Vial Septa  
• 24-110mm Bottle Liners  
• 24mm VOA Vial Septa  
Technical Information  
Silicone Septa Physical Properties  
Thickness: 0.010" to 0.125" (3mm)  
Durometer: (Shore A): 40-60  
Color: Clear, White, Custom Colors  
Tensile Strength (ppi): 1250  
Elongation (%): 500  
Tear Strength (Die C): 120  
Note: these results are typical for our NT series compounds and may vary slightly depending on exact formulation used.  
Film Types  Closures  
PTFE: Thickness Range 0.002" to 0.010" Polypropylene: 8mm to 13mm  
Colors: Natural, White, Red Colors: Black, Blue, Yellow, Custom Colors Available  
FEP: Thickness Range 0.002" to 0.010"  Polyethylene: 11mm Snap Cap  
Color: Clear Colors: Natural, Red, Blue, Custom Colors Available  
ETFE: Thickness Range 0.002" to 0.010" Aluminum: 11mm Crimp Cap  
Color: Clear Colors: Silver, Red, Blue, Custom Colors Available  
  Magnetic: 18 Screw Tin and 20mm Crimp Cap  
Insert Type Colors: Silver, Red, Blue   
Press Fit    
Additional Options  
Custom Packaging  
Pre-Slitting Available