The stoppers guarantee absolute impermeability, even when the edges of the tubes or glass, metal or plastic containers to be sealed are imperfect. They can be punctured and resealed after sampling, even after several uses.
- Outstanding sealing and protection from the outside
- Can be perforated
Natural rubber:
- Economical
- White
Silicone:
- Biologically neutral, good chemical resistance
- Translucent
- Autoclaved
- Resistant to ageing, ozone and repeated sterilisation
- Resistant to temperatures from -60 to +220 °C (up to +250 °C for short periods)
