DualSeal

In December 2017, we introduced our newly developed double cap system "DualSeal" for moisture/oxygen sensitive products allowing you to keep them in good condition until the last drop. We will continuously increase our usage of DualSeal across our product portfolio. Click here for examples of products using DualSeal

• Air-sensitive reagents can be safely dispensed without exposure to air.
• Even after piercing the septum cap, the PTFE sheet on the blue cover cap provides sealing protection.
• Easy to dispose of caps and bottles separately.

The blue cap has a convex structure on the inside.
By filling the space where air and moisture stay, the material is protected from moisture and oxygen even after piercing the septum cap with a needle.

The white septum cap has a wide septum surface for ease of use, and features two layers of rubber and a highly chemically resistant PTFE seal.
The septum cap body is made of polypropylene and contains a screw thread allowing for easy removal from the bottle. The septum cap is closed with high torque to ensure an airtight seal.
The rubber portion (gray) is made of two layers: butyl rubber for good sealing and PTFE for high chemical resistance. The butyl rubber layer is weak against halogenated solvents such as dichloromethane.

1. Clamp and secure the reagent bottle before opening.
2. Carefully unscrew the blue outer cap only. Place the cap near the bottle while in use.
3. To prevent air from entering the container, insert a needle with a balloon filled with an inert gas such as argon or nitrogen. Then insert a syringe needle through the septum surface of the white cap.
   
4. Fill the syringe with the required amount of liquid.
5. Remove the syringe, inject the liquid into your reaction vessel and safely dispose of the needle.
6. Take the blue cap and screw it tightly back in place.
7. Unclamp the DualSeal bottle and place it in its proper storage location.