Take the 2-minute tour ×
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free, no registration required.

I am a first year undergrad working in a lab, and I have these Plexiglass containers that I tried to convert to dessicators, since the commercial bell jars are really expensive. I used these weather strips from a hardwarestore that are suppose to be moisture tight, and sealed the connections with silicone. The craftmanship is kind of poor, but I am pretty sure there are no leaks in the silicone seal. Then I used some vacuum grease between the strip and the glass. I have these containers connected and have N2 flowing through. However, even though there is gas flowing through, moisture indicators still showed (after a few of days) that the last couple boxes are not sealing properly.

I was wondering if you guys have any ideas on improving the seals, or improving the system in general to help prolonging the period which the containers can seal properly.

Couldn't post any images since I'm new here =(

share|improve this question
    
Vaguely related: physics.stackexchange.com/questions/44784/… –  dmckee Feb 1 '13 at 23:58
    
The first thing that comes to mind is better craftsmanship and them more sealant---just slather it on there, you are not getting graded on neatness are you? –  dmckee Feb 2 '13 at 0:02

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.