specific material for a water gasket

[the beginner]

I might have titled this wrong. but I know some one in the engineering field has the answer to the material i am searching for. I am trying to find the name of a material that will hold water, but will allow me to penetrate it repeatedly with a syringe. When I say gasket, it is a lose term. I want to capture water or a liquid that will not be toxic, inbetween two pieces of this material, while being able to reach through both of these materials and liquid and extract substance with a syringe on the other side. The substance is small, about 25 microns. And since it will escape anyting that is not air tight, I am attempting to create a water gasket so to say. please give me any advice that is on topic. Maybe this gasket has a name and has been done before. I am a beginner so please be thurough.

 

 

[Externet]

Hi.

Welcome to the forum.

Do some research on Hylomar applications, it could form/make the gasket you are after.

[skyhook]

Is Bostik Blu- tack usable ? Recently, someone told me he can use a syringe to inject water through the polymer. but I suppose after withdrawing the needle, I've to press down on the needle hole to seal it.

Edited September 7, 2010 by skyhook

[John Cuthber]

Is what you are looking for a septum seal?

Most of the ones I use are silicone rubber with an inert PTFE layer.

[Jamus]

Dear Beginner,

 

 

Typically we use neoprene or EPDM rubbers with water.

 

The material you require, I believe, is a PTFE gasket material - although a specialist 'self-healing' grade.

 

Hope this helps,

 

Jamus