If you are concerned about biocompatibility and your device can take temperatures up to 325-350C you might try using polyimide as an epoxy. This has worked for us in the past. -Michael Martin U. of Louisville >>> "Ciro Chiappini"7/24/2007 12:31 PM >>> Thank you Gareth, Kirth and Nichols. We are currently gluing the capillaries with siliconic glue since we are concerned about biocompatibility of epoxy, unfortunately the siliconic glue does not provide sufficient sealing. We are just looking to some literature to find out whether epoxy is compatible with our procedures or not.