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A long time ago I got ahold of some gortex thread and gave it a try on a rod. No matter what I did the epoxy-rodbond and flexcoat both pooled up. so for the heck of it I sent both a sample of the thread. The reply was that silicone is used as the release agent for many hi tec threads and plastic containers. Once it gets on the coated surface the epoxy will not bond there at all. They told me to try a different batch of mixing cups and do another test on a section of the thread to see what happens. They also sent me some new finish to use in my test. Low an behold it was the mixing cups that had the silicone on them. I stopped using those cups and went back to the ones I used before. No more problems. Haven't had a separation or bonding problem on a rod or a plug since then. I only use cups that come from rod shops or medical supply houses. Both are silicone free. Never from a craft shop. Hope this helps. Ron
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