Hello everyone. I was try to cure an epoxy insultaed electronic circuit into a PDMS made device. The PDMS prepolymer attaching to the epoxy will never be cured. the process flow is: 1. coat the circuit with epoxy prepolyer, and let it dry 2. insert the circuit to the slot made by cured PDMS 3. enclose the open area with PDMS preploymer (10:1 with curing agent) 4. put it on a hotplate (70 C) For hours, the PDMS prepolymer kissing the epoxy is still in viscous liquid state. The epoxy coating is a necessary step to prevent Lead diffusion into PDMS or short connect of the circuit I am looking for any suggestions. Hong