Zap-a-Gap Debonderavailable at many fly (FLY FISHING) shops.
You could try Kaufmann's Streamborn on line; The Fly Shop on line; Cabela's on line.....
Works okay if you get to the fused area QUICKLY and LIBERALLY.
I recommend buying like three bottles whenever you find it.
That glue is serious stuff regardless. A commitment. Ties incredibly tough flies.
*****WEAR EYE PROTECTION WHEN USING ZAP-A-GAP AND OTHER CYANO GLUES*****