I dunno? I use the little blue UV light thingy and a few seconds under that and the stuff is rock solid. It's supposed to be faster in the sunlight, but sunlight is a premium here in Upstate NY. When it exists I try to enjoy it and NOT tie flies.

I re-read you post. Did you try taking it outside into sunlight or have you just been counting on stray UV rays indoors? It reuires UV light to harden..so I'd at least put the knots in the window.

[This message has been edited by LWilliams (edited 01 March 2005).]