The UV cement I use cures in full sun in 15-20 minutes (unless you put it on too thick). My bench light is flourescent...and up close there is enough UV output to start the curing process...so, I apply with the windows closed, and incandescent or LED light. First, try not to have any excess...but if you do, don't try to wipe it until its cured. Once cured, clean excess off with acetone on a buff stick. If you want to verify that whatever UV source you are using has adequately cured the cement, put a few dots on the old crystal and set it in the same source as the case...when the dots are cured, the new crystal is cured. Be neat...once the new crystal is cured, it will be more difficult to remove than the tradional G-S or Rocket crystal cement products! (BTW...best removal results for UV cement seem to be with heat...I like an electrical shrink-tube heater).
