When I do cross-stitch I wax my thread, which makes it easier to get onto the needle and in my opinion causes fewer tangles. I use plain beeswax, and I've had the same puck (bought from Yankee Candle) for years because you don't need much wax for thread. But the puck was finally getting a little fragile and I wanted to have separate pucks for separate projects anyway. So I busted out my wax sealing kit and melted the puck into three separate round molds, then when they were cool I sealed the top of each with a different stamp.
The sealing wax is the new "supple" wax which is mostly vinyl polymer (think hot glue, but nicer) so it can't be used to wax the thread, but it's a good reinforcement for the beeswax, which tends to get deep grooves and then crumble. And I think they look quite nice, too.
