Glitter and Tire Sealant - Does it work?

I've had a slow leak in the rear tire of my hardtail for months now, and I keep just pumping it up and riding it. I think we've all been guilty of this type of laziness, but this leak is coming from my sidewall, which means the tire really needs to be replaced. When I pump it up you can see air coming out here, but shaking the sealant around plugs the hole for a while. Later today, the pressure will be down to around 10psi if I'm lucky. So, while this tire is getting replaced no matter what, I'm going to use this slow leak for an experiment. - Seth