Natural Toothpaste

It's been a few months since I made the switch to a more natural brand of toothpaste, and I must admit I'm a fan. I used Colgate for years, but now I am sickened by the sweetness of it. The stuff I'm using now is by Tom's of Maine. It contains silica, which tastes a bit like a sealant. I haven't tasted it before, but if you've smelled the sealer they use on windows, you know what I mean.