I've laid a lot of slate tile in my bathroom, including a walk-in shower, backsplash, and bathroom floor. The local tile shop sells this product:
http://www.tileshop.com/products/det...36&pageIndex=1
It is a "wet look" sealer that supposedly provides 20 year performance. My wife and I definately want to enhance the look of the slate and provide a good seal as well. I have been told that two coats are suggested. It is $85/quart.

I anticipate needing at least three quarts.
I have a hunch that I'm paying a lot of markup?
Does anyone have experience with any other brand of slate/stone sealer that might be available online? $85/quart feels like a rip-off...Maybe it isn't?