About $20 per 50lb bag. I used one bag per 9 square feet of pavers.
The maximum size is 2".
1/8 th inch
No, it will not stain or haze the paver's surface.
nope to big a gap for sand / rock / use thinner like 1/2 inch or less perhaps plywood just stake behind it if its the outside border every 2 feet or so
Yes, the only color option available on this product is tan.