I really don't know but if you study the pages of their web site and read the comments from those who have used it, it's great stuff and reasonably priced. I will be ordering up 1000 sq. ft. worth next week at a cost of around 600 dollars total. I plan on prepping and applying myself with some help from a friend. My construction is new, concrete floor is about 3 months old as it was poured during early part of construction. If you look at the comparison charts, it beats several others that cost more in terms of thickness after drying. I will post up pics and a write-up of final application...
