I have not used this product. I have read many posts on various forums. From everything that I've read and all the products that I've compared, the cost of using RockSolid or Rust Oleum is nearly the same as using a better epoxy product with a urethane clear coat.
The RockSolid directions say that porous concrete may "drink up" the coating. In those cases the coating should not be stretched but instead purchase 1 or 2 extra kits depending on the size of the floor to be covered. Well think about it, all the pros on this site suggest diamond profiling the concrete floor for proper porosity to get proper adhesion. So with a porous floor, expect to need the extra 1 or 2 kits.
1 kit covers 250 square feet but they do not specify the thickness of the coating, at least I cannot find the answer. The kit is on sale at Menards right now for $99. The clear coat covers 250 square feet but not sure the mil thickness either. The cost is $124 right now. So a 2 car garage of about 500 square feet is going to use at least 2 kits of the base and 2 kits of the clear, which comes to $446.
Now if your floor "drinks up" the coating, then you end up having to spend another $99-$198 for 1 or 2 extra kits. You can see that on a 500 square foot floor, the cost is adding up.
You could opt for 100% solids product such as Epoxy-Coat from Lowe's, a kit that includes 3 gallons of base and 3 gallons of clear for $430.95. Here's the link:
http://www.lowes.com/pd_546042-2137...at&pl=1¤tURL=?Ntt=epoxy-coat&facetInfo=
With the above kit, you would get 9.6 mil of base coat at 500 square feet and then another 9.6 mil of clear coat at 500 square feet. This assumes ideal conditions and no waste. But even with the 10% waste that Fred factors into his Wolverine kits, you should be able to put down a total of thickness of 17 mils over 500 square feet for $430.95 + tax. This seems like a better deal to me.
I am not affiliated with Epoxy-Coat in any way. And I have not used their product. I have read a lot of forum posts from people who were happy or had some problems but Christine at Epoxy-Coat helped them out.
I'm actually looking at using a product from Versatile Building Products for my floor, though I haven't made my final decision yet. I'm looking at Versatile because they're focus with the chip floors is applying the chip or some people say flake to rejection, meaning covering the base coat completely. This requires a lot more chip. With their system, the chip is sold more affordably, so the overall cost is good. Other suppliers charge more for their chip. I might consider Epoxy-Coat as a viable option if the cost of bulk chip through them were more affordable.