Wht kind of epoxy to mix with river rock for a patio?

I saw on DIY network that you can mix epoxy wiht rover rock to make a patio floor around pool area. It didn't say what kind of epoxy. I went to lowes and asked them but they didnt' seem to know what I was talking about. I did notice two types of epoxy that they carried. One was an epoxy paint that goes over concrete (it was gray colored). The other was a gallon of "lock down epoxy". Is that lock down epoxy what I need to mix with the river rock? Or is there some other kind. If so, what is the exact name of the stuff. I think it has a slight brown tinge color to it and it basically gets mixed with the river rock and smashed down flat to harden into a flat looking river rock floor. Also, about how much epoxy is mixed with how much river rock to harden to a good consistency? Thanks in advance.