Well, at the moment, in Central Texas, moisture trapping isn't a big deal.... it's been wet all year so far... and big rains again today. However, typically, soil moisture is sadly lacking.... deep down... cracks sometimes more than a foot into the clay soil... So, I'd think it tough to get this to be really effective, particularly in Houston Black Clay... I'm willing to learn, but am putting my money on toiyabe, who sounds like he's up on his soil stabilization products.