I used fine sand and the gluemasters thin glue. Easy, quick and got some cool designs.
Now, I will say the glue area will get hot for a bit. Use thicker gloves. On my live rock joint I sort of ditched the gloves and dropped some glue on my finger. No, not on purpose. Felt like a quick burn from oven, but the glue dried and peeled off easy. No harm done, just do not recommend no gloves.
White is the dry stuff added to tank.