Cement Cloth Planters Go to the hardware store and buy a bag of cement, its in powder form. Take it home scoop some out and add water until it is the thickness that you want. Just like onion ring batter. Approximately a 1:4 water/cement ratio. You may also want to put some drainage holes in the planter before it completely hardens to prevent cracking. You may also want to apply a couple coats of cement sealer after the planter is dry. This is also nice due to the fact there is so many colored cement sealers now so your planter may be colored to want you would like.