The kitchen shown above is my rental property. Below is my house and I did these countertops about 5 years ago. These have the epoxy sealer on them as well as the concrete dyed charcoal before pouring. I added stain after curing and was trying to add veining for a natural look but the concrete was too dark so I gave up and settled on pure black. This is why I did not add any tint to my current project. (note: photos below are a little dirty, in reality, it's a very smooth black)