I've been trying to find a cement additive to change the color of some mortar, but only seem to be able to find it in liquid form at my local big-box hardware store.
I'm looking for a similar product that can be added to dry mortar mix. Does this even exist? Where can I find it?
Back-story: I put down a patio of pavers a few years ago and apparently didn't put down thick enough plastic sheeting underneath. I skimped because the area seemed too shady to promote much weed growth. Boy was I wrong. I have major weeds growing through the cracks between the pavers.
My plan is to power wash the patio to get most of the sand out between the pavers, and then replace it by sweeping dry mortar over the patio and then misting it so it will harden and form a barrier for the weeds between the pavers. To get the color right I'd need to mix the color into the dry mortar before spreading it. I'm not sure how well this will work, but I am going to try on a small area first to see how it goes. If anyone sees any major pitfalls with this plan, please speak up in the comments.