How to Build a Polished Concrete Desk

Step 7 Grind and fill holes

Even if your slab has as many holes and voids as mine, the first thing you need to do is grind away the surface and expose the glass and embedded objects. The point of this is to get rid of the spry adhesive residue and stuff on the surface and to open up the tops of the holes to make it easier to fill them. Don't wear anything you don't want to get covered with concrete mud!
Next, let the slab dry and mix up some pure cement with some pure acrylic fortifier, until it is smooth and about the consistency of a shake. If it doesn't pour easily it is too thick. I found doing it in three stages worked best, as the stuff likes to shrink as it dries. spread one coat evenly over the surface, working it into the holes and voids. let it dry a bit until it has set up pretty well, then scrape all of the extra off of the surface. now repeat this process, filling in any holes you missed or holes that didnt fill all the way. Lastly repeat again, but do not scape off the extra. leave a layer of the mix on the surface in case it shrinks more than expected. let this cure overnight,then grind it off with the roughest polishing pad, probably 50 or 100 grit. inspect for any holes that didn't take the patch material well, and repeat the process if necessary. Surface should feel smooth, and the filled holes may be darker.

Comments

[mastamuzz]

I recommend using a styrofoam for this part just let it sit for a while and start rubbing in a circular motion so you fill the holes, that is called sacking is faster and better than just smudging!

[CapnChkn]

If, like me, we have never eaten a milkshake in our entire lives, can you give us a different comparison? Peanut Butter? Vegimite? Pat`e? 1, 2, or 3 finger Poi?

[Chewie42]

i am very sorry you have never had a milkshake..

[hivoltage]

hmm, peanut butter is much too thick, and my first hand experiences with the other foods are lacking. I would say maybe a little thinner than cake batter, or about the consistency of ketchup or mustard.

[LittleMonkeyMojo]

Maybe like thin Hummus.