Adding either natural stone or glass aggregate to a polished countertop can enhance the overall appearance of any concrete countertop. Direct Colors offers both Size #1 (5mm-10mm) and Size #2 (10mm-15mm) aggregates in seven varieties. For pre-cast countertops, set up forms and trowel in a thin layer of countertop mix on the surface of the form. Broadcast the desired amount of aggregate onto the mix and press into place with a trowel or float. Apply an additional 1/4 in. of countertop mix, vibrate and add reinforcement.
For poured-in-place countertops after pouring and floating, broadcast the desired amount of aggregate onto the surface and trowel in. After waiting for the necessary curing period, begin polishing with a 100-grit pad to expose the aggregate and continue working the surface with up to a 3000-grit pad for the smoothest possible appearance.