Concrete Terrazzo Epoxy Floor Coatings - Installation Techniques

Epoxy terrazzo can be installed over most clean, properly prepared concrete slabs. Most manufacturers recommend applying a primer first to improve the epoxy/concrete bond.

Installers mix the two-component epoxy resin with the desired decorative aggregate and then pour the material onto the slab. If different colors of terrazzo mix are used, the sections are separated by divider strips made of zinc, brass, or other materials. The dividers not only delineate the design, they also are used at control and expansion joints in the concrete slab to help prevent the terrazzo topping from cracking due to joint movement. Thin and flexible, the divider strips can be bent by hand on the jobsite or preshaped in the factory into intricate designs. They are usually affixed to the slab with an epoxy adhesive.

Installers trowel the epoxy mixture to the top of the strips and then allow it to cure overnight (or at least 18 hours). The next day, they mechanically grind and polish the surface using progressively finer-grit abrasives to reveal the natural beauty of the decorative aggregate. The final step is to apply a sealer, which makes the surface more resistant to water, chemicals, oil, grease, acids, and solvents.

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