Bob Harris returns to instruct the “Duraamen How-to Video Series” with Duraamen’s new Terrazzi Sprayable Microcement System. This video series demonstrates how easy and cost-effective it is to install a polished concrete floor using our patented Terrazzi Concrete Sprayer.
Spraying a microcement using the Terrazzi Sprayable Microcement System has several advantages compared to applying a micro-cement with traditional means. You can cover much larger areas in a shorter time with our sprayer. When using a hand towel, magic trowel, or large squeegee, it takes much longer to spread out the material. Moreover, even experienced artisans sometimes leave trowel marks on the finished surface using these methods. Duraamen’s Sprayable Microcement System eliminates trowel marks and smoothing lines, resulting in a flawless surface.
On areas as large as 20,000 sq ft, contractors will benefit from a reduction in labor costs when using sprayable concrete. It’s possible to install a large polished concrete floor with only two installers. One craftsman would be spraying while the second broadcast the aggregate.
Another excellent feature of this system is that the finished floor has the look of traditional polished concrete—a subtle salt and pepper-colored appearance that appears very natural.
This system is also useful for hiding imperfections on newly applied self-leveling concrete. Old and worn concrete may have cracks, spawls, or divets, and need a thicker self-leveling cement product installed first. The issue with a thick self-leveling cement is that the finished surface may contain traces of roller spike marks or smoothing lines. Eliminating these imperfections is simply a matter of recoating the surface with Arapido microcement using the Terrazzi Sprayer.
Gypsum is not a problem for the Terrazzi Sprayable Microcement System. When installing over gypsum, make sure you test the gypsum’s strength. It should be a minimum of 3500 psi. You may be able to tell by hitting the surface with a hammer. If the gypsum doesn’t mark with a hammer blow, you can most likely apply polished concrete directly over it.
After you’ve sprayed the microcement, and the material has fully cured (typically 24-hours), you may choose to use a swing buffer with a 100 grit honeycomb diamond pad to polish the surface. After polishing, vacuum, and mop the surface.
Lastly, apply your choice of topcoat or concrete floor sealer. The video shows Bob using our Perdure U90 topcoat/sealer. Perdure U90 is a high solid, polyurethane coating. For a more economical or odor-free topcoat solution, we suggest using our excellent Perdure A03 acrylic concrete floor sealer.
This sprayable cement technology will make a tremendous impact on the polished concrete industry.