Length - 04:31 Decorative concrete contractors often engrave graphics into the concrete surface. The engraving tools of choice for most decorative applications are either the Barracuda or the Shark. Each tool is air-driven, meaning they require an air compressor to operate. You need an air compressor with the capacity of 10 to 12 CFM and a maximum capacity of 90 to 100 pounds pressure. Be cautious about using gas powered air compressors indoors or near combustible materials. Before turning on the air compressor make sure there is proper ventilation. These tools can be used in both a freehand form as well as with reusable polyurethane templates available from the engraving tool manufacturer. When using templates, pre-stain the area in which a pattern will be engraved. Then use the engraving tools to chisel a relief in the concrete surface. Wear the right safety equipment when using these high performance tools: eye protection, ear protection and a dust mask are all musts.
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