Back pool deck had numerous cracks. Watched Youtube videos to find out how to repair concrete cracks prior to painting. I purchased an angle grinder, goggles and paper dust cover, as I knew there would be a lot of dust. The grinding wheel is tapered and easily followed even small hairline cracks. I wanted to open the cracks wide enough to provide room for quick set concrete fill. This grinder wheel needed no pressure to open the cracks to a tapered width of about 1/4" and a depth of about 3/8". You need eye and breathing protection as grinding creates a lot of dust. I could see no wear to the grinding wheel after tracing over 100' of concrete cracks. Just be careful with the angle grinder.
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