Well. If it helps, heres the torch I use on all my patios and my brick walkway. I just burn em all then sweep or blow them away. I only have to do it once per year and its instant gratification. No waiting for chemicals to soak in.
https://www.northerntool.com/shop/to...RoCSXUQAvD_BwE
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Cooperino 100, 104,125, 126, 2x129's, 804, 1211, 1641
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