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Planning to re do joint sand in patios. Going to remove as much of the existing sand with compressed air or knife and vacuum up what comes out. Joints are quite wide. My question is what to use as replacement. The existing joints are sand that had been “hardened” with a sealer product. The resultant joints were quite flexible, but the sealer only penetrated the joints about 1/2 inch. So ants and weeds have taken over during the past 8 years. Unsure if I should redo as it was originally or to use modified joint sand. Any comments on what would resist ants/weeds the best?