Over time it will wash away and has at my house. Just get a couple bags of quickcrete mortar and spray it down. Same technique but stronger. Has worked well for me when using for washout areas
I can't help with the sq ft question, but I do advise being careful about the colors. I learned the hard way that Permasand's tan and beige colors are slightly different, so be sure to check the labels.
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yes this is available in gray
Thank you for your question. Sakrete Paver Sand only “REDUCES WEED GROWTH.” Water activates the polymer in the material which allows it to harden. Weeds will need to be addressed in the preparation process. Hope that helps. Please contact us at 1-866-256-7404 if you have any other questions that we can resolve to your satisfaction.
The sand will get hard, now if it gets constantly wet it will get moist but it shall hold against weeds and blowing away.
Yes. Comes in grey or beige.
Well, depending how big of a gap you have you made need two. First try one, when you pour, make different mounds through out the targeted area and save some. Use a push broom to get it in there and make the sand flush with the top of the brick. Use what is left to fill areas that may need extra, this will tell you if you need a second tub. Water in every time you water your grass or garden eventually the sand will harden which will then make that area grass and weed free.
From the Sakrete website: You will need to restrict pedestrian traffic for 24 hours and vehicular traffic for 72 hours. The exact amount of time will vary with weather conditions. The hotter and dryer the faster it will cure.
If you have a nice sand base it would seem that it would hold up fine based on our bricks, we used this when we initially placed our pavers, then used it to touch up spots that have settled.