I just recoated our stamped concrete patio with SX5000. I originally applied it 2+ years ago because the top surface of the concrete was beginning to flake off due to the harsh winter freeze/thaw cycles we get in northern New Hampshire. The product went on easy, stopped the winter concrete flaking, and didn't seem to make the concrete more slippery when it rained. I might have been able to go another year or more before recoating, but I didn't want to risk more freeze/thaw damage to the patio by waiting.