Cleaning a driveway with caulking in the cracks

Hey all I have a client who wants her driveway and sidewalks cleaned and sealed. But her driveway has cracks with some type of epoxy in them thats a few years old. It seems to be in fairly good shape still and not loose but I’m afraid once the surface cleaner gets ahold of it they wont be. Has anyone ran into this? If so what happened to the caulking once you started cleaning?

I’ve came across a few of these before. As long a it isn’t deteriorating yet, you will be fine. Test a portion by the edge to be sure. Worst case scenario, put a wide fan tip on wand and do those spot’s without surface cleaner. From the picture, that caulking material looks to be in good shape. But notify customer that it could come up, just to be on the safe side.

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Thanks for the tips much appreciated.