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That's a good idea. I was wondering if there would be something like that in a gun that's easy to apply.
hugo7-
Don't Go running round your driveway with a caulking gun thinking it'll sort this detailing out - I'm sure there are (bullnose) edge pavers that would resolve the paving better - or any other number of questionable ideas, chipping the hard corners off or having the soil vegetation grow into it..
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I'm wasn't wanting to say this won't work but at the time I thought it'll have you looking a bit crazy - especially using something so sticky while there's a fair bit of sand to get out of the way, if it had to be from a tube, have you ever used gripfill solvent - it's gray much thicker and cures hard so if any slips happen just leave it to go hard and then remove it
bluehuw
Little blob of high modulous silicone or exterior frame sealant?
Get grey or sand colour.