2.2 kg black grout

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Does anyone need a bit of black grout for a small repair job? I did, and this was the smallest bag I could find at the time - a 3kg bag of Unibond Rapid Set - the kind you have to mix yourself. I've used just less than a third of it, and (according to my scales), there is approximately 2.2 kg of the dry powder left in the bag. It was easy to mix, simple to apply, and gives a nice result - BUT I don't need the rest of the bag! Rather than chuck it in my cupboard to gather dust for the next 10 years, I would prefer to pass it on. Does anyone have any use for 2.2 kg of decent black grout?