Mapei tile adhesive together withgrey and black/charcoal grout (Flintshire CH1)

10 kg of rapid set adhesive bought and opened a few days ago. Approx 1 kg grey grout opened awhile ago but used a few days ago without problem. I've also got an old but unopened 2.5kg bag of mapei charcoal grout that's been stored in a warm and dry airing cupboard so should be fine to use. Collection from Sealand road