Sit the mixture for three to four minutes to make sure the components are combined into a smooth paste.
Once the grout is well mixed, it’s time to add the Mapei glitter. This is the moment we’ve all been waiting for!
The site reads: “You can add one to three sachets of the glitter, but we recommend two sachets for the best glitter results!
“Empty the sachets into the tub of grout and work well into the mix, folding in the glitter with a spatula.
“Using the mechanical stirrer on the same slow setting, mix the glitter slowly into the grout mixture to ensure the glitter is dispersed evenly throughout the product.”
source: express.co.uk