I went over to my friend Bronnie's place. She's been renovating her bathroom and in the morning had the tiler over to grout the tiles around the bath. He put too much water in the mix and had to leave it. "It'll be right in 2 hours," he said and showed Bronnie how to apply it. That was at about 11am. Hahaha, by about 7pm it was cured enough to use. By then we were well into our second bottle of champers. But, with a little help, she managed to get the job done.