no, the jbweld is not for grout. i invented a new use. stupidly, i wrote and relinquished all my rights. my cousin said i could have made a lot of money. he is a patent and copyright expert. i felt very stupid later. it looks cool and your tiles will outlast your house. i never had to clean it. it is kind of expensive to do and i have not done the place where i am at yet. if you do it, i suggest you buy the bigger tubes, not the small ones. use masking tape to mask it off. it drys hard like steal. make up has some of the worst chemicals ever, and remember Tammy faye died of cancer: http://youtube.com/watch?v=Inm6J1lzqBI
someone told me about neways. it is an MLM, so try to ignore that. but i hear they have safe products.