I grouted 5 bathroom floors and 2 showers in about ten hours including base tile. Good luck doing this with a trowel. Instead of using a regular caulking trowel, use a rubber trowel or better yet, a Bondo trowel/caulking paint and then a sponge. You still need to make small areas as instructed. No waste as excess material is quickly removed and returned to the bucket for reuse. Not for use with water mixtures.
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