Grouting and Grout sealer - advice needed

[T1berious]

Good morning!

I'm hoping this is the right place to post. So I'm going to grout the bathroom floor (again). I religiously mixed up the grout as per the instructions (the floor tiles 600x600 thankfully) and applied, washed, polished the tiles and it was fine for a bit but then the cracks started to form and bits started work loose.

Sigh...

Additional details, the floor isn't as solid as it could be (I'm considering flexible grout?) It's a Victorian house, so there's movement.

Used Mapei Ultracolour Plus Tile Grout Silver Grey (111). bizarrely I've used the same grout in the en suite and its all fine 2 years later. no issues.

So any advice greatly received. Any grout sealer recommendations would be helpful.

Cheers

T1b

[Simpo Two]

It needs to be flexible.

I would have a word with BAL: https://www.bal-adhesives.com/tilers-home/products...

[T1berious]

Simpo Two said:

It needs to be flexible.

I would have a word with BAL: https://www.bal-adhesives.com/tilers-home/products...

Cheers. Thanks for the advice, think Mapei do a flexible grout.

[OutInTheShed]

Many moons ago, we have a balcony with ceramic tiles.
The flexible grout didn't last well, so I used a polyurethane sealant instead.

[ScubaBiker]

I would agree with the BAL suggestion. Either their products or Ardex (same company) - one of their flexible grouts should work. As a default I would suggest Flex-FS, but worth checking with their helpline.