Grout Fine hairline cracks in grout - advice please

[Albert]

can you actually get a rapid setting tubbed adhesive??

I think B+Q did one years ago it took days to go off
[automerge]1589019451[/automerge]
The cracks look a bit like shrinkage

 

[Ajax123]

can you actually get a rapid setting tubbed adhesive??

I suppose if it's on bonding the suction will dry it out very fast...