Does anyone know what type of grout this is?

[EA69SYU]

Some has come away when jet washing but I’m not sure what to buy to replace it!

Any ideas???

TIA

[Vanden Saab]

EA69SYU said:

Some has come away when jet washing but I’m not sure what to buy to replace it!

Any ideas???

TIA

It looks more like a silver sand jointing mix than grout.