Patio/pathway porcelain tiles - best grout?

[Happy Valley]

As per the title - looking for the best (to work with) grout or similar for over 100 sq m of porcelain tiles. 

 

Ideally something that's easy to work with as well being frost proof.

[Happy Valley]

Does @nod have any expert view on this?

[nod]

Hi

 

I always use Mapei grout 

 

Many years ago before flexi adhesive 

Grout was mixed as a watery slurry Poured on and spread all over the tiles 

This would fill any voids under the tiles 

I still do this with exterior tiles 

 

Dont forget to seal the back of EVERY tile 

Porcelain is hard wearing and will last 

[Happy Valley]

Thanks - what is the reasoning for sealing the back of each tile?