Why not a flat smooth level grouting?

By filling up the grout lines to the brim, applicators are actually creating the problem of grout lines popping out in the future.

For more serious cases, tiles popping is a possibility.

Current grout sealing applicators in Singapore are told to mix their product with W1(cement hardener) to give tiles a finer finished look. This is actually not accepted by relevant authorities as this does more harm to your tiles than help. The dirt that gets in will be close to impossible to remove and it actually forces owner no other choice in the future than to remove the whole tiles instead of only redo-ing their grout.

Epoxy Flake/ Marble gum issue

(Sent from home owners from renovation group chat)