lanai floor CRACKS

Others simply fill these cracks with the least-expensive compound, paint over that and call it a day. The moisture in and around those cracks breaks-down the concrete over time and the cracks come right back quickly.

The cracks need more attention than that; sometimes, hand-planing/scraping to remove the loose material and wet concrete in and around the crack.

 I put an angle-grinder to the cracks on your lanai floor, removing all the loose concrete.

When cracks are deep, I insert a backing rod to ensure the polymer filler takes hold ... and stays held.