Answer: use mortar or sand.
In all cases, it is necessary to work in dry weather and remember that it takes at least 3 mm between each paver. It all depends on the type of material used for your joints. With mortar, simply pour the product into the joints and scrape, then clean as soon as it takes before perfecting your work once dry. With sand, the filling is done with a broom, by successive passes. Then, depending on the quality of the material, classic or polymer, tamp with water or with a joint iron. Polymeric sand does not like water in abundance, so use a sprayer. It also requires waiting a day before use. With epoxy, little used by individuals since it is suitable for heavy road traffic, apply with a gun and carefully smooth in layers. Clean gradually with a special pad, dry with a sponge. You too, send us your brico question