Use a builder’s trowel to push wet mortar into the gaps, then smooth the surface with a brick jointer. Avoid staining the surface of the pavers.
To finish the patio you may need to cut some pavers to size or shape, using a stone saw. First measure and mark out the cut you need to make, and lay the paver on a deep layer of sand. Holding the stone saw firmly, draw the blade along the desired cut until complete. For your own safety, wear goggles, gloves, ear plugs and a dust mask when cutting.