What does sealing pavers do?
Sealed pavers resist mold, dirt, and grime. So it makes the pavers less porous so that mold will grow a lot slower and make it easier to clean up and also helps protect against dirt and grime
What happens if pavers are not sealed?
Pavers that aren’t sealed will be more likely to grow weeds in the joints, they will fade and loose their color from wear and UV breakdown, and because most newer paver sealers include an additive that will harden the joint sand it is less likely that you will have settling or shifting caused by joint sand loss.