A penetrating sealer protects the pavers from potential stains from
car oil, tire-markings, grease, or algae. It typically makes the color
of the pavers appear richer, almost as they would appear when wet.
Penetrating sealers also prevent water from entering the pavers. In
colder climates, water that freezes inside a paver can break or weaken
Some homeowners decide not to apply penetrating sealers, because they
would prefer an older or worn look. Additionally, because penetrating
sealers usually need to be reapplied every few years, some homeowners
choose to avoid future maintenance.