These are four different jobs sharing a name. Concrete flatwork takes a penetrating silane or siloxane that repels water and staining without changing the look, or a film-forming acrylic where someone wants the wet, darkened finish. Pavers want a sealer that stabilises the joint sand as well as protecting the face. Marble and travertine are calcareous stone, porous and reactive to acids, so they take a penetrating impregnator. The acidic cleaners that are fine on concrete will etch them permanently.
So we quote by surface, not by square foot alone. A plaza with concrete walkways, a paver entry and a travertine pool deck is three specifications on one site, and running one product across all three is the most common way a sealing job fails.
- Concrete: penetrating silane or siloxane, or an acrylic where a wet look is wanted
- Pavers: joint sand stabilization as well as surface protection
- Marble and travertine: penetrating impregnator, never an acidic cleaner
- Pool decks and coping: slip resistance is written into the specification