Penetrating vs Topical Concrete Sealer

A penetrating sealer soaks into the concrete itself rather than sitting on top of it, so it does not change how the surface looks or feels underfoot. It works by making the pores of the concrete water repellent from within, which is why it is a common choice where a natural finish matters, such as driveways and paths.

A topical sealer forms a film on top of the surface instead, which is what gives a matt, satin or wet look finish. It offers a more visible level of protection and enhances the colour of the concrete, but because it sits on the surface it wears with foot and vehicle traffic over time and eventually needs reapplying.

Driveways and paths that see regular vehicle or foot traffic often suit a penetrating sealer, since there is no film to wear through. Pool surrounds and decorative areas, where the finish itself matters as much as the protection, are usually where a topical sealer's look earns its place instead.

A sealer only performs as well as the surface underneath it. Concrete needs to be properly cleaned and left to dry fully before either type is applied, since sealing over residual grime, oil or moisture traps the problem underneath rather than protecting against it, and it is the most common reason a sealing job does not last as long as it should.