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Unsealed concrete absorbs water, oil, and stains. Over time it cracks from moisture expansion and UV damage. Sealing creates an invisible barrier that prevents absorption and extends the life of driveways, walkways, and garage aprons by years.
Why Concrete Needs Sealing
Concrete is porous. Water penetrates the surface, expands during temperature changes, and creates hairline cracks. In Orange County, UV exposure accelerates surface degradation. Oil from vehicles stains unsealed driveways permanently. A sealer closes the pores and creates a surface that repels water and resists staining.
Types of Concrete Sealers
Penetrating sealers soak into the concrete and protect from within without changing the appearance. Film-forming sealers sit on top and add a visible sheen ranging from matte to high gloss. Penetrating sealers last longer and require less maintenance. Film-forming sealers look better but need reapplication every 1 to 3 years.
For driveways, penetrating sealers handle vehicle traffic better. For decorative walkways and stamped concrete, film-forming sealers enhance color and texture.
What Concrete Sealing Costs in Orange County
Concrete sealing runs $1.50 to $4 per square foot in Orange County. A typical two-car driveway of 400 to 500 square feet costs $600 to $2,000 depending on sealer type and surface condition. Walkways and smaller surfaces cost less per project but similar per square foot.
How Often to Reseal
Driveways need resealing every 2 to 3 years. Walkways and covered surfaces can go 3 to 5 years. The test is simple: sprinkle water on the surface. If it absorbs immediately instead of beading, the sealer has worn off and the concrete is exposed.
Sealing vs Staining
Sealing protects without changing color. Staining changes the color and includes a sealer. If your concrete looks fine but needs protection, seal it. If it looks faded or you want a different look, stain it first, then seal.
Riot Renovation seals and stains concrete driveways, walkways, patios, and garage floors across Orange County. Licensed B2 contractor #1139813.
Schedule your free estimate or call (949) 381-1555.
Related: Exterior Painting · Concrete Staining for Patios · Flagstone Staining
