How to Restore Acid Stained Floors and Driveways


Acid stained concrete driveways or slabs on grade are attacked by moisture migrating from the ground, which carries dissolved salts and alkalis to the surface ("efflorescence"). This soon degrades the acid stained surfaces. Stained concrete is usually coated with a surface sealer but this aggravates the problem by trapping moisture, which activates more efflorescence inside the concrete and accelerates its deterioration.

Badly Deteriorated Acid-Stained Floor

Remove the color and surface layer by shot blasting, sand blasting, grinding, or similar.

Then, waterproof and stain the concrete in one step with LastiSeal Stain & Concrete Sealer.

Applying a clear coating or wax will protect the surface against spills and abrasion, and will add gloss to enhance the surface colors. The surface sealer will last much longer because the concrete has been deep-sealed with LastiSeal.

Deteriorated Surface Sealer

UV-ray and, heavy traffic, as well as efflorescence and moisture from the concrete will break down the surface sealer. It has to be re-applied every couple of years.

LastiSeal Stain & Concrete Sealer provides a better solution:

  1. Surface Prep
    The concrete surface has to be porous. Remove any remaining surface sealer. Pressure washing may do it. Let the concrete dry out for at least three days.
  2. LastiSeal Stain & Concrete Sealer
    Deep-seal the concrete and color stain it in one step with LastiSeal. This will waterproof the concrete and restore the surface color.
  3. Surface Sealer
    Let the surface dry out for several days and apply a clear coating. Hardware or paint stores supply a variety of acrylic, urethane, or epoxy coatings. LastiSeal is a great primer for these coatings.

LastiSeal waterproofs the concrete against water from above or below and reduces the infiltration of water vapor. This also prevents the accumulation of water underneath the surface sealer and eliminates or reduces efflorescence.

The attractive color of the concrete stained with LastiSeal and the surface sealer will last much longer.

By stopping water migration, LastiSeal preserves and protects the concrete against deterioration.