How to Restore Acid Stained Floors and Driveways


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

Deteriorated Acid Stained Floor

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

Remove the remaining coating and the stained surface layer by grinding, shot blasting, sand blasting, or similar. If the concrete is not porous enough, the stain will filter out out on the surface and will easily wash off.

Old and weathered outdoor concrete may be porous enough for LastiSeal Stain to penetrate but make sure to test first with an eyedropper test and a sample of LastiSeal. However, grinding the surface first is always the safe approach.

The concrete must be clean, dry and well-cured with pH between 9 and 6.

LastiSeal® Concrete Stain & Sealer Application

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

Do not over-apply LastiSeal® Stain!

Concrete preparation, as well as the application, are the responsibility of the user!

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

Deteriorated Surface Sealer


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.