Why are my paving slabs turning white?

The phenomenon of efflorescence occurs when water soluble salts migrate to the surface of the paver with the help of water (i.e., condensation, rain). Once the mixture of water reaches the surface, it mixes with the carbon dioxide in the air and creates a white haze/film that covers the pavers.

Can efflorescence be fixed?

Efflorescence and alkali salts can be removed by dry brushing with a stiff bristled brush followed by wet sponging the surface with a mild 5% solution of white vinegar (Acetic Acid) in water. The whole area should then be wiped down with a damp cloth and allowed to dry thoroughly.

Does sealing stop efflorescence?

Sealing masonry surfaces The best protection against efflorescence and water damage is to use a penetrating sealer to make the surface entirely waterproof. The products we recommend using are a masonry sealer such as Resistain or Shower Plug.

Is efflorescence a serious problem?

Ultimately, efflorescence itself isn’t dangerous. However, it can lead to potential moisture problems that can cause structural damage to building materials. That means if you find efflorescence in the basement or on concrete and other structures, it’s important to take action.

Does sealing pavers prevent efflorescence?

Not only does sealing help prevent efflorescence, there are also many more Benefits of Sealing Your Patio Pavers. Use the broom and sweep any loose material including sand and dirt from the surface of your block. Mix the Rust-Oleum Efflorescence Remover with water inside the garden sprayer (or plastic watering can).

Can efflorescence be removed?

In general, most efflorescence can be removed by dry-brushing followed by flushing with clean water. If brushing is not satisfactory, it may be necessary to use a very light (brush) sandblasting to remove the deposits.

How do I permanently remove efflorescence?

Removing efflorescence – three strategies

  1. Stiff brush. On some smooth surfaces, you may be able to use a stiff brush.
  2. Water rinse. On other surfaces, rinsing with a garden sprayer or pressure washer can dissolve efflorescence, allowing it to run off.
  3. Chemical cleaning.

Does efflorescence come back?

After removing initial efflorescence blooms, they should not return. Efflorescence on pavers will eventually stop on its own after the salts in the pavers have dissipated.