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Surface Restoration And Treatment Of Limestone, Marble, Concrete

Options To Prevent and Repair Acid Etching

To Repair: Existing Marks (Including From Acid Etching) On Finely Finished Limestone, Marble, And Concrete.

   Click the picture to see how "Fine Stone Restoration" lets you repair these dense, smooth finishes.

You can use "S-B-S Sealer" aerosol cans to restore the shine and protect against future damage.  You may be able to spot seal and feather out the edges to match the gloss level on untreated areas.

Video: Spraying a tabletop with S-B-S Sealer


To Prevent Acid Etching

If the finish of the surfacing is absorbent enough to seal it with one of our solvent based penetating sealers to a glossy level, the stone will be rendered acid resistant to a very high degree. These sealers are not attacked by acids and therefore will protect the stone. See S-B-S Sealer as a good choice for this, and review the surfacing in Surface Types.

If you choose to use Aldon "Fine Stone Sealer", you will note on that sealers page that it will slow down, but not stop acid etching. However, there is another option. If you will accept a level of gloss as shown in the pictures below, you can create an acid resistant finish.

The key is in the use of Aldon "Lifeguard" to create the acid resistant film. "Lifeguard" needs to be applied to a very low or non-absorbent surface. Test to determine how "Lifeguard" flows out on the surface and if the surface needs to be sealed first. The pictures below show the appearance and acid resistance of this process.


This is a piece of honed limestone that is not sealed. It is low enough in absorption that the Lifeguard film forms and creates a "nubby" look by following the texture of the stone very closely.
Protecting marble and limestone from etching
The same piece of honed limestone as above, except it has been sealed first. In this case, with Aldon "Fine Stone Sealer". Note how much smoother the "Lifeguard" film becomes on the sealed surface.
Protecting marble and limestone from etching
This is the same piece as above with a puddle of powerful *hydrochloric acid solution.
  • The red arrow points to natural stone - note fizzing as acid etches the stone.
  • The yellow arrow points to the Lifeguard portion - no fizzing.
Protecting marble and limestone from etching

* Hydrochloric acid is far more aggressive than the acids found in fruit juices, wine, and cleaners.

Your results from any process may vary due to differences in surfacing characteristics. Please test carefully.