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PROADVANCED Technical Bulletin - ETCHING

PROADVANCED Technical Bulletin - ETCHING

December 09, 2010



ProAdvanced Protection Program


 After numerous inquires regarding etching in natural stone, it is important to define etching, the differences between etching and a stain, and why etching occurs.

Etching in natural stone is caused by a chemical reaction between an acidic substance and calcium in the stone. This degrades the polish in the stone and results in dullness, light colored marks, and many times rings in the stone caused by acidic drinks running down a drinking glass. However, spots may also occur from water splash; this is more likely mineral deposits from water evaporation, but may appear similar to etching. This may be particularly noticeable around faucets and sinks.

Stains in natural stone will appear as darker colored spots or area, based on and caused by the staining agent which has made contact with the stone for an extended period. This usually occurs where sealer may have been removed by non-recommended cleaners over time. Most common stains can be removed from the stone without much difficulty. Etch marks, or acid etching normally will require a restoration professional to resurface or re-polish the stone; and after completing the process, resealing is absolutely necessary.

Marble and limestone are extremely susceptible to etching; however any natural stone may etch under certain circumstances. True marble, limestone, and travertine are composed mainly of calcium carbonate, which is reactive with common food acids in fruit juice, soda, coffee, alcohol, salad dressing, etc. If this liquid spills on the surface it will etch the surface of the marble very quickly. Again, etching destroys the polish leaving a dull, light spot or rings. Seal your marble well and there will be no stains, but it will most definitely etch.

To keep your natural stone looking its best; clean up spills immediately, do not use harsh cleaning chemicals, clean with warm water and use Dupont StoneTech® Revitalizer® 2 to 3 times per week which helps to reinforce the original sealer. Pay particular attention to areas around sinks and faucets, stoves, dishwasher, and any heavy use areas. You may also choose to use coasters under glasses and trivets under dishes, pots, and pans to protect your investment from etching.

We do not recommend home remedies in an attempt to repair etching due to potential damage to the stone. The PROADVANCED Protection Program from Daltile offers one of the best stain protection warranties in the natural stone industry today.

Thank You

Protect Plus Surfaces