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Understanding Calcite Based Stones

 

 

 

 

 

 

 

The above marble countertop shows etching on marble and it is not
staining on marble. Countertop is not sealed with Granite Shield sealers.
 
The Granite Shield process on calcite based stones will not prevent surface etching but will reduce it about 80%.Granite Shield does have a repair kit that should etching happen if sealed with Granite Shield sealers remove etching in minutes on polished or honed surfaces. Acidic liquids, alcohol and vinegar can etch marble, travertine and limestone if left unattended on your stone surface. Water with a lower pH level lower than 7 is considered acidic.
 
pH Values
 
Stomach acid 1 to 3
Lime Juice - 1.8 to 2
Lemon Juice - 2.3
Coca Cola - 2.5
Soft Drinks - 2.5 to 3.0
Vinegar - 2.4 to 3.4
Apple Juice - 3
Orange Juice - 3.5
White wine - 3.0 to 3.3
Red wine - 3.3 to 3.5
Drinking alcohol such as gin, rum and vodka - 3 to 6 adding Orange or Lime juice will lower pH
Tomato & Tomato Juice - 4.2
Beer - 4.5
Coffee - 5.5
Normal rain - 5.7
Milk - 6.2
Saliva - 6.3 - 6.6
Dog urine - healthy is 6.2 to 6.5
Drinking water - 6.5 to 8
Water - Under 7 is considered acidic
 
There is currently no penetrating sealer that can stop etching on calcite based stones. On Absolute Black granite etching causes gray rings and spots on the surface. A topical sealer is not recommended for natural stone because it blocks the pores of the natural stone then can't breathe and the top coating can scratch easy. So what happens to natural stone that can't breathe? Moisture gets trapped and can cause a chemical and mineralogical change within the stone. This action of decay in natural stone may take form of pitting, spalling, flaking and oxidation. You want your natural stone to breathe or it will disintegrate.
 
 
 
 
 
 
 
 
Granite Shield is a national and international sealing service providing customer leads to authorized Granite Shield applicators.
 
Applicators and granite fabricators are independent contractors and businesses and are not employees of the Granite Shield corporate office.
 
Copyright 2012. All rights reserved. Granite Shield is a registered trademark.
 
Kleen N Shine, Kleen N Seal, Kleen N Shield, Granite Kleen, MicroArmor, Silicabright, Pro-Armor, Pro-Premier, Crystasheen, Armor, Nustone Kleen, Premier, Ultra Seal, Stone Shield, Krete Shield is a trademark and/or registered trademark of Granite Shield.