Essential Efflorescence and Salts Acid Remover is not recommended for acid-sensitive polished stone surfaces such as limestone, marble, manufactured stone, and so on. If uncertain, test the product in a non-obtrusive location first to assess its compatibility.  This test is crucial because acid-sensitive surfaces can sustain irreparable damage. Delicate surfaces such as chrome, enamel, wood, and others must be protected from splashes and vapours. Acid-based cleaners can produce vapours that might damage delicate surfaces. The extent of contamination will determine the degree of coverage, per litre this product should cover, 15m2 to 30m2. Available in 5L and 25L. HOW TO APPLY:   1. Before you begin, clear any loose material from the work surface and make sure you have proper personal protection, such as gloves , protective eyewear , a face mask , and clothing. 2. The product should be used straight or diluted up to 1 to 5 with clean water: always do a small test area to determine the appropriate dilution rate and dwell time. 3. Wet the surface, then apply Essential Efflorescence and Salts Acid Remover, either neat or diluted up to 1:5 with water. The rate of dilution will be determined by the degree of contamination. 4. Apply the substance evenly to the surface right away with a sponge, brush, or sprayer. Allow it sit for 10-15 minutes before scrubbing the area and washing away with plenty of clean water. 5. Do not allow the product to dry on the surface. 6. In circumstances of substantial contamination, this treatment may need to be repeated. Please Note: Essential Efflorescence and Salts Acid Remover is not recommended for polished or highly honed acid-sensitive stone surfaces such as limestone, marble, artificial stone, and so on.