The essential brick acid cleaner easily removes cement and mortar debris. It is an increased formula for cleaning all types of acid-resistant internal and external surfaces. It is a powerful, fast-acting formula that dissolves and strips away surface residues such as mortar and cement, efflorescence, encrusted and engrained dirt, and light calcium and limescale deposits. Apply neat or dilute up to 1:5 with water. Available in 5L and 25L HOW TO APPLY :  1. Before you begin, clear any loose debris from the work surface and make sure you have sufficient personal protection, such as gloves , appropriate protective eyewear , a face mask , and suitable clothing. 2. Essential Brick Acid Cleaner should be used straight or diluted up to 1:5 with clean water – always perform a tiny test area to find the appropriate dilution rate and dwell time. 3. Wet the surface first, then apply Essential Brick Acid Cleaner, either neat or diluted with water up to a 1:5 ratio. The rate of dilution will be determined by the extent of contamination. 4. This product is not recommended for acid-sensitive surfaces such as enamel, zinc, chrome, stainless steel, polished marble and limestone, lacquers, and so on. 5. When using Essential Brick Acid Cleaner indoors, make sure there is proper ventilation during and after use, and verify that no vapours remain in the room. 6. If the problem persists, the solution may need to be reapplied, diluting to a tougher mix and working in smaller areas. PLEASE NOTE: Prior to use, always test the product in an unnoticeable location. Contact with clothing, materials, and fabrics should be avoided as this will result in damage and staining. Avoid using carpets and soft furnishings. Wipe up spills immediately and thoroughly rinse with cold water.