Beeck Etching Fluid is a specialised, mildly acidic pre-treatment designed to remove lime binder deposits, surface laitance, and sinter skin from mineral substrates such as lime or cement renders. As part of the Beeck Mineral Paint system, it improves the chemical bond between the substrate and silicate-based paints like Beeck Renosil or Beeckosil ASF, ensuring long-lasting, vapour-permeable performance.
This solvent-free, nearly colourless solution exposes the silica content of the mineral surface, allowing the silicate paint to chemically bond through the process of silicification, rather than merely adhering to the surface like conventional coatings.
✔️ Removes: Lime binder residues, sinter skins, and surface laitance
✔️ Improves: Paint adhesion and chemical bonding with mineral paints
✔️ Colour: Nearly clear or lightly pink-tinted
✔️ Binder-Free: Free from solvents, biocides, and preservatives
✔️ Dilution: 1 part Etching Fluid to 3–5 parts clean water
✔️ Coverage: Approx. 0.02 L/m² concentrate, or 0.08–0.10 L/m² diluted
✔️ Sizes Available: 5L
Where to Use
Ideal for:
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External lime and cement renders (new or weathered)
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Mineral-based facades prior to Beeck Renosil or Beeckosil paint systems
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Cleaning weathered silicate coatings to refresh mineral surfaces
Unsuitable substrates include:
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Gypsum and natural stone
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Lightweight, insulating, or synthetic resin renders
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Thin-coat or ETICS (External Thermal Insulation Composite Systems)
Application & Preparation
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Dilute with 3–5 parts clean potable water, depending on substrate condition
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Apply with an acid-resistant brush to a water-wettable, clean, and stable surface
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Always test on a small, inconspicuous area before full application
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Rinse thoroughly after use and allow the surface to dry fully before proceeding with paint application
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Always refer to Beeck's full technical documentation for specific guidance
Why Use Beeck Etching Fluid?
When applying Beeck Mineral Paints, surface preparation is critical. Beeck Etching Fluid ensures a clean, receptive mineral surface by removing unwanted binder layers and exposing the silica matrix. This ensures maximum durability, breathability, and longevity of your mineral paint finish—whether you're restoring a historic facade or working on a breathable new-build system.
