Beeck Etching Fluid 1L

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Beeck Etching Fluid is used as part of the Beeckosil system and the Beeckosil guidelines.

This acid based etching fluid is used to thoroughly remove the 'fat' or sinterskin which creates a glassy surface which is waterproof and will inhibit the absorption of the silicate coatings. Beeck etching fluid can be used on new mineral surfaces or old lime plasters and renders and old silicate coatings to fully prepare the surface for the new silicate paint finish. This product is unsuitable for gypsum or natural stone surfaces.

Click HERE for the etching fluid technical data sheet

Click HERE for the etching fluid safety data sheet


Availability: In stock




BEECK Etching Fluid reliably removes sinter skin, a vitreous glossy high-tension and impermeable accumulation of binder on the surface of felted and floated lime and lime-cement renders. An unremoved sinter skin is a substrate defect according to VOB/C and poses the risk of stress-induced spalling, for example during driving rain. The gas-tight sinter layer also disrupts the carbonation and recrystallisation of "healthy" lime renders and plasters. They become worn and crumbly underneath the glass-hard layer. Creating a stress-free, porous and firm, surface zone is particularly important for pore deep, permanent silicification of active silicate paints such as BEECK Pure Crystalline and Beeckosil. At the same time, a uniformly absorbent homogeneous surface is created by the etching, which makes it possible to apply smooth, seamless and stain-free mineral coatings.

The acid neutralises within a few minutes on the highly alkaline substrate. Rinsing with water is therefore not for neutralisation purposes, but instead to remove exposed textural and aggregate particles on the surface of the render. Especially in interior areas, these can also be removed from the plaster with a stiff broom before coating.


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