Beeck's Etching Fluid

General Instructions

• Check substrate suitability as required (see datasheet). Pay particular attention here to the absorbency, strength and texture of the respective substrate. 
• Carefully cover surfaces which are not to be treated – especially glass, ceramics, window sills, expansion joints, lacquer and anodic coatings – and protect them from splashes.
• Watch out for drifting splashes caused by the wind. Enclose the façade if necessary.
• Wear protective clothing, protective gloves, safety glasses or goggles/ face protection.
• Do not use in enclosed spaces, basements, shafts or manholes. Ensure sufficient fresh air exchange when working indoors.
• Do not use in wet conditions, if there is a risk of frost, on hot surfaces or in the blazing sun.
• Application temperature: +3°C to +25°C
• Do not let the acid dry out, rinse after 10 – 15 minutes.

Application 

• With acid-proof brush:
• For use on façades, thin BEECK Etching Fluid with 3 parts water (stir in 1 part BEECK Etching Fluid into 3 parts water); thin with 5 parts water for use on interior surfaces and on critical substrates.
• Apply by brushing onto the render or plaster uniformly. Avoid runs and sags in the dry render or plaster.
• Prewetten critical surfaces with a water hose.
• Etch façades from the bottom upwards. Do not let the acid drain into the ground or onto adjacent areas.
• A reaction can be recognized by effervescence on contact with the surface of the building material.
• Application time of the acid around 10 – 15 minutes.
• After the reaction has finished, recognisable by the receding effervescence, rinse with plenty of clean water (high pressure cleaner or garden hose; if used on interior surfaces, use a stiff broom to sweep off loose plaster particles)
• Also etch and rinse areas of new render or plaster and local making good of render or plaster. Do not let the acid run onto intact surfaces.