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  • Silicate Paint - Auro 303 Silicate Paint

Auro 303 Interior Natural White Mineral Paint

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Product Description

Silicate Paint for Interior Walls and Ceilings

Silicate paint available in white Auro 303 is a high grade Silcate paint for internal use.

The paints high alkalinity provides a natural fungicidal paint for walls and ceilings that are prone to mould growth. Auro silicate paint now contains Replebin® a natural binding agent developed by Auro, which gives improved adhesion to a range of substrates including cement, gypsum, plasterboard, clay.

This is the problem solver for alkaline walls prone to mould growth, e.g. concrete and rendering inside, also suited for use on all surfaces cabable of silification; lime, sandstone, brickwork, gypsum plasterboard, clay and others. It has a fungicidal and algicidal effect thanks to its alkalinity.

The combination of potassium water glass and the biogenic binder Replebin®* ensures professional product characteristics: highly water vapour permeable, free of preserving agents, class 1 hiding power, wet abrasion class 2.

Auro 303 paint is durable, permanently white and easy to use.


  • Anti-mould paint, inherently mould resistant
  • For Interior Use
  • MI Free (solvent free - free of preservatives)
  • Breathable (SD value < 0,01 m)
  • Low odour: (VOC Level < 1 g/l)
  • Wipeable (Abrasion Class 2)
  • Vegan
  • Excellent hiding power (one coat is usually sufficient)
  • Brush, Roller or spray on
  • Coverage approximately 8-10m² per litre

Drying time: Quick drying 4-6 hours between coats, 48 hours to fully cured
Approx coverage: 5 Litre = 45m², 10 Litre = 90m²


  • Mineral fillers,
  • Water,
  • Titanium dioxide,
  • Replebin®,
  • Potassium silicate,
  • Silicates,
  • Cellulose,
  • Surfactants made of rapeseed and Castor oils,
  • Xanthane

Further Information:

*Replebin is an innovative, biogenic binder. It has been developed by Auro throughout a long term and complex research process. Replebin consists of plant alcohol esters with organic acides. This modern binder is legally protected and only available at Auro.

Natural products are neither odourless nor emission-free. The use of organic, natural and plant based ingredients means that allergy and asthma sufferers and people who are chemically sensitive are much more able to tolerate Auro products, however they may cause allergic reactions in some. If you wish to know about what raw ingredients Auro use in their products please visit our Auro Raw Materials Guide.

For more detailed information, download 303 Technical Data Sheet and Safety Data Sheet (opens in a new tab).


In some in German. All open in a new tab.


See the 303 Technical Data Sheet for full details, however in brief:

Clean and prepare the surface.

Apply one or two coats of silicate paint by brush or roller.

On smooth surfaces with even absorption, the silicate paint can be applied without a primer.
For surfaces with varying absorption rates with recommend a priming coat of Auro 301 plaster primer 
For uneven surfaces a coat of Auro 505 grip coat should be applied first.

Cleaning tools Remove product residues immediately after use by brushing out from the tools before it dries, wash with water,
add AURO 411 Plant Soap if necessary. Remove stains and splashes with water immediately.

You may also need Brushes or Rollers, Masking Tape and Paint Trays - see our Painting Accessories page.

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