Skip to main content

Exterior concrete coating

Outdoor concrete can quickly be damaged by moisture, green algae, and mold without protection. With Osmo coatings and oils, the surface stays looking good longer, remains water-repellent, and is sustainably protected against weather influences.

Stone staircase

Products in this knowledge item;

Protecting outdoor concrete

Concrete is widely used as a building material for fences, balconies, and tiles. Because concrete is porous, it needs protection. Without a coating, concrete can be damaged by moisture, green algae, and mold. Applying a coating protects the concrete, extending its lifespan, and also enhances its appearance.

Benefits of Osmo Steen en Terracotta Olie

  • Ideal for protecting surfaces such as natural stone, artificial stone, and terracotta
  • Provides transparent protection
  • Makes the surface water- and dirt-repellent
  • Significantly reduces dust from screeds and concrete surfaces
  • High coverage: 1L treats up to 50 m²

Supplies for coating outdoor concrete

Treating outdoor concrete with Osmo

Concrete used outdoors, such as for tiles or fences, can be treated with Osmo Steen en Terracotta Olie. This oil impregnation is specially developed for porous exterior stone and terracotta surfaces. As the name suggests, it can also be used on terracotta pots and tiles. The coating provides long-lasting protection against moisture and dirt.

Osmo Steen en Terracotta Olie gives a colorless finish to the surface, enhancing the natural look as if it were wet. The oil is made from natural, plant-based ingredients, such as sunflower oil and soybean oil. With 1 L of coating, you can treat up to 50 m², offering excellent coverage. Additionally, this exterior concrete coating does not form a surface film, as it penetrates the concrete. Dust from outdoor concrete floors is greatly reduced after treatment.

Front yard plants

How to coat concrete outdoors?

Apply the concrete coating with an Osmo Brush, Floor Brush, or Microfiber Roller. Apply very thinly and spread evenly. Always test first to check adhesion and the result.

After 20 minutes, remove any excess product with a Fleece Pad or Easy Pad Polishing Cloths. The liquid oil must be absorbed into the surface; no oil should remain on top.

Allow 8–10 hours to dry, ensuring good ventilation. The coating must not get wet during drying.

Apply the second layer very thinly as well, removing any excess product again. Let this layer dry for 8–10 hours too.

When renovating previously oiled surfaces, usually only one layer on a cleaned surface is sufficient.

Painting concrete outdoors

When painting concrete, a solid colored layer is applied. Osmo does not have a paint for concrete: Osmo Landhuisverf is only intended for exterior wood. To protect outdoor concrete without adding color, use Osmo Steen en Terracotta Olie (see above). Since every concrete surface reacts differently to coatings, it is always recommended to first perform a test on an inconspicuous spot to check adhesion and results.

Coating concrete indoors

If you want to coat concrete indoors, Osmo Beton Olie is the right product. This oil is suitable for all indoor concrete floors, walls, and kitchen surfaces. Beton Olie provides a protective layer against water, dirt, and stains. It dries semi-matte, giving a slight gloss, and does not form a surface film on the concrete. The coating makes the surface water- and dirt-repellent as well as stain-resistant. Dust from the concrete is also greatly reduced after application. Osmo Beton Olie is only suitable for indoor concrete. For outdoor concrete, Osmo Steen en Terracotta Olie is the appropriate product.

Color examples

Products for treating concrete

We're happy to help

Looking for DIY advice or have a technical question?

Need DIY help?

Find your project and read the step-by-step guide.

Technical question?

Get advice from a technical specialist.