Waterproof waxed concrete bathroom walls


Dare to use waxed concrete and lime on bathroom walls

Salle de Bain beton cire Marius Aurenti

Why waxed concrete is a trendy choice

The star of decorating magazines and the darling of interior designers, the waxed concrete on walls of bathroom gives a resolutely contemporary look to wall surfaces thanks to its wealth of colors and finishes - matte, satin or gloss.

As part of a "total look waxed concrete" design, it provides a magnificent visual continuity to the room.

Walls can also be laid à la lime in the bathroom, provided they are not directly exposed to water: these breathable walls carry the warmth of a thousand-year-old tradition, especially in the Mediterranean world.

Contact a Marius Aurenti consultant free of charge if you have any questions about your construction or renovation project.

Wall concrete colors and textures

Classic or bold shades

Neutral colors are the great classics in the world of waxed or varnished concrete applied to the bathroom: white, beige and light gray bring light into the everyday life of the naked body.

A rarer and bolder choice, black or anthracite grey add a touch of luxury to the room and can be used to contrast, for example, washbasins or a washbasin. shower in white ceramic, or bright or colored lamps and sconces.

Some prefer to surround themselves with warm, Mediterranean colors, ochre, earth, terracotta, or pastels like sky blue or turquoise green.

And then there are those who dare to dare bright colors: yellow, pink, electric blue, purple...

The richness of the Marius Aurenti colour chart makes it possible to combine waxed concrete walls and lime walls while maintaining perfect color harmony.

Texture effects

Visit wall concrete just like the lime and its variant, marmorinoThese can be combined to create striking contrasts or interesting harmonies:

  • smooth or textured
  • plain or cloudy
  • matte, satin or gloss

Advantages of waxed concrete bathroom walls

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Extremely hard-wearing, waxed concrete walls can last a long time without needing repair - although a coat of protective varnish should be applied after a few years.

Water resistance

Waterproof material after wood stain and / or varnish, waxed concrete is ideal for wet rooms such as bathrooms.

Easy maintenance

Waxed concrete walls are easy to clean and maintain, making them practical and more hygienic than tiles, whose joints tend to blacken.


Available in a wide variety of colors and textures, waxed concrete lets you customize the look of your bathroom.

Installing waxed concrete on a bathroom wall


Visit wall concrete is not exactly the same as concrete for floor laying: it's a mortar coating (a mixture of cement and sand) to be laid in a thinner layer, around 2 to 3 mm thick. It is also referred to as smooth fine mortar.

Laying waterproof concrete

To make a waterproof waxed concreteThe material itself must be made water-resistant.

The first step to water resistance is to waterproof the substrate. This is the job of the plumber, using products such as SEL or SPEC. WEDI-type waterproofing panels can also perform this function.

On old tiles, raking with EPXC MA's will grip and smooth the wall, and act as a barrier.

Once this preparation has been completed, the waxed concrete can be laid. Thickness plays a very important role in waterproofing, and the use of 4kg/m2 of material, i.e. 2mm thick, is essential.

Visit wall concrete Marius Aurenti raincoat is perfectly suited for use in bathroom.

Samples delivered straight to your door matériauthèque.

Varnish finish

Visit high-resistance varnish finish Marius Aurenti in three coats, matte, satin or gloss, will close the surface porosity of waxed concrete, ensure its aesthetic role and facilitate maintenance.

Marius Aurenti, with more than 15 years' experience in the realization of these applications in systems, allows daily use in residential housing, as well as for public spaces (hotels and bed & breakfastsspas...)

Laying wall concrete over old tiles or earthenware

To lay wall concrete over old tiles or earthenware, follow these steps:

Clean tiles

Clean tiles thoroughly with soapy water to remove dirt and grease residues. Rinse and allow to dry.

Prepare the tiles

Lightly sand the tile surface with fine-grit sandpaper to improve concrete adhesion.

Apply primer

Apply Marius Aurenti primer to the tiles using a roller or brush. Allow to dry according to manufacturer's instructions.

Mixing wall concrete

Prepare the wall concrete in the correct proportions. Make sure you obtain a homogeneous consistency.

Apply the first coat of wall concrete

Using a stainless steel float or spatula, apply a first coat of wall concrete to the tiles, making sure to cover the entire surface. Allow to dry according to manufacturer's recommendations.

Apply the second coat of plaster

Apply a second coat of wall concrete for a smooth, even finish. Smooth with a float to create the desired effect. Allow to dry completely.

Apply a water-repellent glaze and/or varnish

Depending on product specifications, it may be necessary to apply a varnish or water-repellent protection to protect the wall concrete from moisture and facilitate maintenance.

Be sure to follow the manufacturer's instructions and work in a well-ventilated area to ensure optimum results.

Laying concrete on plasterboard

To lay concrete mural on plasterboard, start by securing it in place:


Dust and clean the plasterboard to remove any impurities.

Primer for drywall

Apply a suitable primer to the plasterboard, then allow to dry according to the manufacturer's instructions.

Follow the steps described above from "Mixing wall concrete".

Practical tips for maintaining waxed concrete walls

To maintain your waxed, varnished, glazed or limewashed concrete bathroom walls, here are a few practical tips.

Varnishes and waxes are waterproof, but made from polyurethane they are not designed for standing water. Therefore, be sure to :

  • Do not leave permanently damp objects on varnishes and waxes. For example, don't leave a damp mop or doormat in the same place all the time.
  • Keep an eye out for water leaks and prevent condensation by heating or good ventilation.
  • Do not leave hygiene or beauty products (soap, shampoo, make-up remover, etc.) in permanent contact with the varnish or concrete.
  • Over time, renew the joints between your different materials to maintain impermeability and prevent water penetration.
  • In spas or steam baths, do not expose the material to water or steam temperatures above 80°C.
  • Avoid abrasive objects and products (scouring sponges, acidic or basic products) that could damage varnish or wax.

To find out more, read our Maintenance guide for waxed and varnished concrete


Waxed concrete and lime are elegant, modern wall covering options for your bathroom.

These materials offer a variety of colors, textures and finishes, allowing you to uniquely personalize your space.

Waxed concrete is particularly suitable for bathrooms, thanks to its durability, water resistance and ease of maintenance.

However, the installation of these materials can be complex and requires the help of a professional to guarantee optimum results.

By taking good care of your waxed concrete or lime walls, you'll be able to enjoy their beauty and functionality for many years to come.

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