• What are the causes for stains in the MORTEX® product and how to avoid them ?

    Causes for the stains
    When the MORTEX® product is applied in a very structured manner with the formation of micro cavities of varying sizes, penetrations of fatty liquids or other liquids are possible at these openings.

    These places are indeed weak points for the coating and its protection. It is essential to treat these cavities carefully to avoid possible penetrations. If the protective products (varnishes, oils, etc…) are applied by means of a normal treatment (roller or brush…), they will not penetrate these cavities, as these products are too thick. It is imperative to push them by tapping with the brush/paintbrush to treat the edges of these cavities as well as the bottom.

    We therefore experience a lateral capillarity phenomenon at these places, from underneath the protection, causing a stained substrate. The latter can only dry through the small openings formed by the micro-cavities in question. Grease can never escape.

    For “technical” layers (floors, showers, etc…), the presence of an open-pored support (cavities) is already an application deficiency. This weakness impedes the tightness of the system and will tend to clog up in these areas.

    The presence of stains in some places and not in others proves that the protection (varnish or other) is effective where it is well applied.

    The stains are only present in places that have not received protection. It is therefore imperative to dab the varnish or other protection into these small untreated cavities. These untreated cavities should of course always be avoided.

    Smooth surfaces can also be affected if the protection is not applied correctly.

    The right application to avoid stains
    We therefore always recommend that a sample be taken and validated to determine the finish (structured, smooth, etc.) according to the future use of the site.

    E.g.: for a shower and/or a worktop, we always recommend a smooth finish to avoid clogging and facilitate maintenance.

    It should be taken into account that these cavities are sometimes difficult to protect because some of them communicate through their bottom. It is in these cavities that dirt (dirt, soap, cleaning residues, oily products, hair dyes, flour, butter, etc.) will settle. The micro-cavities create a possible passage for water.

    It is therefore essential to seal the surfaces carefully, avoiding the presence of large micro-cavities, and to apply the protection according to the rules of the art


Beal International installs cookies to analyse the use of its website, to improve your browsing experience and to better tailor the content and the advertisements on its website to your interests. Partners with whom Beal International collaborates can also install advertising cookies via the Beal International website in order to show you advertisements that may be relevant to you on other websites and social media. Click on "I accept all cookies" to accept the cookies and go directly to the website or click on “Change settings” to change your cookie preferences. Please note that if you block certain cookies, this may hinder the correct functioning of the website.

Change settings I accept all cookies
Edit Cookies.
  • Some cookies are essential for the functioning of the site and are automatically active (eg session ID) You can’t disable these cookies. Beal International’ first party analytical cookies make it possible to analyse traffic on Beal International website. These cookies are purely statistical. They enable Beal International to analyse the use of its website by, for example, quantifying visits to the site, determining whether there are perfomance issues or bottlenecks, etc. This information helps us to provide the best service and performance.

  • We use Google Analytics to study the browsing behaviour of visitors to this site. This is a website analytics service provided by Google Inc. Google Analytics collects information on an anonymous basis, such as the number of visitors to this site, their country, region and city of origin, the type of browser and operating system they are using, the date, time and duration of visits, the pages consulted, and what other websites they visited prior to coming to this site. Our use of Google Analytics includes the Demographics and Interest Reporting component.

  • These cookies may be set through this site by our advertising partners. They may be used by those companies to build a profile of your interests and show you relevant adverts on other sites. They do not store directly personal information, but are based on uniquely identifying your browser and internet device. If you do not allow these cookies, you will experience less targeted advertising.