Opinion of:

Paolo Sala

Product Manager for the Wall Coatings Line, Mapei SpA

From Realtà Mapei International n° 75 - 7/9/2019

Colours for your project

Interview with Paolo Sala, Product Manager for the Wall Coatings Line, Mapei SpA.
Location icon New York

What do we mean by the term “wall coatings”?

This term refers to smooth paints or textured coatings used to finish off walls. They are mixtures with a consistency that may be more or less fluid and are made from various substances of either mineral or synthetic origin that form a seamless, adherent coat when applied on a substrate. Their main aim is to coat the surfaces on which they are applied to protect them against wear during use and from atmospheric agents, and also to enhance their appearance from an aesthetic point of view by using different colours and textures.


What is the distinctive characteristic of Mapei wall coatings?

Wall coatings are not finished products; they only become so once they have been applied to a substrate. It’s quite clear, therefore, that you need to have a thorough knowledge of materials and the interactions that take place between “substrates” and “finishing coats”. Mapei is in a position to propose coatings as part of a complete system in which the various products work together in perfect synergy.

How do you choose the right wall coating to avoid having problems?

In most cases, the “diseases” that occur on façades are due to a rather superficial approach being taken when proposing finishing products, that is to say, without adopting an integrated and global approach. As a result there are various phenomena related to incompatibility between the substrate and the finishing product, which, when combined with the use of a product with insufficient performance characteristics, are responsible for the deterioration of buildings. Since a coating product is generally the last layer or coat to be applied, it is the first, and at times the only, “visible” part of potential problems or damage caused by employing inadequate or poor performing product cycles. Mapei Central Analysis Laboratory has the capacity to examine the various pathologies encountered in constructions, identify the cause of deterioration and verify the effectiveness of solutions. When coating products and paints are specifically developed to be perfectly compatible with repair cycles for surfaces, not only do they solve the technological problems of substrates, they also maintain their aesthetic value for longer.


What are the main causes of the deterioration of wall coatings? And what are the systems to overcome them?

- Elastomechanical incompatibility: sometimes mistakes are made during the design phase regarding the use of materials with an incompatible modulus of elasticity, which over the years can lead to cracking and rainwater infiltration into masonry. Thanks to their properties, such as elasticity and water-repellence, products from the ELASTOCOLOR line are able to provide a solution.

- Chemical-physical erosion: UV rays, acid rain and smog are amongst the main factors that contribute to the rapid deterioration of coatings. The QUARZOLITE system consists of products based on acrylic resin- and micro-quartz, with good filling properties and high mechanical resistance that give surfaces a higher level of durability and protection.

- Biological deterioration: because of climate change, the phenomenon that causes the formation of mildew and mould on buildings has become a widespread problem. In the SILANCOLOR PLUS system, over time, the water-repellence of siloxanes combined with BioBlock® Technology overcomes the problems connected with this kind of deterioration.

- Rising damp: this type of problem is encountered especially in areas close to lakes or the sea. It affects many residential and listed buildings and tends to damage both the paintwork and the underlying substrate. The synergic action of Pozzolan-based MAPE-ANTIQUE dehumidifying systems and coating products from the SILEXCOLOR and SILANCOLOR lines are the ideal and complete solution for restoring and protecting masonry.


Project data sheet

Yard modern arts museum
Location New York, USA
Subcategory MUSEUM
Built in 1937
Opened in 1939
Application concrete repair and exterior waterproofing
Start and finish date 2008
Application Type Waterproofing, Concrete restoration
Client Solomon R. Guggenheim Foundation, New York
Installer companies Nicholson and Galloway Inc., New York
Architects Wank Adams Slavin Associates, Robert Silman Associates
Designers (for works) Wank Adams Slavin Associates e Robert Silman Associates, New York
Project Manager FJ Sciame, New York

Products mentioned in the article

Washable water-based paint with low dirt pick-up and excellent washability for internal walls. TECHNICAL DATA: Consistency: thick liquid.…
Elastomeric, crack-bridging, permanently flexible, protective paint with high resistance to chemicals for internal and external surfaces.…
High-protection, thick-layered acrylic coating product with high filling properties for internal and external surfaces. Available in the…
Highly protective siloxane, mildew and mould-resistant primer. TECHNICAL DATA: Consistency: fluid liquid. Colour: milky. Density (EN ISO…
Highly protective transpirant, water-repellent, mildew and mould-resistant siloxane coating product for internal and external surfaces.…
Highly-transpirant silicate paint with a high chemical bond for internal and external surfaces, according to DIN 18363 Standards. TECHNICAL…
Realtà Mapei Tags: #insights #wall coatings #interview

Keep in touch

Subscribe to our newsletter to get Mapei news