Princeton is the fourth-oldest university of the United States and is considered one of the most prestigious universities all over the world. Nassau Hall, a sandstone building dating back to 1756, was treated with Protectosil® CHEM-TRETE® 40 VOC to provide full protection for the structure that houses classes for future architects, mechanical engineers, and chemists.
Princeton is the fourth-oldest university of the United States and is considered one of the most prestigious universities all over the world. Nassau Hall, a sandstone building dating back to 1756, was treated with Protectosil® CHEM-TRETE® 40 VOC to provide full protection for the structure that houses classes for future architects, mechanical engineers, and chemists.
Approximately 380,000 pieces of art have found their place in the Louvre Museum in Paris which may perhaps soon joined by the works of a graffiti artist. To prevent such artistic expressions, the equestrian statue in the inner courtyard and the sandstone benches carved into the exterior wall were treated with Protectosil ANTIGRAFFITI®, which allows for easy removal of undesired graffiti scribbles.
Approximately 380,000 pieces of art have found their place in the Louvre Museum in Paris which may perhaps soon joined by the works of a graffiti artist. To prevent such artistic expressions, the equestrian statue in the inner courtyard and the sandstone benches carved into the exterior wall were treated with Protectosil ANTIGRAFFITI®, which allows for easy removal of undesired graffiti scribbles.
Budapest Castle is the best-known building, situated on Castle Hill high above the Hungarian capital. In spite of its location, the castle is not resistant to the moisture rising up from the Danube valley below. The sandstone structure was therefore given a coating of Protectosil® that also repels dirt. Thanks to the application of the almost VOC-free Protectosil® SC CONCENTRATE on the walls in the interior courtyard of the castle, cleaning expenses have been significantly reduced.
Budapest Castle is the best-known building, situated on Castle Hill high above the Hungarian capital. In spite of its location, the castle is not resistant to the moisture rising up from the Danube valley below. The sandstone structure was therefore given a coating of Protectosil® that also repels dirt. Thanks to the application of the almost VOC-free Protectosil® SC CONCENTRATE on the walls in the interior courtyard of the castle, cleaning expenses have been significantly reduced.
The U.S. state of Utah covers an area of 219,887 square kilometers. Years of road salt, water, and subsequent freeze-thaw cycles had caused significant damage to major portions of the highways in the form of potholes, surface chipping and scaling. After treatment of the almost VOC-free Protectosil® AQUA-TRETE® 40, roads were reopened within 24 hours.
The U.S. state of Utah covers an area of 219,887 square kilometers. Years of road salt, water, and subsequent freeze-thaw cycles had caused significant damage to major portions of the highways in the form of potholes, surface chipping and scaling. After treatment of the almost VOC-free Protectosil® AQUA-TRETE® 40, roads were reopened within 24 hours.
Bridges span obstacles such as deep gorges, scenic valleys, or raging waters. The bridge in the Swiss town of Attinghausen crosses the river Reuss with a length of 159 km is protected with Protectosil® BHN.
Bridges span obstacles such as deep gorges, scenic valleys, or raging waters. The bridge in the Swiss town of Attinghausen crosses the river Reuss with a length of 159 km is protected with Protectosil® BHN.
The Sydney Opera House, with a length of 183 meters and a width of 118 meters, is situated in a park on Sydney’s harbor and houses different theatres. The 67-meter-high roof is covered with over a million white ceramic tiles. As a penetrating hydrophobic agent for concrete, brick masonry, and ceramic tiles, Protectosil® BSM 400 reliably protects the structure against moisture rising from the sea and improves the interior climate for the approximately four million annual visitors.
The Sydney Opera House, with a length of 183 meters and a width of 118 meters, is situated in a park on Sydney’s harbor and houses different theatres. The 67-meter-high roof is covered with over a million white ceramic tiles. As a penetrating hydrophobic agent for concrete, brick masonry, and ceramic tiles, Protectosil® BSM 400 reliably protects the structure against moisture rising from the sea and improves the interior climate for the approximately four million annual visitors.
The approximately over 500 figures of the western facade portal of the “Collégiale Saint-Thiébaut” in the Alsatian town Thann are treated with Protectosil® 300, protecting the 600 years old sculptures against harmful weather effects which make the stones brittle.
The approximately over 500 figures of the western facade portal of the “Collégiale Saint-Thiébaut” in the Alsatian town Thann are treated with Protectosil® 300, protecting the 600 years old sculptures against harmful weather effects which make the stones brittle.
Evonik uses the multifunctional, 1,800 square meters large building in Johannesburg‘s Midrand as the basis for its Sub-Sahara Africa Region. The climate in Johannesburg is sunny and dry, with strong thunderstorms and rain showers especially in the summer months. The resulting dust and dirt leaves traces on the house wall wherefore the building has been treated with silicone resin paint and Protectosil® SC 30 for easy cleaning.
Evonik uses the multifunctional, 1,800 square meters large building in Johannesburg‘s Midrand as the basis for its Sub-Sahara Africa Region. The climate in Johannesburg is sunny and dry, with strong thunderstorms and rain showers especially in the summer months. The resulting dust and dirt leaves traces on the house wall wherefore the building has been treated with silicone resin paint and Protectosil® SC 30 for easy cleaning.
The life expectancy of the Container Terminal Zeebrugge in Belgium could be extended by more than 100 years with Protectosil® BHN treatment as already proved in various studies by the University of Leuven at the quay wall of the container terminal.
The life expectancy of the Container Terminal Zeebrugge in Belgium could be extended by more than 100 years with Protectosil® BHN treatment as already proved in various studies by the University of Leuven at the quay wall of the container terminal.
Parking garages all over the world have to contend with water, dirt, and salt coming in with vehicles, which causes corrosion and affects durability. Corrosion rate measurements of the stabilizing reinforcement structure in the Monroe County parking garage documented the diagnosis of heavy active corrosion. Finally, the owner decided to include a surface applied corrosion inhibitor. Protectosil® CIT provided multi-functional protection to reinforced concrete, penetrating to and chemically bonding with reinforcing steel while also reacting within concrete matrix to impart hydrophobicity. Corrosion monitoring over 11 years provides proof that the treatment was successful.
Parking garages all over the world have to contend with water, dirt, and salt coming in with vehicles, which causes corrosion and affects durability. Corrosion rate measurements of the stabilizing reinforcement structure in the Monroe County parking garage documented the diagnosis of heavy active corrosion. Finally, the owner decided to include a surface applied corrosion inhibitor. Protectosil® CIT provided multi-functional protection to reinforced concrete, penetrating to and chemically bonding with reinforcing steel while also reacting within concrete matrix to impart hydrophobicity. Corrosion monitoring over 11 years provides proof that the treatment was successful.
The local crucifix sculpture in Córdoba, designed in 1794 by Juan Navarro León, is surrounded by a fence beset with lanterns to keep graffiti taggers away. However a protective layer of Protectosil ANTIGRAFFITI® repels much more effective not only graffiti but also rain and dirt.
The local crucifix sculpture in Córdoba, designed in 1794 by Juan Navarro León, is surrounded by a fence beset with lanterns to keep graffiti taggers away. However a protective layer of Protectosil ANTIGRAFFITI® repels much more effective not only graffiti but also rain and dirt.
Six new parking levels of the Ala Moana Center in the Hawaiian capital of Honolulu, the world‘s largest open-air shopping mall, are treated with the resource-conserving Protectosil® BHN. Its 290 shops and one of the world‘s largest food courts attract over 40 million visitors every year. Thanks to the product‘s quick drying properties, the parking areas were closed for only a short time. This hydrophobic treatment deeply penetrates the concrete pores to provide effective protection against scaling, dirt accumulation and stains.
Six new parking levels of the Ala Moana Center in the Hawaiian capital of Honolulu, the world‘s largest open-air shopping mall, are treated with the resource-conserving Protectosil® BHN. Its 290 shops and one of the world‘s largest food courts attract over 40 million visitors every year. Thanks to the product‘s quick drying properties, the parking areas were closed for only a short time. This hydrophobic treatment deeply penetrates the concrete pores to provide effective protection against scaling, dirt accumulation and stains.
Every year, approximately 400,000 adventure seekers visit the complex of the Sunny Florida amusement parks on an area of some 15,000 hectares, a must see for all fans of Mickey Mouse and friends. The food courts and pool areas have been treated with the almost VOC-free Protectosil® BHN PLUS since the spilling of coffee, soda, ketchup, mustard and other condiments are easily cleaned without the use of harsh chemicals saving on cost and labor to clean.
Every year, approximately 400,000 adventure seekers visit the complex of the Sunny Florida amusement parks on an area of some 15,000 hectares, a must see for all fans of Mickey Mouse and friends. The food courts and pool areas have been treated with the almost VOC-free Protectosil® BHN PLUS since the spilling of coffee, soda, ketchup, mustard and other condiments are easily cleaned without the use of harsh chemicals saving on cost and labor to clean.
The white marble Beylerbeyi Palace in Istanbul was built between 1861 and 1865 and served as a summer residence and a place to entertain visiting heads of state. The marble pillars of the palace gate had been deteriorating for some time. The historic site underwent rejuvenation treatment with Protectosil® SC 60 to form uniquely beautiful scenery with the many blossoming magnolia trees in the palace garden for many years to come.
The white marble Beylerbeyi Palace in Istanbul was built between 1861 and 1865 and served as a summer residence and a place to entertain visiting heads of state. The marble pillars of the palace gate had been deteriorating for some time. The historic site underwent rejuvenation treatment with Protectosil® SC 60 to form uniquely beautiful scenery with the many blossoming magnolia trees in the palace garden for many years to come.
280 yards and 48 floors high, the Transamerica Pyramid is a prominent landmark and the tallest building of the San Francisco skyline. The building features two wing-like components for elevators and emergency escapes for earthquake protection. Cleaning the windows takes several days. Accordingly, taping the windows and window frames prior to applying a surface protection agent on the facade would have cost considerable time and money. Because Protectosil® CHEM-TRETE® BSM 400 does not leave any residue on glass or metal, operators decided in favor of treating the building efficiently with Protectosil®.
280 yards and 48 floors high, the Transamerica Pyramid is a prominent landmark and the tallest building of the San Francisco skyline. The building features two wing-like components for elevators and emergency escapes for earthquake protection. Cleaning the windows takes several days. Accordingly, taping the windows and window frames prior to applying a surface protection agent on the facade would have cost considerable time and money. Because Protectosil® CHEM-TRETE® BSM 400 does not leave any residue on glass or metal, operators decided in favor of treating the building efficiently with Protectosil®.
Times Square in New York City with its colored electrical billboards continues to be an attraction for tourists. The highly frequented walkways in the pedestrian zone are impregnated with Protectosil® BHN PLUS, a hydrophobic and oleophobic product that effectively repels water, oil, and water-soluble contaminants, giving graffiti artists no chance.
Times Square in New York City with its colored electrical billboards continues to be an attraction for tourists. The highly frequented walkways in the pedestrian zone are impregnated with Protectosil® BHN PLUS, a hydrophobic and oleophobic product that effectively repels water, oil, and water-soluble contaminants, giving graffiti artists no chance.
Even mighty constructions such as the 36 km long Hangzhou Bay Bridge, connecting the Chinese metropolis Shanghai with Ninbo, would be fully exposed to the forces of nature in the long term, were it not for timely protective treatment. The 7,000 bridge piers firmly embedded in the bottom of the sea, with a height of 70 meters each, were therefore treated with 40,000 liters of Protectosil® CIT. This advanced corrosion inhibitor based on organofunctional silanes deeply penetrates the concrete to effectively repel water and pollutants.
Even mighty constructions such as the 36 km long Hangzhou Bay Bridge, connecting the Chinese metropolis Shanghai with Ninbo, would be fully exposed to the forces of nature in the long term, were it not for timely protective treatment. The 7,000 bridge piers firmly embedded in the bottom of the sea, with a height of 70 meters each, were therefore treated with 40,000 liters of Protectosil® CIT. This advanced corrosion inhibitor based on organofunctional silanes deeply penetrates the concrete to effectively repel water and pollutants.
A protective layer based on Protectosil® covers the Willibrordi Cathedral in Wesel, Germany, and shields the late-Gothic architectural masterpiece from contamination, moisture and harmful weather and environmental influences.
A protective layer based on Protectosil® covers the Willibrordi Cathedral in Wesel, Germany, and shields the late-Gothic architectural masterpiece from contamination, moisture and harmful weather and environmental influences.
Built originally in medieval times and repeatedly rebuild, the Moyland Castle in North-Rhine Westphalia, Germany, has to combat against the ravages of time like most of buildings and monuments. The tower walls of the impressive brick building and the world‘s largest collection of Joseph Beuys’ works in the castle museum are now reliably protected against moisture, thanks to Protectosil® BSM 400.
Built originally in medieval times and repeatedly rebuild, the Moyland Castle in North-Rhine Westphalia, Germany, has to combat against the ravages of time like most of buildings and monuments. The tower walls of the impressive brick building and the world‘s largest collection of Joseph Beuys’ works in the castle museum are now reliably protected against moisture, thanks to Protectosil® BSM 400.
The famous Lotus Temple in the Indian capital of New Delhi is the latest building of by now eight Bahai houses of worship worldwide. The effect of treating the structure with Protectosil® BSM 400 is a good match for the shape of the temple: water runs off in beads, taking dirt particles accumulated on the surface with it.
The famous Lotus Temple in the Indian capital of New Delhi is the latest building of by now eight Bahai houses of worship worldwide. The effect of treating the structure with Protectosil® BSM 400 is a good match for the shape of the temple: water runs off in beads, taking dirt particles accumulated on the surface with it.
Every day, some 35,000 vehicles cross the Commodore Barry Bridge over the Delaware River. It is the longest cantilever bridge in the USA, connecting Bridgeport, New Jersey with Chester, Pennsylvania. Because of cracks in the road surface, salt, water and dirt were able to reach the reinforcement steel of the bridge. To stop the advancing corrosion, some 108 square yards of the bridge roadway were treated with Protectosil® CIT, a water-vapor permeable and therefore breathable protective layer, during renovation work.
Every day, some 35,000 vehicles cross the Commodore Barry Bridge over the Delaware River. It is the longest cantilever bridge in the USA, connecting Bridgeport, New Jersey with Chester, Pennsylvania. Because of cracks in the road surface, salt, water and dirt were able to reach the reinforcement steel of the bridge. To stop the advancing corrosion, some 108 square yards of the bridge roadway were treated with Protectosil® CIT, a water-vapor permeable and therefore breathable protective layer, during renovation work.
A resident group initiated the reconstruction of the city hall of Wesel in Germany, built with sandstone and constructed in 1455. The building is recognized as a masterpiece of late gothic, Flemish architectural style. Protectosil® SC CONCENTRATE shields the facade against contaminants by harmful environmental effects and vandalism. Additionally, a graffiti protection prevents pollution of the building surface by graffiti.
A resident group initiated the reconstruction of the city hall of Wesel in Germany, built with sandstone and constructed in 1455. The building is recognized as a masterpiece of late gothic, Flemish architectural style. Protectosil® SC CONCENTRATE shields the facade against contaminants by harmful environmental effects and vandalism. Additionally, a graffiti protection prevents pollution of the building surface by graffiti.
Darmstadt‘s long theater tradition already started in the 17th century. Today, the State Theater, consisting of the small and the grand hall as well as the chamber theatre can seat approximately 2000 people. The building with its noticeable portal and bright marble facade highlighted with shiny brass panels is protected with Protectosil ANTIGRAFFITI® so that graffiti vandalism no longer has a chance, since the paints do not adhere to the treated surfaces.
Darmstadt‘s long theater tradition already started in the 17th century. Today, the State Theater, consisting of the small and the grand hall as well as the chamber theatre can seat approximately 2000 people. The building with its noticeable portal and bright marble facade highlighted with shiny brass panels is protected with Protectosil ANTIGRAFFITI® so that graffiti vandalism no longer has a chance, since the paints do not adhere to the treated surfaces.
Storebaelt Bridge crosses the Great Belt to connect Danish islands of Funen and Zealand, providing an easy travel route from Germany to Sweden. The world’s third longest bridge with a length of 2,694 meters and a main span of 1,624 meters is coated with the eco-certified Protectosil® BHN. Wind, weather, and traffic conditions both within and high above the sea create some special challenges for operation and maintenance. The impregnation with Protectosil® protects the structure against water and water-soluble contaminants, keeping the traffic rolling day in, day out.
Storebaelt Bridge crosses the Great Belt to connect Danish islands of Funen and Zealand, providing an easy travel route from Germany to Sweden. The world’s third longest bridge with a length of 2,694 meters and a main span of 1,624 meters is coated with the eco-certified Protectosil® BHN. Wind, weather, and traffic conditions both within and high above the sea create some special challenges for operation and maintenance. The impregnation with Protectosil® protects the structure against water and water-soluble contaminants, keeping the traffic rolling day in, day out.
The famous, five-story Metropolitan Store in Cologne, Germany, attracts attention by its 4,900 square-meter glass facade consisting of 6,800 individual glass panes and 66 laminated larch wood timbers. Due to the location close to a busy transport axis the building needs to be protected against dust and exhaust particles that Protectosil ANTIGRAFFITI® repels permanently. Our product shields the 2,200 square-meter Portuguese limestone surface from graffiti scribbles as well.
The famous, five-story Metropolitan Store in Cologne, Germany, attracts attention by its 4,900 square-meter glass facade consisting of 6,800 individual glass panes and 66 laminated larch wood timbers. Due to the location close to a busy transport axis the building needs to be protected against dust and exhaust particles that Protectosil ANTIGRAFFITI® repels permanently. Our product shields the 2,200 square-meter Portuguese limestone surface from graffiti scribbles as well.
Heavily loaded railroad cars roll over kilometers of railroad tracks from the coal mines to the ports, where the energy resource is loaded and shipped all over the world. The enormous strain and contact with water have over the years led to heavy cracks and some weakening in the concrete ties underneath the tracks. The treatment with Protectosil® BHN prevented further water ingress and stopped the expansion of the alkaline silica reaction.
Heavily loaded railroad cars roll over kilometers of railroad tracks from the coal mines to the ports, where the energy resource is loaded and shipped all over the world. The enormous strain and contact with water have over the years led to heavy cracks and some weakening in the concrete ties underneath the tracks. The treatment with Protectosil® BHN prevented further water ingress and stopped the expansion of the alkaline silica reaction.
The "School of Design" in Essen, Germany, located in the area of the world cultural heritage, charming with its original, modern facade structure, is protected with Protectosil® SC 100 and Protectosil ANTIGRAFFITI® to keep the surface of the bright exposed concrete with differently sized, eye-catching windows clean.
The "School of Design" in Essen, Germany, located in the area of the world cultural heritage, charming with its original, modern facade structure, is protected with Protectosil® SC 100 and Protectosil ANTIGRAFFITI® to keep the surface of the bright exposed concrete with differently sized, eye-catching windows clean.
Products & Solutions

Come and join us on a world trip

Evonik made a contribution to each of the reference buildings presented in the photo gallery at the top of this page. Especially in the case of bridges and roads that must be financed by public funds, is a real need for restructuring requirement. Protectosil® helps prevent damage to the building structure, leading to save repair, maintenance and energy costs. Protectosil® products extend the service life of our public infrastructure.

Sustainable and successful – Our competencies in the field of building protection are manifold


With products under the brand Protectosil® Evonik Resource Efficiency has developed a sustainable and forward-looking product range for building protection purposes. Sustainability and responsible handling of resources are becoming increasingly important in building protection, as in other areas. The development and use of environmentally compatible products like the eco-certified Protectosil® BHN is a fundamental aspect of Evonik’s business philosophy.

Our skills cover a large variety of applications such as corrosion control, essential for the stability of infrastructure buildings like bridges or tunnels and water-repellent impregnation of mineral substrates. Since humidity is the major enemy of the building material. Furthermore, we offer numerous products for the protection of surfaces, including the right product shielding buildings against external impact factors like pollution by graffiti or harmful environmental and weathering influences. Buildings, monuments, parking garages and bridges are threatened by increasing degradation.

Particularly in the case of bridges that have to resist growing traffic volumes, the deterioration is critical. Silane-based corrosion inhibitor systems like Protectosil® CIT help protect against corrosion. The product suppresses the corrosion mechanism and is even suitable for repairing structures that have already been affected.

We have developed a series of products like Protectosil ANTIGRAFFITI® and Protectosil® SC, designed to meet the particular requirements in the area of graffiti control and surface protection. Whether algae, moss, coffee or tea or graffiti attacks our product guarantee excellent results, are almost VOC-free and easy to apply.

Building structures made of natural stones become brittle quickly due to natural forces whereby stones considerably lose in strength. In addition, our Protectosil® SH products form a protective network in the interior of the material, optimizing its stability.

Brochures and global reference objects