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nano coating of mineral and porous surfaces

Sandstone and limestone have been popular building materials for many centuries. They can be easily cut into precise blocks that are walled into magnificent buildings of all kinds. Built this way, many buildings since Roman times defied the weather – until coal dust and car exhaust turned the rain sour. Today, the rapid deterioration of historic building fabric is viewed with concern in many places. But there is a solution: Nano sealants not only seal porous building materials, they also protect them from chemical attack.

The enemies of mineral and porous surfaces

Water alone hardly affects a facade made of limestone or sandstone. The eroding effect of rain is minimal. However, this is provided that the rainwater is properly drained away via gutters and pipes. If a rain pipe has a leak and water constantly runs down the house wall at a certain point, a visible trace will quickly appear there even on the firmest stone. No nano-sealing will help here, only an intact drainage of the rainwater. If the pH content in the water rises due to soot, carbon dioxide and other exhaust gases, then even normal rain can affect a facade. “Acid rain” has only a slightly increased pH value. But this is enough to dissolve mineral and porous surfaces. As soon as the acid rain has created the smallest capillaries, water can penetrate and linger in the surface.

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Architektur und Baugewerbe (Außen und Innenflächen)

Deprive the mold of the basis of life

Then all it takes is one cold frosty night. The water expands as it solidifies into ice and blasts the facade open more and more. There is no need to worry about structural stability, because this process takes place in the range of millimeters. However, the facade becomes increasingly unsightly over the years. In particular, strongly structured surfaces, such as sand-lime facing bricks with broken outer edges, lose their characteristic appearance. In addition, the capillaries are ideal attack points for mosses and lichens. Although these do not destroy the building fabric, they do give the facade a very dirty, weathered and unkempt appearance.

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Dem Schimmel die Lebensgrundlage entziehen

Sealing mineral and porous surfaces

To protect a facade from progressive weathering, sealing is the best option. This is especially true for historic buildings, for which plastic or metal paneling is not an option. There are two approaches to sealing facades:

  • Epoxy resin
  • SiO2-based nano-sealer

Epoxy resin consists of two components. Depending on the mixing ratio, the resin becomes thicker or thinner. After curing, the epoxy resin creates a closed surface. It is available in all colors. This makes it possible to seal and repaint painted facades in a single operation. Epoxy resin is sprayed on. In the liquid state, it penetrates into the capillaries of the masonry.

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Your advantages with Nano-Care

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Sustainable

Only a closed nano-sealing consisting of Nanoflex TPM 300 as primer and Nanoflex AG 1-4 as stain protection guarantees that no more water can penetrate the building fabric.

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Protection with lotus effect

On the outside, the sealant hardens into an almost invisible film. This film finishes with a special feature: after solidification, the surface has a structure that has a “lotus effect”.

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Self-cleaning

The lotus effect is named after the lotus flower. Microscopic “bumps” ensure that no new dirt can adhere to the surface. The facade therefore cleans itself with every rain shower and shines again as if freshly painted.

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Possible applications of epoxy resin and nano coating

Epoxy resin consists of two components. Depending on the mixing ratio, the resin becomes thicker or thinner. After curing, the epoxy resin creates a closed surface. It is available in all colors. This makes it possible to seal and repaint painted facades in a single operation. Epoxy resin is sprayed on. In its liquid state, it penetrates the capillaries of the masonry. Thus, it not only holds very well to the wall due to a lasting anchorage. It also creates a closed, air- and water-tight surface. To the outside, clear epoxy darkens the surface a little and creates a glossy effect. However, its use should be chosen wisely. Epoxy resin is sensitive to UV light. With constant exposure to sunlight, it becomes cracked and cloudy. Its restoration is extremely difficult and, as a rule, does not work without damaging the building fabric. Epoxy resin is therefore suitable mainly for interior use. It is very popular for sealing concrete. For facades, therefore, nano-sealing made of silicon oxide such as Nanoflex AG 1-4 or TPM 300 is preferred. Silicon oxide is basically little more than normal, extremely finely ground sand. To create a waterproof surface, this sand is mixed with silicone slurry. The rubbery material is so thin that it can also penetrate deep into the capillaries. Mineral and porous surfaces can be sealed with it to a depth of 2 cm.


Imagine invisible protection that can keep out up to 95% of soiling and 98% of mosses, lichens and fungi from absorbent materials such as stones, concrete, clinker or terracotta – for a period of up to 10 years*.

Nanoflex® AG 1-4 creates an ultra-thin breathable 3D network at the substrate surface, which permanently keeps water and dirt out of the pore system. Coated materials can thus increase resistance to freeze-thaw testing by a factor of 3 (EN 1338) and remain clean for over a decade.

Its water- and dirt-repellent properties on all mineral and absorbent surfaces additionally increases the range of applications to the field of monument protection and sand.

The strong chemical bond to the OH groups of the surfaces ensures extraordinary permanence in terms of weather resistance, as well as mechanical and chemical resistance.

Due to the intelligent arrangement of hybrid (organic and inorganic) structures, Nanoflex® AG 1-4 is part of the INTELLIGENT HYBRIDS® concept of the Nano-Care Deutschland AG.

* It should be noted that the initially strong beading effect may weaken after a few years due to the overlay of very fine dust particles. However, this in no way impairs the protection.

Specifications
Chemical base: Modified silica
Layer thickness: approx. 100-150 nm
Water repellency: between 130° and 150° (20μl)
Oil repellency: between 120° and 130° (20μl)
Glide angle: not applicable
Temperature stability: 250°C permanent, 450°C peak
Chemical stability: between pH 1 and pH 13
Weathering resistance: 3500h according to ISO 11507 A
Resistance (mechanical): depending on substrate
Salt water resistant: yes
Transparency: 100%
Storage stability: 2 years
Temperature sensitivity: 1°C to 30°C
Consumption: 80 – 150 ml/m2
Application: The coating liquid is applied to the surface by standard pump spray systems. If the substrate cannot absorb the liquid immediately, the use of a paint roller is recommended to ensure uniform wetting. The coating is stable to water after approx. 6 hours and fully cured after 24 hours. The product can also be applied after deep hydrophobization of the surface by Nanoflex® Infusion. The pretreatment should be allowed to flash off for 5 days before Nanoflex® AG 1-4 is used as top coat.

Nanoflex® AG 1-4 is additionally available in the quality grades VP 172 and AG. These formulations contain a lower (VP 172) or higher (AG) proportion of active components. The product is water-based and not a hazardous material according to ADR and IATA. It can also be shipped as a liquid concentrate (Nanoflex® Concentrate SP).

For handling Nanoflex® AG 1-4 please refer to the corresponding safety data sheet.

The high-performance product penetrates deeply into absorbent mineral substrates such as stone, concrete, clinker or terracotta and protects against hydrostatic pressure and rising water.

Nanoflex® Infusion creates an ultra-thin breathable 3D network in the depth of the pore system, which permanently keeps out pressing water, and is thus certified according to DIN EN 1504 – 2.

Its water- and dirt-repellent properties on all mineral and absorbent surfaces additionally increases the range of applications to the field of monument protection.

The strong chemical bond to the pore system of the surfaces ensures extraordinary permanence in terms of weather resistance as well as mechanical and chemical resistance.

Due to the intelligent arrangement of hybrid (organic and inorganic) structures, Nanoflex® Infusion is part of the INTELLIGENT HYBRIDS® concept of the Nano-Care Deutschland AG.

Specifications
Chemical base: Modified silica
Coating thickness: not applicable
Water repellency: not applicable
Oil repellency: not applicable
Glide angle: not applicable
Temperature stability: 250°C permanent
Chemical stability: between pH 1 and pH 14
Weathering resistance: 3500h according to ISO 11507 A
Resistance (mechanical): very high
Salt water resistant: yes
Transparency: slight color deepening possible
Storage stability: 2 years
Temperature sensitivity: -3°C to 30°C
Consumption: 130-300 ml/m2
Application: The coating liquid is applied by flooding it thoroughly, allowing it to flow against the surface without pressure. The coating is stable to water after approx. 24 hours and fully cured after 5 days.

Nanoflex® Infusion is ready for use. The product is solvent-based and a dangerous good according to ADR and IATA.

For handling of Nanoflex® Infusion please refer to the corresponding safety data sheet.

The application system AG System Coat consists of a permanent protective layer that prevents paint particles from penetrating the pore system of the mineral surface. This also keeps out over 95% of soiling and 98% of mosses, lichens and fungi from absorbent materials such as stones, concrete, clinker or terracotta – for a period of up to 10 years*.

Nanoflex® AG System Coat creates an ultra-thin breathable 3D network at the substrate surface, which permanently keeps water and dirt out of the pore system. Coated materials can thus increase resistance to freeze-thaw testing by a factor of 3 (EN 1338) and remain clean for over a decade.

Its water- and dirt-repellent properties on all mineral and absorbent surfaces additionally increases the range of applications to the field of monument protection and sand.

The strong chemical bond to the OH groups of the surfaces ensures exceptional permanence in terms of weather resistance and mechanical and chemical resistance.

The graffiti remover Nanoflex® AG System Clean, which is matched to the formulation, allows residue-free removal of graffiti over 10 cleaning cycles.

Nanoflex® AG System, through the intelligent arrangement of hybrid (organic and inorganic) structures, is part of the INTELLIGENT HYBRIDS® concept of the Nano-Care Deutschland AG.

* It should be noted that the initially strong beading effect may weaken after a few years due to the overlay of very fine dust particles. However, the protection is in no way impaired by this.

Specifications
Chemical base: Modified silica
Layer thickness: approx. 100-350 nm
Water repellency: between 130° and 150° (20μl)
Oil repellency: between 120° and 140° (20μl)
Glide angle: not applicable
Temperature stability: 250°C permanent, 450°C peak
Chemical stability: between pH 1 and pH 13
Weathering resistance: 3500h according to ISO 11507 A
Resistance (mechanical): depending on substrate
Salt water resistant: yes
Transparency: 100%
Storage stability: 2 years
Temperature sensitivity: 1°C to 30°C
Consumption: 80-200 ml/m2
Application: The coating liquid is applied to the surface by standard pump spray systems. If the substrate cannot absorb the liquid immediately, the use of a paint roller is recommended to ensure uniform wetting. The coating is stable to water after approx. 6 hours and fully cured after 24 hours. The product can also be applied after deep hydrophobization of the surface by Nanoflex® Infusion. The pretreatment should be allowed to flash off for 5 days before Nanoflex® AG System Coat is used as top coat.

After contamination by graffiti, Nanoflex® AG System Clean is applied generously to the surface. The reaction time is 10-15 min. Then rinse off with clear water. If the graffiti is not completely removed, the work step can be repeated several times.


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These questions are frequently asked about nano coating mineral and porous surfaces.


DThe nano sealant for mineral and porous surfaces is sprayed on or applied with a tassel or lambskin roller. However, this requires some preliminary work. First, the facade is thoroughly cleaned with a high-pressure cleaner. This also removes the remains of mosses, lichens, old paint and other dirt. The remains of an old nano coating are also removed during this operation. The result is a fresh, mineral and porous surface that is ready to receive a new nano sealant.
In the second operation, the area to be sealed is dried. It is very important that no water is “trapped” in the structure. It can otherwise cause mold to form on the inside. While a little residual moisture cannot be avoided, the surface should be as dry as possible. The right timing of a facade sealant is therefore also important. Warm spring or summer days are ideal, as during this time the facade is guaranteed to be dry. The sealant is then applied to the facade in several layers. It is important that really no corner is overlooked or forgotten.

Unlike the facade sealant made of epoxy resin, the nano coating is not permanent. It lasts about 2-3 years, then it needs to be renewed. What sounds like a lot of work, however, is rather to be considered as a contribution to the value preservation of the building. Refreshing the facade every 3 years keeps the house visually in an attractive, clean and well-kept condition.

What our customers say


A very professional team!

Nanocare is a reputable company with excellent products, probably the best nanoproducts on the market.
They have been a reliable partner for many years.

Toni Jacquot , NanoProtection, France

Toni Jacquot

We were looking for an innovative company that could provide modern solutions in different business areas. Nano Care took the time to understand who we are as a company and the market in which we operate. So far, we have worked with their building and textile protection products, Dura ceramic coatings for automobiles, and the revolutionary Liquid Guard antimicrobial coating. The feedback we receive from our customers is more than satisfactory. We wholeheartedly recommend working with Nano Care and implementing their solutions.

Grigor Mihov , CEO Nano Coat Bulgaria

Kundenstimme Nano Coat BulgarienGrigor Mihov

As Nano-Care AG sales partner in the international aviation market, we were able to successfully qualify and list the product with the Liquid-Guard technology by AIRBUS as the first product of this kind for the protection of surfaces against viruses and germs in all cabins.
The Liquid-Guard technology for surface coating is a proven result of scientific innovation “Made in Germany”, which will not only currently, but also in the future, play an important role in the protection of our health.
The service and the professional, scientific support as well as the cooperation for us as partners of Nano Care AG, we can only rate as outstanding and exemplary in every respect.
In particular, we would like to thank Dr. Fabienne Hennessen for her work.

Jörg Schukies , AIRDAL GmbH / Decorative Products GmbH; Quality System Manager / Quality Auditor

Kundenmeinung Jörg SchukiesJörg Schukies

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