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Treatments for stone materials

Treatments for stone materials

Here you are method statements related to treatments for stone materials

Stone material, in all its architectural applications suffers daily attacks from many degradation factors, which should be neutralized with decision, in order to avoid an irreversible deterioration.

Kimia has developed a series of products and application cycles for cleaning, consolidation and protection of stone materials, with the goal of preserving and protecting "the stone" with effective methods, compatible, capable of acting selectively on the causes of degradation, while safeguarding the structure.

Please find method statements for the following cycles:

► Elimination of biodeteriorating organisms
► Cleaning of the surface
► Cortical consolidation
► Hydrophobic impregnation
► Anti-graffiti treatments

Elimination of biodeteriorating organisms

Disinfestation and cleaning of render and brick, stone or tuff masonry infested with biodeteriorating organisms, by applying a wide-spectrum, water-based, anti-mould and anti-mildew biocide solution with a brush, roller or spray (such as Kimistone BIOCIDA) before painting or applying water-repellent treatments on “exposed” masonry.

Cleaning of the surface

In case of old surfaces, the choice of the right cleaning depends on the type of dirt: cold water is sometimes sufficient. Cleaning the surface with hot water or steam is particularly recommended if oil or grease is present. 

  • In case of compact, carbonate stone, the alkaline cleaner Kimistone C10.10 can be used (the product solubilises grease). 
  • For delicate stone materials, Kimistone C957 can be adopted (the product slowly solubilises coherent atmospheric dirt and softens black crusts without altering the stone's original patina).
  • In order to clean compact silicate stone, removing calcifications and encrustations, the strong acid cleaner Soluzione P can be used.

All cleaners may be applied (diluted or not) to dry surfaces with a brush or low pressure spray gun, being careful to soak the support thoroughly. Scrub vigorously until a foam forms then leave to take effect. Reaction time usually varies from 10 to 30 minutes.

On completion, rinse thoroughly with a high-pressure washer, if suitable for the type of support. Otherwise run water over the surface until all residues have been removed. Always carry out a patch test before cleaning the whole surface.

Cleaning of the surface

Cortical consolidation

Supply and application of Kimistone KSF for cortical consolidation (or of Kimistone K55 or Kimistone K10 for cortical consolidation and hydrophobization) of various types of “weak” or “crumbling” substrate, including those of historical or artistic interest (porous stone, bricks, tuff, installation mortar, render, etc.), by impregnation.

Apply the product after adequate preparation of the substrate by low-pressure hydro-cleaning the surface, where possible, to remove all traces of grease, oil, paint and any other substance which could prevent the product penetrating into the substrate, to obtain a clean, sound, compact substrate with no loose portions and no traces of dust, dirt, mildew or soluble salts. 

Apply several coats of the product on the dry substrate by spray with low-pressure, manual spray equipment, with a brush or by roller, according to the absorption and porosity of the substrate.

Hydrophobic impregnation

Kimistone IDROREP, Kimistone IBASIL or Kimistone ANTISMOG must be applied on dry surfaces (water obstacles penetration of the product). To apply the product evenly, it is advisable to use a manual shoulder-mounted sprayer for large surfaces and a roller or brush for smaller surfaces or for walls with many windows. 

Once the protective has been applied, the surface cannot be painted. Any painting must therefore be done beforehand using inorganic paints (silicate paint, for example).

Hydrophobic impregnation

Anti-graffiti treatments

Apply the graffiti remover Kimistone GRAFIX MOOVE S to completely dry surfaces (as water will impede its action) with a brush or roller working from the bottom up, covering dirty and surrounding areas (to ensure that when the paint starts to dissolve and run, it will not damage any surrounding clean areas). Leave to take effect for 20 to 30 minutes then scrub vigorously and rinse with a pressure washer as appropriate. Reaction time will be longer when more than one layer of graffiti needs to be removed. In these cases, as the dissolved paint starts to run, remove it with absorbent paper then add more product to the remaining paint. On completion when all paint has been dissolved, rinse with a pressure washer.

In order to protect stone materials and structures from the spray paint used in graffiti, preventing it from penetrating deep into the material, on clean, dry surfaces apply the sacrificial protector Kimistone DEFENDER using a lowpressure spray gun or natural fibre brush. The number of coats required will depend on the absorption of the substrate: at least two coats are recommended, to be applied wet on wet while the previous coat is still fresh. Do not allow excess product to build up on the surface, and do not apply at high temperatures, in direct sunlight, during frost or strong wind. Graffiti made on surfaces treated with sacrificial protector will be easily removed with a warm water/steam jet washer (max. +80-90 °C).

Anti-graffiti treatments

Info & Technical Support

Other method statements here. If you want to get further info or technical support please fill in the form to get in touch with our Technical Department.

Eng. Diego Aisa, Chief of Export Department

Ing. Diego Aisa, Chief of Export Department

Hello! I am Diego Aisa, I am a structural engineer. I began working for Kimia in 2007. I manage international key contacts and I am Chief of Export Department. I like travelling and I got a thing for photography! Find here my contacts. My Linkedin profile.

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Kimia S.p.A.

Via del Rame, 73
06134 - P.te Felcino
Perugia (PG) - Italia

Phone:
+39 075 591 80 71
Fax:
+39 075 591 33 78
Email: info@kimia.it

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