Question 1               
It is not possible to wash the stone well. It looks good while it is wet, but when it dries it gets stained.
Answer 1
Washing the stone means using a great quantity of water. While washing water gets inside the stone, dissolves one of its parts and brings dissolved salts to the surface. After the water evaporates dissolved salts remain on the surface making sediments of white, yellow, brown or some other color. Using cleaning and washing products ECO RECEPT 01, ECO RECEPT 02 and ECO RECEPT 03 such stains can be removed. Protecting stone with the ECO IMPREGNIR MK prevents the appearance of stains of salt (so-called salting) on the stone upon wetting, whether it is washing with water or rain.
Question 2
Stone in the floor inside the object gets dirty a lot. It is very hard or impossible to remove all the stains.
Answer 2
In the greatest number of cases it is possible to clean and wash the stone no matter how much it is stained. Organic stains are most frequently removed using an alkaline cleaning product ECO RECEPT 02, while non-organic are removed with acidic ECO RECEPT 01. The question is how payable it is to thoroughly clean the stone.
Question 3
Marble tables in the café are stained with coffee and some drinks.
Answer 3
Organic impurities (coffee, drinks, fruit juices etc.) can be removed from marble using alkaline cleaning and washing product ECO RECEPT 02.
Question 4
Stone on the facade has faded and looks poor.
Answer 4
By the time stone fades due to the weathering: water (precipitation), frost and sunshine. Wind brings various dust particles which mechanically damage the stone. After washing, the color and appearance of such stone can be improved using protective products ECO IMPREGNIR MK, ECO IMPREGNIR ME and ECO IMPREGNIR A.
Question 5
The fence built of stone falls apart in the lower part, near the ground. This can be seen when the yard is being cleaned (we find parts of stone and mortar).
Answer 5
Stone placed close to the ground or in a direct contact gets much wetter than the part which is at the top of fence. Consequently, damages are first noticed there. Stone which has just started deteriorating and has suffered insignificant damage needs to be protected with the product ECO IMPREGNIR MK. Stone which is already falling apart needs to be strengthened (stone consolidation) using ECO CONSOLID K, then protected with ECO IMPREGNIR MK.
Question 6
Stone is peeling off.
Answer 6
There are types of stone possessing such a structure which, regardless of the exploitation conditions, constantly peels off (e.g. “Struganik” limestone). Such stone is washed with water under pressure with the addition of cleaning and washing products ECO RECEPT 01 and ECO RECEPT 02. This way top layers of the stone which started peeling off are being removed. Stone is protected with the product ECO IMPREGNIR MK and that way further peeling is largely prevented. Stone peeling caused by aging should first be strengthened (consolidated) using ECO CONSOLID K, and then conserved with the products ECO IMPREGNIR K and/or ECO IMPREGNIR MK.
Question 7
Stone is falling off in the form of sand.
Answer 7
This type of damage most commonly occurs in sandstone. Over time the connection between the sand particles and binder, which together make the sandstone, weakens due to the deterioration of binder and that’s why the stone starts falling off. Such a damaged stone should first be consolidated with the product ECO CONSOLID K, and then conserved with products ECO IMPREGNIR K and/or ECO IMPREGNIR MK.
Question 8
Stone foundation of an old building is quite damaged. Previously somebody tried to fix (patch) the stone with concrete (mortar). It all looks ugly and not in harmony with the structure and original color of the stone.
Answer 8
Unsuccessful repairs are very often. Dealing with an old object which is under state protection or important for some other reason, requires consent of the Institute for the Protection of Cultural Monuments prior to the start of works.
Concrete (mortar) parts that were additionally built need to be carefully removed. Prior to restoration stone is cleaned and washed using detergents ECO RECEPT 01, ECO RECEPT 02 and water under pressure, if necessary. Restored stone keeps its former, original shape. Upon the completion of the restoration works, conservation of the whole stone foundation is performed using products ECO IMPREGNIR K and/or ECO IMPREGNIR MK.
Question 9
An old object. Bigger and smaller parts of stone massif are missing.
Answer 9
Repair (restoration) of such stone is done by experts with extensive experience in that field. If the object is of cultural and historical importance, it is necessary to acquire the consent of the Institute for the Protection of Cultural Monuments and adequate supervision. Company HEMI ECO performs these works very successfully.
Question 10
Stone wall is 60cm thick. However, upon heavy rain water passes through the wall and gets into the object.
Answer 10
Stone wall which lets the rain get in should be carefully examined. Reasons for such state can be ruined joints between the stone blocks, porous stone or the both.
Old joints if bad need to be replaced with new ones created of the permanently elastic material. In order to achieve better adhering parts of stone connected by joints are treated with the product ECO POLYMER D. After the joints get dry the whole stone is conserved with the protection product ECO IMPREGNIR MK. Waterproofness and water impermeability of the stone are achieved in this manner.
Question 11
Part of the foundation close to the ground starts falling apart.
Answer 11
Stone in contact with the ground is almost always wet. Humidity is often one of the causes of stone deterioration. The second cause can be humic acid from the ground, which is evident in the case of limestone. Both problems can be solved with the conservation of stone using the product ECO IMPREGNIR MK.
Question 12
I lose water from reservoir with drinking and technical water.
Answer 12
Water reservoir should be thoroughly examined before the cause of water loss is determined. Water loss caused by the porosity of the stone is solved by coating the reservoir floor and walls with two or more layers of the product ECO IMPREGNIR WN. ECO IMPREGNIR WN sustains the pressure of 80m water pillar (8bar) and it is medically valid.
Water loss caused by the damage of joints or stone is solved by creating new joints out of permanently elastic material, in other words by stone restoration. Upon the completion of restoration, reservoir floor and walls are conserved with the product  ECO IMPREGNIR WN.
Question 13
Moss and lichen appear on the stone facade, at the northern part of the object. Facade is sandblasted, but after some time the same occurrence is repeated.
Answer 13
Moss and lichen appear on the facade because of humidity. Northern side of the object, by rule, is always the least lighted and the most humid. Consequently, there are the best conditions for the growth of these organisms. Sandblasting the facade mechanically removes moss and lichen, but only temporarily. The problem of humidity remains and after some time lichen appears again. Facade needs to be washed with the detergent ECO RECEPT 02, which degrades organic substance, and water under pressure. After drying, the facade is conserved using protection product ECO IMPREGNIR MK.
Question 14
Facade of marble slabs has become chapped. Cracks are barely noticeable. However, a couple of slabs have broken and fallen off the facade.
Answer 14
Tiny cracks are enlarged in time by the influence of water and frost causing the marble slabs to break and fall off the facade. ECO POLYMER D is used for sealing such cracks in marble slabs. Protection achieved by using the product ECO IMPREGNIR MK prevents slabs from getting wet and the influence of frost.
Question 15
In time grooves appear on the stone, exclusively on those parts whose color differs from the rest of the stone.
Answer 15
This appearance is typical for the stone with brecciated structure (arteries of clay represent the joining material). In time water washes out clay and that is the main reason why the stone crumbles. This type of stone is best conserved with the product ECO IMPREGNIR MK while it’s still new. Damaged stone should be strengthened (consolidated) prior to conservation, using products ECO CONSOLID K and ECO IMPREGNIR K.
Question 16
Certain stone plates on the terrace have “risen”. In some places terrace looks a bit wavy.
Answer 16
Stone plates built in without joints when heated, due to expansion, partially or over the entire surface can be “lifted”. Similar thing can happen to ceramic tiles.
Question 17
For the second time I am pointing up joints on stone plates in the yard. After some time joints fall apart.
Answer 17
Low quality or inappropriate material for pointing up can often be the cause of fast deterioration of joints. The second cause can be insufficiently broad joints which break due to the expansion and shrinking of the material. Stone which is expanded due to heating practically crushes the joint. Joints made of permanently elastic material prepared with the addition of ECO POLYMER D are the only solution to this problem.
Question 18
Yellow-brown stains of different dimensions appear on marble plates of the facade. Marble slabs are placed on a cement mortar.
Answer 18

Yellow-brown stains on marble plates often occur as the consequence of corroded concrete iron. Depending on the type of marble and finishing cleaning is performed by using the products ECO RECEPT 01, ECO RECEPT 02, ECO RECEPT 03 and water under pressure. In this case cleaning of marble is complicated, long, expensive and only in some cases produces satisfactory results. By conserving the marble further appearance of stains can be prevented.
The best effects are achieved by conserving marble before building in or immediately after building in. Conservation is done with the protection materials ECO IMPREGNIR K and ECO IMPREGNIR MK.

Question 19
Facade stone has become grayish.
Answer 19
Gray color originates from cement milk brought to the stone surface by water, while mortar or concrete is being washed out. Cement milk is removed from the stone by using water under pressure and cleaning products ECO RECEPT 01 and ECO RECEPT 02. Repeated appearance of cement stains is prevented by conservation of stone using products ECO IMPREGNIR K and ECO IMPREGNIR MK.
Question 20
Stone wall is marked with graffiti.
Answer 20
Graffiti on the stone can be removed by using cleaning and washing products ECO RECEPT 01, ECO RECEPT 02 and water under pressure of 120-140bar. Cleaned wall can be protected from graffiti with the product for anti-graffiti protection ECO IMPREGNIR A.
Question 21
Stone on a newly built object is smeared with mortar and color.
Answer 21
Mortar and colors that the stone is smeared with can be a big problem if the stone is porous (e.g. sandstone). Stone can be partially cleaned mechanically (trowel, brush, water under pressure). However, impurities which “entered” the stone structure can be cleaned only chemically. The products that are applied are ECO RECEPT 01, ECO RECEPT 02 and water under pressure.
Question 22 Stone is weak and crumbles. Can it be somehow strengthened?
Answer 22
Consolidation is the procedure of strengthening construction material. Using the product for consolidation ECO CONSOLID K it is possible to strengthen the stone so much that its force of fracture is increased by 3,12 times on average. In other words if a weak stone has 3MPa force of fracture, after consolidation its force of fracture is over 9MPa.
Question 23
Stone monument is collapsing. Plants and moss grow out of the stone.
Answer 23
Plants and moss which grow from the monument are mechanically removed and the monument is carefully washed and cleaned with the product ECO RECEPT 02 and water. Missing parts of stone are rebuilt. Stone which is collapsing needs to be strengthened. Stone consolidation is done combining the products ECO CONSOLID K, ECO POLYMER D and ECO IMPREGNIR K. Upon the completion of all the repairs, restoration and consolidation, the monument is conserved with the product ECO IMPREGNIR MK. Anti-graffiti stone protection is performed after conservation using the product ECO IMPREGNIR A.
Question 24
Newly set granite in bathrooms looks very nice when it’s wet, but when it dries it loses color and unusual white film appears.
Answer 24
First, granite needs to be cleaned and washed with using detergents ECO RECEPT 01, ECO RECEPT 02 and water under pressure, then protected using the product ECO IMPREGNIR MK. If you wish to emphasize granite color and structure, we recommend additional protection with the product ECO IMPREGNIR ME. After this kind of protection the stone will look wet.
Question 25
Routine maintenance of stone flooring.
Answer 25
Means for the routine maintenance of stone flooring and other stone surfaces are ECO RECEPT 01mod and ECO RECEPT 02mod.
Question 26
Durability of the stone protection.
Answer 26
Attestations for our protection products show that conserved construction material doesn’t age. According to our previous knowledge, stone protection can last longer than 15 (fifteen) years.
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