In case of a highly absorbent surface or a floor which has a poor scratch resistance/hardness, a pretreatment with an OBTEGO silicate is required. The strength of a soft, cementitious surface can thus be increased and at the same time the absorption can be reduced. However, if the floor is of a very poor quality, the treatment with a silicate does not lead to a 100% suitable surface, but certainly to an improvement. Our pre-treatments OBTEGO P-10 and P-20 (or P-20 n.V.) are suitable for reducing the absorption of the floor surface. Those pre-treatments also reduce a color deepening (color enhancement); e.g. if an afterwards application of OBTEGOR-400 is planned. Note: With floor heating, activate heating program (up- and down heading of floor) before applying any impregnation or protection system, otherwise possible residual moisture in the floor could lead to undesirable efflorescence or even hairline cracks. Protection - Impregnation The floor surface must be clean and dry before applying any impregnation. Residual moisture of the floor surface must be controlled. Consider also, that moisture can be exist on the floor if the surface temperature is under the dew point. The floor temperature should therefore always be 3 ° C above the dew point. (see Dew point table on page 43) Generally, it is recommended to make a sample area in an inconspicuous place, since some impregnations can change the color and gloss of the surface. Therefore, the selection of a suitable impregnation should coordinated with the client, based on the requirements and use of the floor in advance. Hydrophobic impregnators and impregnators are non-film-forming surface protection systems. Impregnators can maximum built up a thin film on the surface if applied until saturation of the surface. Impregnators can therefore not provide 100%acid protection, but improve the resistance to acid attack. In addition to simple, water-repellent impregnators, there are also premium solutions with an increased protection against the penetration and soiling of oil and grease. Depending on the floor itself as well as on the applied surface preparation, the effect and duration of the selected protection system can be very different. If there is no experience or in cases of doubt, a sample area should always be appliedwith regard to appearance, protective effect and consumption. The following table shows a brief overviewof theOBTEGO impregnations: * The description of Basic, Plus und Premium means the effectivenes of the protection. However, the functionality of the protection depends of the substrate itself, the surface preparation and the amount of applied impregnation material. Therefore it cannot be specified a time range about the resistance. Basically, products such as R-30 or R-50 do not cause any significant color deepening effect. However, since the material penetrates into the pore structure, the surface naturally appears a little bit richer in color as an untreated area. Product film-forming color deepening effect water repellent* oil and grease repellent* OBTEGO R-30 no light Basic Basic OBTEGO R-40 yes colored; translucent to opaque Plus Plus OBTEGO R-50 yes light Plus Plus OBTEGO R-400 no intensive Premium Premium 41
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