The determining factors for obtaining an excellent resin surface are few, but must be carefully observed, in order not to fall into irreparable errors.
Clearly, for each type of surface it is necessary to use a precise resin, able to adapt to the environment in which it is applied , as well as to the function it must cover . Most of all, however, the aspect that must be taken into consideration is represented by the good health of the fund .
It is now clear that to proceed with the application of the resin it is necessary to ensure that the substrate is adequately prepared, in order to avoid irregularities and fissures which would jeopardize the uniformity and the plan of the smooth and regular surface. To ensure that the media is properly prepared, the following aspects need to be assessed:
- the degree of humidity.
In fact, if the support was new , or just made, it will be necessary to wait for the necessary time, so that it is completely dry and stabilized. The humidity factor must not be underestimated, because if a layer of waterproof resin is placed on a non-dry substrate, the result will be the formation of a moisture barrier which, over time, will cause the moisture to rise again, generated from steam to high pressure which could cause irreparable damage to the smooth and shiny surface. Basically, if you decide to apply a non-vapor permeable resin, the residual moisture must be less than 4%if, on the other hand, a vapor permeable resin is used, it is possible to ascertain higher values, between 6-7%.
If the substrate has already been treated with resin (resin driveways), it is still necessary to evaluate its state, that is, whether it is old, new, or worn, or in perfect health. If the resin support (although it is old) is perfectly intact, it will be sufficient to sand, vacuum the dust, clean the surface and then proceed with the application of the new resin layer. If, however, the support was completely or partially worn, or there were imperfections due to poor application, in these cases it is convenient to proceed with the removal of the resin surface by different treatments, or the following:
the shot peening which is an operation used to remove superficial imperfections of the support;
the sanding that allows to remove old resin films and to make the surface more porous and promote the application of the product; it is carried out by means of abrasive discs with gradually smaller grain inserted in normal single brush machines.
The application of a smoothing or self-leveling product allows to remedy any deformities that are still present.
There are different ways to apply the resin, depending on the level of difficulty chosen (beginner or expert) and the type of resin used.
By simplifying, the laying of the resin on a surface can be done in two ways: either by do-it-yourself , or by more sophisticated technical procedures . For the first method of application it is sufficient to use a brush or a roller to lay a thin layer of resinous material which can have a thickness ranging from 80 to 250 microns; for the second method of application, instead, in addition to possessing the necessary, sophisticated and specific tools, it is also necessary to rely on highly specialized personnel: in this case, in fact, the resinous layer has a wider thickness (from 2 to 10 cm) and the work, clearly, tends to be more scrupulous. For both methods of application it is necessary to wait a period of time in order to allow the resin to reach a complete drying: about 48 hours for thin laying, from five to six days for the thicker resin layer.
Usually, to apply the resin on a surface (regardless of the type, for example, vertical or horizontal) it is necessary to proceed with three specific steps that allow to stratify the mixture , in order to make the floor more resistant and durable.
We start with the drafting of a type of resin called epoxy , which is characterized by an excellent resistance to pressure, but, in general, is less brilliant than the resin applied in the next layer. This resin is usually found on the market under the name of primer and its function is to create a uniform surface, free of deformities and imperfections, such as, for example, the alternation of opaque areas and shiny areas. Furthermore, the primer makes the support more porous and allows the resin to adhere better. The primer is usually fluid, able to penetrate deeper and can be based on water or solvent based.