Porcelain stoneware is now the most common building material in the tile and slab area. Although these are microporous tiles that hardly absorb water, there are porcelain stoneware that can be sealed. However, prior impregnation may be important, depending on the manufacturing technique.
Before sealing, you need to determine how your porcelain stoneware was delivered from the factory
Porcelain stoneware is the further development of stoneware tiles and slabs. The new type of ceramics emerged in the 1980s. Since then, some machining methods have become established that are already carried out at the factory. You can differentiate between glazed, unglazed and polished porcelain stoneware tiles and slabs.
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Clean porcelain stoneware after the manufacturing process
Sealing of glazed porcelain stoneware
Glazed porcelain stoneware does not require any further treatment such as sealing. However, in order to make maintenance a little easier, glazed porcelain stoneware tiles are also repeatedly sealed. Please note, however, that the sealing creates a protective layer on the porcelain stoneware, which can further negatively affect the slip resistance, which is already limited with glazed tiles.
Sealing of unglazed porcelain stoneware
In the case of non-glazed porcelain stoneware, on the other hand, the slip resistance is adjusted via the surface properties. This means the rougher the tile or plate, the greater the slip resistance. At the same time, dirt also collects significantly better on the relatively rough surface. In order to prevent excessive pollution, a seal is recommended. For this purpose, clean the non-glazed porcelain stoneware first with the most acidic or alkaline cleaner. Under no circumstances should you use cleaning agents with surfactants. Then apply the seal shared specifically for porcelain stoneware.
The sealing of polished porcelain stoneware
With polished porcelain stoneware, however, you have to make more prepares. Polished does not mean other than the burned surface is ground. Thus, the micropores are disclosed. Although not excessive dirt can penetrate into the porcelain stoneware. Nevertheless, it is deep and intense enough to become a clearly visible pollution over time. If you were to apply a sealant directly to the microporous, polished porcelain stoneware tiles, the sealant could penetrate the porcelain stoneware. But a seal should be placed around a tile like a protective layer. So you need to protect polished porcelain stoneware with an impregnation before sealing it.
Polished porcelain stoneware: clean, impregnate and then seal
You clean the porcelain stoneware tiles with a suitable cleaner and then apply the impregnation according to the manufacturer's instructions. Once the impregnation has been absorbed and hardened, you can seal the porcelain stoneware. If you did not impregnate the porcelain stoneware beforehand, the seal in the porcelain stoneware could create a layer-forming effect that absorbs and holds on to dirt particles. So firm, in fact, that the porcelain stoneware can hardly be cleaned.Tips & Tricks If possible, do not use detergents with tensides on porcelain stoneware. Surfactants have the property of forming layers and binding dirt.
Remember that sealants always form a protective layer around the tile and thus significantly reduce the slip resistance. Sealing is therefore only conditionally recommended, especially on porcelain stoneware surfaces that are heavily trafficked.
Of course, you will also find articles (advice and instructions) on [impregnating porcelain stoneware tiles] and slabs in the house journal.