What a Mess!

Accidents happen! Good that we’re well prepared. At WACKER, we have developed a number of solutions to make daily life easier. Even - or especially - when things get crazy.

Beautiful Things Should Be Treated Well

Be they terracotta, travertine or concrete, open-pored mineral floors are especially beautiful, but also extremely susceptible to dirt pickup. They easily soak up liquids through their pores via the capillary effect, and the stains are difficult to remove later. That is why the surface is generally treated to repel water and dirt.

Untreated stone floor surface
Treated stone floor surface

In the untreated floor, the pores literally suck up dirt. After surface treatment, liquids should form beads, which can be easily wiped off.

Triple Protection

Various options are therefore available for treating porous mineral surfaces. The European standard EN 1504-2, with the example of concrete, distinguishes between three types of surface treatment.

Hydrophobic impregnation

Definition as per EN 1504-2 Treatment of concrete to produce a water-repellent surface. The pores and capillaries are internally coated, but they are not filled. There is no film on the surface of the concrete. And there is little or no change in its appearance. Active compounds may be, for example, silanes or siloxanes.

Surface impregnation

Definition as per EN 1504-2 Treatment of the concrete to reduce the surface porosity and to strengthen the surface. The pores and capillaries are partially or totally filled. This treatment usually leads to a discontinuous, thin film on the surface. Binders may be, for example, organic polymers.

Surface Coating

Definition as per EN 1504-2 Treatment to produce a continuous protective layer on the surface of concrete. The thickness is typically of 0.1 mm to 5 mm. Silanes, for example, may often be used here. Particular applications may require a thickness greater than 5 mm. Binders may be, for example, organic polymers, organic polymers with cement as a filler, or hydraulic cement modified with polymer dispersion.

Keeping Stains at Bay

In normal usage, these distinctions can become blurred. “Impregnation” usually means hydrophobic impregnation. If the pores are mainly filled, the term “sealing” is often used. There is also no simple answer to the question of which surface treatment is best. It depends, for example, on the material, the expected loading and the desired aesthetic effect. The floor of a factory hall requires different treatment from the lobby of a hotel or a family living room. WACKER has therefore developed different solutions. The latest include PRIMIS®SAF 9000 and SILRES® BS 6920. PRIMIS® SAF 9000 is a new water-based polymer dispersion with very high molecular weight and very small particle size. SILRES® BS 6920 is a one-component solvent-free, silane-crosslinking binder.

Different Modes of Operation of PRIMIS® SAF 9000 and SILRES® BS 6920

Polymer particles are absorbed into the substrate

Effect: Consolidation of the surface and dirt repellency with no change in appearance

Absorption and crosslinking of silane-curing polymers

Effect: improved dirt repellency and abrasion resistance together with color intensification

Our Product Recommendations

Recommendation for hydrophobic impregnation: SILRES® BS Creme C and SILRES® BS 1701

Recommendation for impregnation: PRIMIS® SAF 9000 and PRIMIS® SAF 9001

Recommendation for coating: SILRES® BS 6920

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