The renovation of old industrial floor coverings is always a special challenge. After decades of daily or intensive use, surfaces are massively worn and often even contaminated. In many cases, substrates in contact with the soil lack suitable sealing against rising damp.

These problems quickly become the downfall of the new coating. Therefore, it is important to minimise or, at best, exclude unforeseeable risks prior to floor renovation.

Usually, a refurbishment of such contaminated and severely damaged surfaces can only be solved by massive substance removal, e.g. by milling. The resulting roughened floor must be repaired, supplemented, levelled and finally smoothed with a levelling layer.

Alternatively, it is possible to renovate the surface with self-levelling epoxy resin fillers or mortars and thus, to create a durable floor covering. However, with high layer thicknesses and consumption quantities, this option is very costly or requires elaborate and time-consuming processing. Self-levelling mineral masses can circumvent this problem while being an excellent complement to reactive resins.

Complex application with conventional mineral levelling compounds.

Mineral levelling compounds for industrial floor construction must be of high quality and suitable to absorb the subsequent coating. It is not uncommon for levelling compounds and reactive resin coatings to be installed from different manufacturers.

Most mineral levelling compounds cannot be coated directly with reactive resins. Although the surfaces appear smooth and hard, they are unsuitable for the absorption of reaction resins. In self-levelling compounds, fines, polymers and additives can accumulate on the surface, leading to reduced adhesion and subsequent damage to the coating when moisture penetrates from below. When installing such products, one runs a considerable risk of subsequent delamination of the coating.

Even more suitable levelling compounds must first be prepared to absorb subsequent coatings by adequate substrate preparation, e.g. by shot-blasting. A significantly more economical solution is offered by the newly developed, matching KLB levelling compounds, which have been specifically designed to be covered with reactive resin coatings.

Efficient solution from one provider: reduced installation times thanks to coatable KLB levelling compounds.

By carefully matching mineral levelling compounds to subsequent reactive resin coatings, an economical renovation concept for robust industrial floors can be achieved. The resilient levelling compounds from KLB Kötztal offer a solution from a single source with qualified coordination of the products used:

Properly combined: fast recoating after only 16 to 24 hours.

Depending on the levelling compound, KLB-SYSTEM EPOXID EP 724 E Haftgrund Super (for EC 610 C) or the low-emission dispersion base coat EC 940 Grund (for EC 633 C) can be used as primer on the mechanically prepared substrate. Alternatively, epoxy resin primers such as KLB-SYSTEM EPOXID EP 53 AgBB-Spezialgrund can be used when the surface is being sanded openly with quartz sand (grain size 0.7/1.2 mm).

The fast hardening ensures that a primer for the subsequent reactive resin coating can be applied after only 16 to 24 hours. KLB-SYSTEM EPOXID EP 724 E Haftgrund Super is suitable as system primer at a consumption of 0.2 – 0.3 kg/m². After a short curing time of approx. 12 – 16 hours, a recommended epoxy or polyurethane resin coating can be applied.

The products are matched to each other down to the last detail and can be combined optimally and in a time-saving manner without the need for an additional intermediate layer. The advantages of such a system solution are therefore obvious : the build-up is low-emission and can be installed in a wide variety of sectors.