To prime – but how? The correct substrate preparation plays a decisive role in the success of work carried out

“… the substrate is is to be treated with a suitable primer where necessary ...“ – everybody knows this sentence from application instructions and technical data sheets. In most cases the choice of primer falls under the responsibility of the installer, due to the diversity of the substrate, especially in the existing building sector, and this cannot be changed. The absorption of the substrate, in particular, determines the choice of a suitable primer and the quality of following work.

For example when an adhesive loses it‘s water too quickly into the substrate, there is an increased risk that the bond of the adhesive to the substrate will be poor and the resultant strength of the adhesive will not cope with the requirements. A complaint is pre-programmed. On the contrary there are substrates, for example old tiled finishes, into which no moisture can penetrate and that are so smooth that the bond between adhesive bed and substrate surface can only be ensured with difficulty.

SCHOMBURG offers solutions to both problems with a range of primers, available in small or large containers tailored to suit the requirements of each building site.

The new special primer ASO-Unigrund-S can be used as a universal solution for almost all problems. The lightly filled dipsersion-based primer improves the bond on non-absorbent substrates and can also – slighly diluted – be used on absorbent substrates. The very low consumption contributes to a very economical application. If absorbent substrates are to be treated, there is the ready-to-use primer ASO-Unigrund-GE or the concentrate ASO-Unigrund-K, which can be applied manually or by spray techniques.

Under particulatly demanding conditions, for example damp surfaces or where there is vapour pressure originating from the substrate, the reaction resin based primer INDUFLOOR-IB1250 is available for use. This virtually unique system achieves secure bonds to successive finishes even onto very problematic substrates and in many cases considerably shortens construction times, often to the tune of a few weeks. In addition to ceramic tiles and natural stone finishes, parquet, PVC flooring, linoleum and carpet can be installed onto the substrate prepared in this way, without worrying about the difficulties of residual moisture in the substrate.