Which adhesive should be chosen?
If the chosen agglomerate material is dimensionally stable (e.g. deformation less than 0.3mm), the choice of adhesive will depend on non-moisture sensitivity factors such as the dimensions of the agglomerate, the intended use, or the needs of the construction site.
Agglomerate that deforms by 0.3mm – 0.6mm movement mark, can use a rapid-setting adhesive such as Granirapid, Elastorapid. The concept is that the water within the rapid-setting adhesive is quickly consumed by the setting reaction and hence made unavailable for absorption by the stone.
Some agglomerates that are dimensionally unstable that the movement cannot be kept below 0.6mm even with a rapid-setting adhesive. In these cases, resin based adhesives that do not contain any water at all such as Keralastic T or Kerapoxy must be used.
Ensure to check the agglomerate manufacturer or importer’s literature for information on moisture sensitivity of your stone.
Mapei Singapore is equipped to carry out this test as a value-added service for our clients.
Knowing the questions to ask and having product you can trust means ‘Everything’s OK with MAPEI.’