Suggestions and Solutions from Hadjiyiannis and Isomat!
Surfaces:
Pool masonry with polyurethane insulation
Issue:
Detachment of mosaic
Possible causes
The possible causes of this particular problem can be attributed to the following:
- Lack of adhesion of the tile adhesive to the polyurethane-based sealant of the substrate, due to insufficient adhesion of quartz sand to the fresh sealant.
- Insufficient waterproofing of the pool.
- Wrong choice of tile adhesive.
Solution
- First, the detached tiles should be removed. Piping and lighting must be checked for leaks.
- This is followed by cleaning the surface of dust and loose materials.
- The polyurethane primer PRIMER PU-100 is applied, followed by the polyurethane spreadable sealant ISOFLEX PU-510 in two layers. After the application of the second layer and while it is fresh, it is covered with quartz sand (Consumption of quartz sand about 3kg/m2).
- After ISOFLEX PU-510 has hardened, it is recommended to stick the new tiles with high-quality resin adhesives, such as ISOMAT AK-25 and ISOMAT AK-22.
- The surface is then grouted after at least 48 hours. At low temperatures the times are extended.
