Surface types
Concrete, cement screed, sound tile cladding, cement plaster.
Treatment of surface to be internally waterproofed
Remove any loose material and anti-adhesion coats, paint coats, cement stains and grease from the structural slab before work is started. Smooth surfaces, after boarding removal and contaminated with boarding protection agents may require additional treatment: gritblasting or sandblasting or milling. Avoid sanding the surfaces, as the sand dust is extremely hard to remove and its particles would impair adhesion of the waterproofing layer. Irregularities, holes after boarding or air bubbles must be patched with system levelling mortars intended for concrete re-profiling. Properly treated surface of the pool should be sound, even, dry, clean, free from dust and contamination. At least 3 hours prior to the application of the tiling insulation, treat the surface with ALPOL AG 707 silicate-polymer primer.
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