Self-leveling concrete has several notable disadvantages, starting with its relatively high material cost compared to traditional floor patching mortars or plywood shimming. The installation process is extremely time-sensitive and demands rapid, uninterrupted teamwork because self-leveler begins setting within twenty to thirty minutes of mixing, leaving no margin for error or slow pacing. Additionally, it requires meticulous, labor-intensive preparation including thorough cleaning, patching cracks, and applying specialized primers to prevent disastrous failures. Finally, it adds significant dead weight to a structure, which can be problematic on upper wooden floors if poured excessively thick.
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