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How to Repair Cracks in the Substrate?
Updated: 15.07.2026
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Cracks must be stabilised; microcement alone will not fix an active crack.
Detailed answer
It is important to first understand the crack. An active crack that continues to move cannot be resolved with microcement alone. Stable cracks are usually stitched using epoxy filler, steel staples, and filled with silica sand. Only after this can you proceed with further layering. We recommend stitching cracks with epoxy filler, steel staples, and filling with silica sand.
Common mistakes
- repairing only the surface without addressing the cause
- using unsuitable materials for cracks
- neglecting subsequent surface protection
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