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Polyurethane foam is an injectable polyol and isocyanate resin sealant, insulation, grout which expands upon application providing void fill, structural support, and re-leveling properties.
Injection is a common method used to repair and waterproof concrete structures. It is also used to consolidate and stabilize ground before future structures are erected (pre-excavation grouting) and to stop water and consolidate ground in existing underground structures (post-injection).
The most common application is the injection of polyurethane in the air gap of façades: with only a few holes, polyurethane foam is injected into the air gap and it expands reaching every corner, so that the wall is perfectly insulated and repaired.
6 cze 2022 · PU Injection Grouting System for waterproofing | Polyurethane or Epoxy water leakage repair In this video, I have explained the waterproofing technique which is helpful in arresting cracks...
8 lis 2023 · In concrete and structural repairs, polyurethane injection stands out for its adaptability and effectiveness. The process involves injecting a polyurethane mix into voids or cracks, where it expands and cures rapidly, ensuring quick restoration of structural integrity.
10 lip 2023 · Polyurethane injection (PU injection) is another popular method for crack repair. It involves injecting a polyurethane foam into the cracks which expands upon contact with water or moisture. The expanding foam fills up the voids within the crack and creates a waterproof barrier.
1 gru 2019 · The use of polyurethane injection typically involves the high-pressure injection of activated polyurethane resin through injection packers that are hammered into holes drilled in the hardened concrete wall.
