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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.
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.
These applications of polyurethane foam, due to their versatility, are indicated for both new and existing buildings that do not have any insulation system. Thus, polyurethane injection is widely used in the thermal insulation of facades and walls, also waterproofing and solving cracks.
How to inject polyurethane correctly. The application of injected polyurethane is mainly used in the filling of air gaps in façades or partition walls, mainly in cases of renovation works, in order to obtain optimal thermoacoustic insulation.
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).
8 lis 2023 · The method is also employed for wall and floor repairs, where its quick-setting property allows for minimal disruption and fast return to service. Polyurethane's strong bonding capability ensures a durable repair, making it a reliable choice for maintaining construction stability.
Polyurethane foam crack injection involves injecting a reactive foam into cracks, voids, or joints in concrete structures. The polyurethane resin expands upon contact with water, forming a flexible, closed-cell foam that seals leaks and prevents water from entering the structure.
