Wherever concrete has to be
sealed, polyurethanes are the first choice. The spectrum for PU-grout
applications is extremely wide. It includes residential work such as leaky basement
repair, sealing of pools and concrete balconies and countless applications in
commercial areas such as tunnels, bridges and parking garages. Cracks in below
grade walls are injected, and liquid membranes behind walls are created with polyurethanes
by curtain injection. Drinking and wastewater tanks are being sealed as well as
leaky manholes and pipes.
The injection can be done from the
negative-side without digging and without access to the waterside. Polyurethanes
work in the crack and behind the structure where they create a reliable barrier
to prevent further water intrusion. In combination with packers, inject pipes
and inject-tubes, grouts offer a dimension of applications unmatched by any
other injection material.
I wish people would write more about this as you have done. This is something that is very important and has been largely overlooked by the internet community
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