... After polymerizated bulge, good extensibility, flexibility, impermeab Injection Polyurethane curing agent APPLICATION:Applicable for plugging of the leakage of tunnels, subways ... good extensibility, flexibility, impermeability andlow temperature resistance;3.After curing, meeting water can continue to expand and further play a ... 6 months;3.packaging : 10kg / barrel. Injection Polyurethane curing agent