How an injection hose works
The hose is fixed along a construction joint before concrete is poured, with its ends brought out to accessible packers. Once the concrete has cured, grout is pumped into the hose and escapes through its porous walls into any voids, honeycombing or micro-cracks along the joint, sealing the leakage path from inside the structure. Because the hose can be flushed clean before the grout sets, the same line can be injected again in future, which makes it a maintainable joint seal rather than a one-time repair.
Where it is used
Typical applications include basements, underground car parks, metro stations and tunnels, water and sewage treatment tanks, reservoirs and any concrete structure where a watertight construction joint must stay serviceable over its design life. It is often used together with a PVC water stop seal or hydrophilic swell bar as a secondary line of defence.
