Method · Repair & strengthening
Polyurethane is injected into the leaking crack, foams on contact with water and fills the water path. Under water pressure, flexible PU resin follows the foam for a lasting seal.
Polyurethane injected into a leaking crack. It foams on contact with water and fills the water path.
Cracks that leak water in basements, pits, tanks and treatment plants.
Under water pressure, foam stops the flow first and flexible PU resin follows for the lasting seal. A leak at a joint that moves a little takes hydrogel, a soft, flexible gel.
Pressed into the running leak; it sets in minutes even with water flowing.
Injected into the crack; it foams on contact with water and fills the water path.
Flexible PU resin injected after the foam for a lasting seal.
Under water pressure the usual set is 1 → 2 → 3; not every leak needs every step. An emergency stop only is step 1.
This is one example. We decide the actual work after seeing the site.
We find the cause — corrosion, movement, leakage or overload — and pick the method for it.
Dry or damp cracks take epoxy resin to restore strength; wet cracks are sealed with flexible PU resin, which does not restore strength; leaks take PU foam or hydrogel.
We find the cause first, then pick the method for it — not just "cover it up".
| Method | What it does | Symptom |
|---|---|---|
| Patching — Surface Repair | Hand-fill chipped/spalled areas. No formwork; about 30–50 mm per layer by product (less overhead). Polymer-modified repair mortar. | Chipped / spalled surface |
| Grouting — Filling Voids | Pour or pump into large voids in columns, beams, machine bases (formwork / pressure). Non-shrink grout (no shrink when cured as directed, tight bond) ・ Epoxy grout (high strength, resists chemicals and vibration). | Large void in a column, beam or machine base |
| Crack Injection — Epoxy or PU resin | Epoxy resin restores strength in dry cracks ・ wetter cracks take flexible PU resin, which seals but does not restore strength. | Structural crack — restore strength |
| Crack Injection — Stop leaks: PU Foamthis page | Foams on contact with water and stops it fast. | Crack that leaks water |
| Crack Injection — Stop leaks: Hydrogel | Swells into a soft, flexible gel — for leaks at joints that move a little. | Leak at a moving joint |
| CFRP Strengthening | Not repair — the goal is to increase the load a structure can carry (e.g. raise a floor's load capacity). 3 forms: Fabric/Wrap ・ Plate/Laminate ・ Rod/Bar. Requires structural-engineer design (ACI 440.2); damaged concrete is repaired first. | Need to carry more load |
Also with this method:MWA Lat Phrao Pumping Station · Min Buri Wastewater Treatment Plant · PTT GSP7 · Asia Can Manufacturing
The length of the leaking cracks, how many there are, access, and whether a permanent seal (resin after the foam) is needed. Send photos of the leak on LINE.
Under water pressure the usual set is: plug the running leak, inject PU foam, then follow with flexible PU resin. Not every leak needs every step, and an emergency stop is the first step only.
PU foam foams on contact with water and stops it fast — for leaking cracks. Hydrogel swells into a soft, flexible gel and suits a leak at a joint that moves a little.
Send photos of the crack or damage and where it is. We diagnose the cause and propose the method.
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