CAWS repairs cracked and leaking concrete across Perth, in slabs, walls, basements, car parks and balconies. We pressure inject cracks through their full depth with epoxy or polyurethane resin, so they’re sealed all the way through, not just covered on top.
Rust stains or cracks along a slab edge are often a sign of concrete cancer, which needs a different repair.
Most concrete cracks run much deeper than they look. A filler or sealant on the surface covers the top, but the crack stays open underneath, so water keeps tracking through and any movement reopens the patch.
A filled crack looks fixed from above. What matters is what happens underneath.
Surface patching covers the top of the crack. The crack stays open underneath, so movement reopens the patch and water keeps tracking through.
Pressure injection pumps resin through ports drilled into the crack, filling it through its full depth. Epoxy resin bonds dry, non-moving cracks back together. For leaking cracks, water-reactive polyurethane stops the flow, usually followed by a flexible resin for a permanent seal.
Epoxy resin bonds dry, non-moving cracks back together, restoring the concrete’s continuity.
Water reactive polyurethane is used where a crack is leaking. It reacts with the water to stop the flow, and is usually followed by a flexible resin for a permanent seal.
Cracks that keep moving, or that point to a structural problem, may need a movement joint or an engineer’s input instead. We’ll tell you which applies after we’ve looked at it.
No. Injection suits most leaking and non-moving cracks. Cracks that keep moving may need a movement joint, and cracks from a structural problem need an engineer’s assessment first.
Usually, yes. Water reactive polyurethane is made for active leaks and reacts with the water to stop the flow.
Yes. Injection is often combined with waterproofing from the inside. See basement waterproofing.
Yes. We repair cracks in driveways, slabs and walls at home, as well as in strata, commercial and industrial buildings.
