Epoxy vs polyurethane — matching chemistry to crack behaviour
Epoxy resins can achieve high bond strength in dry, stable cracks and are often selected where structural contribution is specified. Polyurethane systems can tolerate cyclic movement and wet substrates better in certain leak-sealing contexts. Misapplication is expensive: the wrong resin fails, then owners pay twice for breakout.
Injection methodology we document on site
Ports are spaced to manufacturer guidance, surfaces are sealed to contain resin travel, and pressures are controlled to avoid splitting the substrate. Maverick photographs port layouts, batch numbers, and environmental readings so commercial clients can file QA evidence.
Where crack injection fits the wider remedial plan
Injection rarely replaces drainage remediation, joint rebuilds, or waterproofing membrane renewal. We map whether the crack is symptomatic of settlement, thermal movement, or hydrostatic load so the portfolio does not fund a repeat failure.
Commercial and sectional-title realities
Trustees and engineers often need assurance that injection will not mask a wider structural issue. Maverick’s language stays compliance-safe: we implement engineer-specified injection details and flag when intrusive investigation or monitoring is advisable.
Typical project profiles (anonymised)
Parking deck shear cracks with chloride exposure
Injection was paired with localised waterproofing upgrades at drainage dishes to stop chlorides re-entering after the structural repair closed.
Balcony soffit active leaks
Polyurethane injection stemmed active flow long enough to allow phased waterproofing renewal above without flooding tenants below.
Plant room slab dormant cracks
Epoxy injection restored stiffness ahead of a heavy equipment re-rig after engineer review of crack stability monitoring data.
Related technical services
Frequently asked questions
What is the technical difference between epoxy and polyurethane crack injection?▼
Broadly, epoxy is selected for structural bonding in appropriately prepared dry cracks; polyurethane chemistries are often used where water is actively moving and flexible sealing is required. Final selection must follow engineer/manufacturer guidance.
Will injection make my cracks disappear cosmetically?▼
Injection fills the internal fracture network; surface finishing may still require levelling or coating programmes depending on exposure and aesthetics.
How do you know injection is suitable?▼
Through crack mapping, movement history, moisture profiling, and sometimes monitoring. If cracks are opening progressively, injection alone may be inappropriate without structural intervention.
Can you inject from one side only?▼
Sometimes, depending on thickness and leak path. Through-injection setups exist but are not always feasible — assessments define port geometry.
Do you provide warranties on injection?▼
Warranties follow manufacturer systems and defined maintenance. We document scope boundaries so latent defects outside the injection path are not misrepresented as covered.
How long does site work take?▼
Small crack networks may finish in days; large parking grids require phasing. We provide programme narratives for BC meetings.
Is injection noisy for residents?▼
Drilling ports and pump cycles generate short bursts of noise. Maverick schedules shifts and communicates decibel windows.
Can injection be combined with carbon fibre strengthening?▼
Yes when engineers specify hybrid systems. Maverick sequences trades to avoid coating compatibility conflicts.
What stops resin leaking into neighbour units?▼
Containment planning, pressure limits, and mock-up bays where required. High-risk interfaces get extra sealing detail.
Do you test after injection?▼
Testing regimes depend on specification — holiday detection for membranes, pull-off tests for coatings, or moisture verification for leak paths.