Professional Crack Repair

Types of Cracks

Structural Cracks

Result from design flaws, overloading, or foundation settlement. Width > 3mm. Require immediate attention as they compromise structural integrity.

Non-Structural (Shrinkage) Cracks

Occur due to concrete curing, temperature changes, or material shrinkage. Width < 3mm. Primarily aesthetic but can allow water ingress.

Active vs Dormant Cracks

Active: Still widening due to ongoing structural movement or water leakage. Require flexible sealants.

Dormant: Stable cracks that have stopped moving. Can be repaired with rigid epoxy injection.

Our Crack Repair Methods

Epoxy Injection

For: Dry, dormant structural cracks

Process: Low-viscosity epoxy resin injected under pressure to fill entire crack depth. Cures to form high-strength bond, restoring original structural capacity.

Benefits: Structural restoration, prevents crack propagation, long-term durability

Polyurethane (PU) Injection

For: Active leaking cracks, damp substrates

Process: Hydrophilic PU resin injected into crack. Reacts with water to expand 20-30 times, filling voids and stopping water flow immediately.

Benefits: Stops active leaks, works in wet conditions, flexible to accommodate minor movement

Flexible Sealant Application

For: Surface cracks, expansion joints

Process: Crack routing, cleaning, and application of polyurethane or polysulfide sealants that can accommodate movement.

Crack Repair Process

1. Inspection: Determine crack type, cause, and activity
2. Crack Routing: Widen crack to create clean injection path
3. Packer Installation: Install injection ports at intervals
4. Surface Sealing: Seal crack surface except at injection points
5. Injection: Inject resin under controlled pressure starting from bottom
6. Curing: Allow proper curing time (24-48 hours)
7. Finishing: Remove packers, apply surface sealant

Materials Used

• Low-viscosity epoxy resins (for structural repair)
• Hydrophilic polyurethane grouts (for active leaks)
• Injection packers and pressure equipment
• Polyurethane/polysulfide sealants
• Carbon fiber reinforcement (for severe cases)

Application Areas

• Structural beams and columns
• Concrete slabs and walls
• Basement and retaining walls
• Bridge decks and infrastructure
• Water tanks and lift pits