Concrete Crack Injections in Kansas City 

Concrete Crack Injections in Kansas City to Seal Leaks & Strengthen Foundations

Water leaking through your basement walls or foundation cracks is more than just a nuisance—it can signal serious structural issues and lead to mold, mildew, and long-term foundation damage. At PolyMagic, we specialize in concrete crack injection services that seal cracks from the inside out—fast, clean, and effective.

Understanding Your Foundation Crack Repair Options

Concrete cracks can vary greatly—some are structural, others are caused by water pressure or soil movement. At PolyMagic, we don't believe in a one-size-fits-all fix. Our team carefully evaluates the location, size, orientation, and activity of each crack to recommend the most effective repair solution.

Factors we consider include:

• Crack width, depth, and direction
• Evidence of foundation movement
• Presence of moisture or active leaks
• Soil pressure and environmental conditions

Based on this evaluation, we use one of two professional injection methods:

• Epoxy Injection for structural crack repair
• Polyurethane Resin Injection for sealing active leaks and non-structural cracks

Epoxy Concrete Injection for Structural Concrete Crack Repair

Epoxy injection is the go-to solution when a concrete crack needs more than just sealing—it needs structural reinforcement. This method uses a rigid, high-strength epoxy resin to permanently bond both sides of a crack, essentially restoring the original integrity of the concrete.

Best used for:

• Structural foundation cracks
• Vertical or diagonal cracks
• Dry or previously dried cracks
• Load-bearing walls or slabs

How it works:
The area around the crack is thoroughly cleaned and prepped. Injection ports are installed along the length of the crack, and then the epoxy resin is pressure-injected into the crack cavity. Once cured, the epoxy forms a solid, immovable bond that strengthens the concrete and prevents future movement.

Benefits of Epoxy Crack Injection:

• Restores structural strength
• Minimally invasive—no need to tear out concrete
• Long-lasting solution for dry cracks
• Helps prevent future cracking in the same area

If your foundation or wall needs concrete crack repair that reinforces its strength, epoxy injection is the most effective and permanent method available.

Polyurethane Resin Concrete Injection for Active Leak Sealing

Polyurethane injection is a flexible, water-reactive solution designed to seal cracks that are actively leaking or exposed to moisture. Unlike rigid epoxies, polyurethane foam expands after injection, filling voids and moving with the natural expansion and contraction of your foundation.

Best used for:

• Actively leaking cracks
• Wet or damp foundations
• Horizontal, vertical, or hairline cracks
• Basement walls and below-grade applications

How it works:
Our technicians clean the crack and install injection ports. The polyurethane resin is injected under controlled pressure, where it reacts with moisture and rapidly expands—filling the crack and creating a water-tight seal. It begins working within minutes, even in saturated conditions.

Benefits of Polyurethane Crack Injection:

• Stops water intrusion almost immediately
• Remains flexible to accommodate shifting soils
• Excellent for preventing mold, humidity, and vapor intrusion
• Interior repair—no need for exterior excavation
• Can be performed year-round, even in wet conditions

If you're noticing water leaks, damp walls, or increased humidity, polyurethane crack injection is a fast, proven way to seal cracks and stop moisture at the source.