How We Repair Expansion Joints
Proper joint repair isn't just caulk over a crack. Every job follows the same proven process — clean, prep, backer rod, seal — so the repair actually lasts.
How We Repair Expansion Joints
Proper joint repair isn't just caulk over a crack. Every job follows the same proven process — clean, prep, backer rod, seal — so the repair actually lasts.
Site Assessment
We walk the property and assess every joint — measuring width and depth, identifying failed sealant, checking for backer rod, and noting any underlying issues like slab movement or settlement.
Remove Failed Material
All deteriorated sealant, backer rod, and debris is removed from the joint. We use oscillating tools, grinders, and compressed air to get the joint faces clean and ready for new material.
Clean and Dry
Joint faces are cleaned with a wire brush and blown out with compressed air. We verify the joint is fully dry before proceeding — moisture beneath sealant is a leading cause of premature failure.
Install Backer Rod
Where joint depth requires it, we install closed-cell polyethylene backer rod to control sealant depth and create the proper two-point adhesion profile. The right backer rod diameter ensures the sealant can flex without tearing.
Apply Primer (When Required)
Some sealant systems and substrate conditions require a primer coat to ensure proper adhesion. We follow manufacturer specifications for each product and application type.
Apply Sealant
We apply professional-grade polyurethane or silicone sealant — selected for the specific application, movement requirements, and exposure conditions. Sealant is tooled to ensure full contact with joint faces and a clean finished profile.
Cure and Inspect
We allow proper cure time and do a final walkthrough to verify every joint is properly filled, tooled, and adhered. We don't leave until the work is right.
Materials We Use
We use professional-grade products — not hardware store caulk.
Polyurethane Sealants
High-movement polyurethane sealants for concrete joints subject to significant thermal and structural movement. Excellent adhesion to concrete, paintable, and durable in Texas heat.
Silicone Sealants
Pool-rated silicone sealants for coping joints and wet environments. Resistant to pool chemicals, UV, and continuous wet/dry cycling.
Backer Rod
Closed-cell polyethylene backer rod in multiple diameters to match joint width. Controls sealant depth and creates the proper two-point adhesion profile.
Sand Broadcast for a Color-Matched Finish
After the sealant is applied, we can broadcast fine sand directly into the wet material. This blends the repaired joint with the surrounding concrete — so the fix looks intentional, not patched.
It's especially effective on exposed aggregate, decorative concrete, and pool decking where a plain black or gray sealant line would stand out.
Ask us about color matching — we'll assess your surface and recommend the right sand grade and sealant color for a seamless result.
Ready to Get It Done Right?
Send us photos of your joints and we'll give you a free, honest estimate.