How to Seal Concrete Expansion Joints?

Use quikrete non-sag polyurethane sealant, and move the nozzle slowly along the length of the joint, pressing the sealant into the joint. Use the tip of the nozzle to smooth the sealant, if needed. Immediately clean up any excess sealant with a commercial solvent or a citrus-based cleaner.

How to Seal Concrete Expansion Joints?

Concrete expansion joints are a crucial part of any concrete construction project. They are installed to accommodate the natural expansion and contraction of concrete due to changes in temperature and moisture. Without them, the concrete can crack, creating costly and unsightly damage. Sealing concrete expansion joints is an important part of keeping your concrete structure safe and sound. Here’s how to do it:

1. Clean the Expansion Joints

Before you can seal the expansion joints, you’ll need to make sure they are clean. Use a wire brush to get rid of any dirt, debris, or other contaminants that may be present in the joint. Also, be sure to remove any existing sealant from the joint.

2. Apply the Primer

Once the joint is clean, you can start the sealing process by applying a primer. This will help the sealant adhere to the concrete more effectively. A masonry primer is usually the best choice for this job.

3. Add a Backer Rod

Once you’ve applied the primer, it’s time to add a backer rod. This is a foam material that is inserted into the joint before the sealant is applied. It helps to fill the gap and