Learn how to repair concrete after harsh winters.
If you left concrete surfaces around your house unprotected this winter, it’s very likely that you have a crack or two to deal with this spring. The repeated freezing and thawing that occurs due to changes in daytime and nighttime temperatures during the winter can cause concrete to crack and flake. When rain, snow or ice migrates through cracks in concrete and saturates the substrate, the concrete will shift and move every time freezing and thawing occurs. This repeated movement can cause the cracks to expand or create new ones. Fortunately, there is simple and inexpensive way to repair these unwanted cracks before entertaining family, friends or other guests at your home.
QUIKRETE® Polyurethane Concrete Crack Sealant is a textured one-component, fast-curing, flexible material that provides a durable elastic bond, so no matter how the concrete surface shifts in the future the repair will stay intact. In addition to improving the appearance of a concrete surface, using a polyurethane concrete crack sealant prevents the crack from returning in the future.
The following project instructions accompany the video and provide more detail on how to finish concrete. Remember, when working with cement-based products, always wear eye protection and waterproof gloves.
Step 1 – Widen the crack to a minimum of 1/4 inch using a chisel and hammer. The edges of the crack should be vertical or beveled in an inverted “V”.
Step 2 – Break away any deteriorating concrete and remove loose material with a brush.
Step 3 – Cut the tip of the nozzle on an angle with a utility knife to match the width of the crack and load into a standard caulk gun. NOTE: for large cracks over 1/2 inch deep, a backer rod should be placed in the crack before applying the sealant.
Step 4 – Slowly draw the gun along the joint forcing a bead of concrete repair caulk deep into the crack.
Step 5 – Remove excess material with a trowel immediately after placement.
- QUIKRETE® Polyurethane Concrete Crack Sealant
- Caulk gun
- Utility knife
- Hammer and chisel
- Stiff bristle brush
- Citrus-based cleaner OR mineral spirits
- Waterproof gloves
- Safety glasses