Always wear eye protection and waterproof gloves when working with polyurethane sealant and work in a well-ventilated area.
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”).
Break away any deteriorating concrete and remove loose material with a brush.
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.
Slowly draw the gun along the joint forcing a bead of concrete repair caulk deep into the crack.
Remove excess material with a trowel immediately after placement.
- QUIKRETE® Polyurethane Concrete Crack Sealant
- Caulk gun
- Backer rod (optional)
- Utility knife
- Hammer and chisel
- Stiff bristle brush
- Citrus-based cleaner OR mineral spirits
- Waterproof gloves
- Safety glasses