Why You Should Use a Spring Drive Gun. It is important to have a smooth and even flow when injecting concrete crack repair materials. This minimizes 'blow outs' where the surface paste loses its bond to the wall from too much injection pressure. The epoxy or polyurethane concrete crack repair materials is injected into the concrete crack through these ports. These ports have a wide base that gives a strong adhesion to the concrete. Concrete Crack Repair Methods. Single or dual cartridge resin cartridges and a hand trigger injection gun is the most common method to repair a.
Project Instructions When working with cement-based products, always wear eye protection and waterproof gloves. QUIKRETE Concrete Repair or QUIKRETE Self-Leveling Polyurethane Sealant may be used. Step 1 Widen the crack using a chisel and hammer to a minimum of ¼ inch and break away any deteriorating concrete (the edges of the crack should be vertical or beveled in an inverted “v”).
NOTE: for vertical cracks less than 1/2-inch wide and for cosmetic repairs, the best option is to use a textured acrylic caulk. Step 2 Remove loose material with a brush. Option A: QUIKRETE Concrete Repair Step 3a Cut the tip of the QUIKRETE Concrete Repair nozzle on an angle with a utility knife to match the width of the crack and load into a standard caulk gun.
Step 4a Slowly draw the gun down the crack, forcing a bead of Concrete Repair caulk deep into the crack. TIP: Concrete Repair can be tooled with a trowel to match the surrounding surface immediately after placement. It will begin to form a skin in about 20 to 40 minutes and will harden completely in 1 to 2 hours. Option B: QUIKRETE Self-Leveling Polyurethane Sealant Wear eye protection and waterproof gloves when working with polyurethane sealant. Step 3b Cut the tip of the nozzle at an angle with a utility knife matching the width of the crack and insert the tube into a standard caulk gun.
NOTE: For cracks or joints over 1/2 inch, a Backer Rod should be placed in the crack before applying the sealant. Step 4b Move the nozzle slowly along the length of the crack, allowing the sealant to settle.
TIP: this may require an additional application, which should be done immediately so that the two applications will mend into each other. Step 5b Excess sealant should be cleaned up immediately with a commercial solvent or a citrus-based cleaner.
TIP: polyurethane sealants are temperature sensitive and should not be used when temperatures are below 50 degrees. Shopping List. (caulk) Or. Wire brush.
Caulking gun. Scrub brush. Chisel. Hammer.
Gloves. Safety glasses.