For a bond strength that beats any standard repair concrete, the Damtite vinyl concrete patch is the best it gets. It is a self-bonding vinyl concrete that can be used on most concrete cracks, is able to build up the corner of steps, and will bond other materials such as tile and stone.
Polyurethane-based products, including Sakrete Non-Sag Sealant and Sakrete Self-Leveling Sealant offer better performance with a superior bond and flexibility for cracks up to ½” deep and wide. Polyurethane-based products require acetone or similar chemicals for cleaning but deliver superior durability and longevity.
The use of a concrete backer rod is recommended for cracks wider than 1/4-inch, since these cracks are usually deep. The backer rod is inserted into the crack to minimize the amount of filler needed, and make for a more uniform repair.
Mix and trowel reinforced patching compound into the crack. Depending on the size of the patch, you may use a caulk tube, bottle or pre-mixed compound from a bucket to make the repair.
If you need to repair a concrete crack that's a minimum of 1/4-inch wide up to a maximum of 1 1/2-inches wide and 1/2-inch deep, then our top recommendation is Sikaflex Pro Self-Leveling Sealant. This polyurethane sealant dries to the touch in just one or two hours but can take three to five days to fully cure.
Choose acrylic latex
Alex Plus is one good choice, but there are several others. If you are dealing with a large recurring crack in a wall corner or in a crown molding joint, choose a product with better flexibility such as a hybrid formula or Big Stretch acrylic caulk.
Deep Patch™ is a single component, cement-based patching compound that goes from 1/8 inch – 2 inch (. 32 - 5 cm) and up to 4 inches (10 cm) with the addition of # 8 pea gravel.
Easily repair concrete cracks and holes with Rust-Oleum® Concrete Patch & Repair. This two-part, industrial-strength epoxy permanently bonds concrete, won't shrink or crack and creates an extremely hard surface that is stronger than concrete.
There are various sealing chemicals in the market with different specifications: Epoxy resins (EP) may be a solution for dry passive concrete crack repair. Polyurethane (PU/PUR/SPUR) may be useful for active cracks or to stop water ingress. Acrylate / acrylic to cure concrete leaks from cracks.
Small cracks (less than 1/4 inch in width and depth) can be repaired using concrete or asphalt filler. Medium cracks (1/4 to 1/2 inch) should be repaired with patching compound or pre-mixed mortar. Large cracks (more than 1/2 inch) need to be repaired with pre-mixed concrete or asphalt (the cold patch variety).
According to HomeAdvisor, a driveway repair professional will charge as little as $300 to fix minor concrete driveway cracks, but most homeowners can do the job on their own with a rubber or synthetic crack filler. This costs about $0.10 to $0.15 per linear foot—but watch out if cracks are larger than 1/8 of an inch.
Drywall cracks that are less than a 1/8 inch wide (“hairline cracks”) can often be repaired with spackling, drywall joint compound (drywall mud) or drywall tape.
To repair your garage floor cracks, you will need to decide between using an epoxy material, polyurea repair liquid, or polymer concrete caulk. Consulting an expert is the best way to find out which repair method makes the most sense for your particular garage floor cracks or joints.
Concrete epoxy is a popular product used for filling in cracks on exterior walls that are made from concrete. Depending on the size of the crack, the concrete epoxy will either need to be injected into the crack or worked in with a brush.
Joe Truini: When using caulk to seal cracks and holes around the house or outside, it's important to make sure the crack is no wider than a quarter of an inch, because if you just put in caulk, the caulk will fail, because the crack is too wide.
If you need to seal junctions between walls and seal cracks in ceilings or walls then it's better to use Caulk because it dries quicker and is much more resistant to weathering and high temperatures.
Foam & Fill® Large Gaps & Cracks Expanding Polyurethane Sealant is quick and easy to use. It expands to fill holes, cracks, gaps, and voids around windows, doors, pipes, outlets, vents, and foundations. This insulating foam forms an airtight, waterproof bond and seals out drafts, moisture, and pests.
Best Two-Part Epoxy Patching Compound—PC Products Masonry Epoxy Adhesive. To seal cracks that are leaking water or to resist extreme temperatures, an epoxy patch like the PC Products masonry epoxy adhesive is a great solution.
There are two main components of foundation crack repair and those are epoxy and polyurethane foams. The concept is to use a tool similar to a caulk gun to inject the material into the crack.
Emecole Metro 121 Premium Fast Curing Epoxy
Our most popular and strongest injection material for repairing structural foundation cracks. Our most advanced epoxy selection due to it's ability to rapidly thicken within minutes, minimizing loss of material into the soil.