Fill and repair a single crack in a poured basement wall, up to approximately 10 feet. The components included with the kit provide for a permanent repair by injecting with either polyurethane or epoxy. The injection process is completed using a standard caulk gun. The low pressure crack injection process is the most cost efficient and time effective way to repair your basement wall crack. Repaired cracks are completely filled from front-to-back and top-to-bottom.
- Choice of Injection Material
- Two (2) universal cartridges of Emecole Metro 102 Premium Polyurethane injection material
- Four (4) universal cartridges of Emecole Metro 121 Premium Fast Curing Epoxy injection material (for hairline cracks less than 1/16″)
- Choice of Surface Seal
- Two (2) jars of Emecole Metro 901 Surface Seal – cures in approximately two to four hours and stays on the wall after injection
- Fifteen (15) surface ports and caps
- Static mixing nozzles
- Injection hose assembly
- Also included are rubber gloves, safety glasses, wire brush, mixing sticks, drop cloth, plastic trowel and written instructions.
Additional Components Required (Not Included)
- Standard caulk gun (for injection of Emecole Metro 102 Premium Polyurethane)
Polyurethane or Epoxy: Choosing the Right Injection Material
Basement wall cracks are injected with either polyurethane or epoxy. While experienced contractors using crack injection may choose their injection material based on personal preference, we do recommend that homeowners or anyone new to the process follow our recommended guidelines below.
Most Crack Repairs Are Completed with Polyurethane
Most basement wall cracks are non-structural. They develop due to initial settling of the foundation or natural shrinkage of the concrete within a few months after being poured. They are usually thin, anywhere from hairline to 1/8″ wide, and are likely to be vertical. While these cracks can be a nuisance by allowing in water and soil gases, such as radon, they do not pose a structural risk to the foundation.
In these scenarios, the homeowner’s objective is to simply fill the crack, usually because it is leaking water. For these types of cracks, Emecole Metro 102 Premium Polyurethane is the recommended option. Emecole Metro 102 expands up to 20 times its original state of volume upon injection into the wall, which makes it an extremely user friendly material, and provides the best opportunity to fill the crack, forming a flexible and watertight repair. Its expansion capability also makes it the more cost effective option compared to epoxy, which does not expand. As a result, more epoxy is required to fill and repair the same crack.
Structural Cracks Should Be Repaired Using Epoxy
Cracks that form due to movement of the foundation (i.e. settlement, soil pressure or freeze/thaw cycles) may compromise the foundation if left unaddressed over time. These cracks, known as structural cracks, are usually 1/8″ wide or greater and are more likely to be diagonal, horizontal, jagged or stair-stepped.
The added strength of Emecole Metro 121 Premium Fast Curing Low Viscosity Epoxy makes it the best option when repairing structural cracks. Upon injection, Emecole Metro 121 fuses cracks back together, resulting in a very strong and watertight repair. Unlike most epoxies, Emecole Metro 121 begins to rapidly thicken in 15 to 20 minutes, which minimizes the amount of injected material that can leak out into the soil, making the repair stronger than the surrounding concrete.
Since epoxy does not expand, unlike polyurethane, it does require more material to repair the same crack. The positive trade off is that epoxy provides a stronger repair for cracks where foundation movement has been a lingering problem.
Since structural crack widths often vary, we offer two epoxy injection options so that you have enough material to repair up to approximately 10 feet. For hairline cracks (less than 1/16″ wide), select the four universal cartridge option. For cracks 1/16″ to 1/8″ wide, select the eight universal cartridge option.
Choice of Surface Seal
Surface Seal is used to seal basement wall crack surfaces in order to prevent injected Emecole Metro 102 Premium Polyurethane from leaking out the front of the crack. It is also used for the bonding of surface ports to the crack. The Emecole Metro 10 ft. Basement Wall Crack Repair Kit with Polyurethane Injection has two Surface Seal choices:
- Emecole Metro 901 Slow Curing Surface Seal: Cures in approximately 2 to 4 hours. Homeowners not overly concerned with the appearance of their basement wall will opt for this Surface Seal, as it can stay on the wall afterwards. It may be removed, if desired, by chipping or grinding it off.
- Emecole Metro 322 Premium Surface Seal-n-Peel: Cures in approximately 15 to 30 minutes and easily peels off the basement wall afterwards, leaving a clean finished look. This is the ideal choice for homeowners who prefer to remove the surface seal once the crack is repaired. Because Emecole Metro 322 Premium Surface Seal-n-Peel easily peels off the basement wall, no chipping or grinding is necessary.
Repair Cracks from the Inside – No Digging or Drilling
The low pressure injection process for repairing basement wall cracks in poured foundations is completed from the inside. This allows homeowners to inject straight into the crack, while the exterior soil provides a stop-gap to ensure that injected polyurethane stays within the crack, resulting in a completely filled crack.
The included Surface Ports, which adhere to the front of the crack at every six to eight inches, allow for the polyurethane material to be injected straight into the crack. There is no need to drill holes into the wall, helping to save time while reducing unnecessary labor.
Repair Wet & Leaking Cracks with Confidence!
Have an unexpected issue or a pre-sale question? Our customer service team is here to help. Our full-time staff of technical support experts are available to help answer any product or application related questions. As the product developer and manufacturer of our injected materials, our team has the expertise to provide the most thorough product help and technical support available.
The low pressure crack injection process was pioneered by our company dating back to 1987, and became the preferred process by concrete and basement waterproofing contractors throughout the United States and Canada. This proven method will permanently repair your leaking basement wall crack problem.
Frequently Asked Questions
Do universal cartridges still contain Part A and a Part B materials?
Yes, the injection material (choice of polyurethane or epoxy) packaged in universal cartridges for this kit contains both Part A and Part B materials. Our universal cartridge is engineered to separate the two component materials horizontally, ensuring they are not mixed while inside the cartridge.
If the basement wall crack is high enough to raise above grade, does the exterior of the crack need to be covered from the outside?
Yes, any cracks that are exposed on the outside because they are above grade will need to be covered with your included surface seal, otherwise, the injected polyurethane or epoxy will leak out, potentially compromising the repair in addition to also wasting material.
A repair to my basement wall crack was previously attempted with the use of hydraulic cement and has since started to leak water again. Can your product still be used to rectify the previous repair attempt?
Yes. The use of this kit requires access to the crack, so a few extra steps will be necessary. The hydraulic cement should be removed by chipping and grinding in order to gain access to the crack. There are some scenarios where this can become more complicated. For such situations, we advise you get in touch with an Emecole Metro technical support expert for additional ideas or workarounds.
Can this product be used in the middle of winter or when the temperature outside is below freezing? What is the coldest (or warmest) temperature your product will work in?
The ideal temperature for the use of the materials packaged in this kit is between 40 and 100 degrees Fahrenheit. Assuming that the basement is heated, any outside temperature should not impact the performance of the chemicals during the basement crack repair process. The only caveat is that chemicals should not be stored in freezing temperatures.