Concrete Foundation Leak Repair Made Easy
Non-Structural Vertical or Diagonal Foundation Cracks
Base Kit Components 10 ft Polyurethane Foam Concrete Crack Injection kit Premium Polyurethane Foam #102 . Enough material to inject a 3/16" wide by 10 ft. long crack
cartridge of Crack Seal and Port Adhesive type 903 Paste.
Read basic repair procedure
Shipping! USA & Canada
Easy-to-Use as DIY Kit or Upgrade to a Professional Tool same products
D-I-Y Polyurethane Foam Crack Injection Kits offer a professional-grade solution against water leaks in leaking concrete walls. The kit is so user-friendly that even someone who has minimal D-I-Y project experience can use it. No construction expertise or specialized equipment is required because no exterior digging or excavation is needed for the project. The low-pressure injection process from the inside fills up the cracks, pores, pipe openings, voids, joints, and is an easy and straightforward industry-approved method.
When is it recommended to use Polyurethane Foam Injection?
We recommend using the Polyurethane Injection kits for sealing and waterproofing non-structural cracks in poured concrete walls. Low-pressure foundation crack injection kits are the recommended solution for leaking, wet, or damp cracks or flaws. The kits listed work very well for concrete fractures from 1/32 (1mm) to ¼ in (65mm).
Active leaking cracks. Should the concrete foundation crack be ultra-fine, been repaired before, not visible but will not stop leaking or weeping. It may be better to use our High-Pressure Polyurethane kit as it does not matter if that foundation wall is wet or not.
Why Polyurethane Foam Crack Injection Works
NextStar has engineered kits to offer a lasting repair solution for leaking cracks in concrete foundation walls. Here are the various reasons why it is more effective than the other options available in the market.
The high-density foam expands over ten times its original size and does not lose its volume over time. In other words, the seal it creates is permanent.
When the foam cures, it forms a semi-flexible resin. This flexibility preserves its integrity over many decades, despite ground movement and continuous changes in temperatures and seasons. As a result, this is a powerful basement waterproofing method.
Tips & Notes for Repair of Leaky foundation walls and cracks
1. Don’t be in a rush to complete the crack injection process; it can take up to 5 minutes for the Polyurethane to travel to the next port.2. Very Small Hairline Cracks require that you heat the Polyurethane Cartridge in advance by placing it in hot water.3. Above Grade Cracks on the foundation's exterior need be sealed up with epoxy paste from the kit, sealant, or hydraulic cement to keep the product in the wall during the injection curing process.4. Corner Cracks The standard injection ports can be cut or bent to fit in a corner crack if you have no corner ports or add the option to your order.5. Spring Loaded Contractor Application Tool . We recommended if you plan to do 30 or more feet of repairs or plan to do ongoing large foundation repair projects.6. Dry Concrete walls The wall that you are applying the sealing epoxy paste should be dry and clean while doing the sealing; after that, it can be wet. A wet wall prevents the port can crack sealer from sticking to the wall.
The Seven Steps to complete Low-pressure Concrete Polyurethane Crack Injection.
1. Using the Wire brush provided clean vigorously the crack's length to remove any debris or loose paint so that the surface is clean to attach the surface ports.2. Using the port setting, paste dispense on cardboard or paper plate and mix by hand a small amount until it turns grey.3. Using the paste, attach the surface ports to the wall every 8-10 inches apart.4. Hand mixing more surface and port setting paste now seal up between the ports and over the exposed crack to keep the product in the wall during the injection. Let the sealing paste cure until it is hard for 1-2 hours.5 . Using the syringe provided or water bottle, flush some water into each injection port; this will see if the port is open to inject resin and provide the moisture that polyurethane injection resins need to start the chemical reaction foaming. Flushing water will also show if an adequate job of sealing the6. Install a static mixing tube on the end of a cartridge and install it into the dual dispensing tool. A feed hose will make it easier to get at hard-to-reach ports.7. Start at the lowest level port of the foundation crack in the wall. Start injecting in this port slowly until it arrives at the next port above. Cap this port and move up to the next port and repeat the process until completed. Once you get to the last port, all of the previous work is now waterproof.
When is this kit not suitable, and you should use Epoxy? When you have a crack that requires structural reinforcement, you need to use an injection material that provides strength and support to the wall. Polyurethane foam is not a suitable choice for this purpose. A NextStar Kit is customized to offer complete protection against foundation wall cracks and water intrusion. Polyurethane Foam does not provide any structural strength. Usually, the limit for these types of low-pressure crack injection is ¼ in (1cm). In such a case, Nexstar’s Epoxy Foundation Crack Repair Kits would be the ideal choice. For structural strength, Epoxy Resin is used in a similar method and injected with low pressure but technically glues the wall back together as one piece. Still, if the wall is seasonally moving, you should reinforce the foundation wall cracks with Carbon Fiber reinforcement after the injection repair.
FYI? Structural cracks in basement walls are generally horizontal.
Wide horizontal or diagonal cracks are a sign of structural problems, and you may need to contact a local structural engineer for recommendations.
Example of Structural cracks that should use Epoxy
This example Picture is of a basement wall that clearly has some structural problems and in this example, it will require both epoxy injection and wall reinforcement with carbon fiber to stabilize. This particular basement also required excavation to install a waterproofing membrane and weeping tile. If you have a problem like this refer, to the Epoxy Page .
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