103 Polyurethane cracked concrete foundation walls with cracks larger than 1/8in
Nextstar 103 is a custom polyurethane liquid that is designed to be used with wider cracks in concrete walls where other polyurethanes will shrink after application. Nextstar 103 will stop water infiltration. When 103 meets water, it reacts with it and then repels any excess water, forming a closed-cell foam barrier that will not allow water to pass through it. Nextstar 103 polyurethane does not require water to be injected first and It adheres tenaciously to practically all substrates, wet or dry.
Nextstar 103 is typically used to stop water leaks coming through cracked or honeycombed concrete, voids between walls and floors, walls and ceilings, expansion joints, cold joints, void fill, and pipe intrusions. It is designed to be used when the crack size exceeds 1/4 in (6mm) or where epoxy is not considered necessary.
Nextstar 103 Uses
103 is used to repair concrete walls, ceilings, and leaking basement cracks. It is the most commonly used product for general foundation crack repair, which is non-structural and may be leaking.
- Wider poured concrete wall cracks that are more 1/8in (3mm) or wider
- Water is not required for the chemical reaction to start
- Very fast cure, less than one hour, depending on temperature
- Fast initial reaction time for faster repairs
- Very aggressive foaming action for tight bonding
- 20x expansion rate
- Can be used as a replacement for structural foam
Application Larger Crack Repair
Using standard low-pressure crack injection methods.
Do not use with feed hoses because of fast reaction time.
Requires a dual 300 mL application tool
Packaged in Dual 300ML Tubes supplied with nut and static mixer tube.
Registered Contractors get special pricing.
The Mixer recommended for this polyurethane is the 1/4x 24 static mixer. but recommended 3/8x24 mixer
Price per 600ml Tube set
Other Polyurethane Crack Injection Products

Links to the other Polyurethanes
NextStar 102 Dual Cartridge Polyurethane Standard use product
Koster 2N1 Dual Cartridge Polyurethane
NextStar 120 Dual Cartridge Structural Foam For large cracks only
NextStar 100-800 High-Pressure Polyurethane used with Electric High-Pressure Pump or Manual Tool