DIY Leaky Basement Wall Crack Repair Kit (10 ft.) for Homeowners - Repair Poured Concrete Foundation Wall Cracks, the Waterproofing Contractor&rsquo;s Preferred Solution Permanent repair. User friendly foundation crack repair for DIY Homeowners. Effectively fill leaking basement wall cracks. Prevents water from entering the crack. Low viscosity polyurethane formulated for injection into hairline cracks or up to 3/16 wide. Inject from inside foundation wall via standard caulk gun. Requires no drilling into concrete. We are a pioneer of low pressure concrete crack repair dating back to 1987.