Fernco 10 ft Basement and Foundation Wall Crack Repair Kit Leak Stop and Radon Gas Protection Pro Kit — Open-Box, 17% Off

REPAIRS CRACKS UP TO ½" WIDE: Seals vertical or diagonal cracks in poured concrete, brick, or stone walls with lasting strength

PROFESSIONAL-GRADE HYPERFLEX PROTECTION: The same polyurethane injection foam trusted by contractors and municipalities—expanding inside cracks to form a flexible, watertight shield of armor around your foundation.

COMPLETE 10-FOOT REPAIR: Each kit is designed to permanently repair up to 10 linear feet of concrete wall cracks.

FORMS A PERMANENT, WATERTIGHT BARRIER: HyperFlex stops active leaks and withstands extreme water pressure for long-term peace of mind.

RADON & SOIL GAS DEFENSE: Provides comprehensive protection against water intrusion and harmful gases, helping safeguard indoor air quality.

NO DRILLING OR EXCAVATION REQUIRED: Non-invasive installation delivers professional-grade results without heavy equipment, downtime, or costly contractor work.

VERSATILE FOR MULTIPLE APPLICATIONS: Effective for basements, crawlspaces, retaining walls, pools, sea walls, and more—residential, commercial, or industrial.

COMPLETE DIY KIT WITH TOOLS INCLUDED: Comes with everything needed—HyperFlex cartridges, epoxy, ports, gloves, and tools—for a true all-in-one repair solution.

The Fernco Basement Repair Kit delivers a permanent solution for foundation cracks by combining ease of use with professional-grade materials. Designed to repair up to 10 feet of vertical or diagonal cracks up to ½" wide, this kit stops leaks at their source with HyperFlex, a polyurethane injection foam trusted by contractors and municipalities for demanding infrastructure repairs. Unlike standard homeowner kits that rely on thin urethane sealants or rigid epoxy alone, HyperFlex expands deep inside cracks, activates with water, and forms a flexible, watertight barrier that moves with your foundation. The result is not only protection from water intrusion but also a shield against radon and harmful soil gases. With no drilling or excavation required, the Fernco Basement Repair Kit provides industrial-strength results in a simple DIY format that saves time, money, and worry. Each kit includes HyperFlex cartridges (x2), surface seal epoxy, Pow-R-Stick putty, injection ports, hoses, nozzle, gloves, mixing sticks, and a protective drop cloth.