The strength of cured bonding epoxy is typically around 7000 psi whereas the tensile strength of concrete is in the range of 275 – 750 psi; clearly, the bonding strength of 2 part bonding epoxy is much greater than that of the concrete foundation wall; making epoxy a good choice for foundation wall crack repair.
When a crack is under pressure it opens up; therefore, a material that cannot handle the pressure will rip apart. Epoxy is the best component to use when a concrete crack is under pressure.
The curing time allows the epoxy to gravity feed within the crack, thereby filling all parts of even the finest cracks.
Epoxies can be obtained in various viscosities to suit very fine to very wide cracks. It is also possible to obtain very low viscosities for epoxy on-the-job in order to properly fill very fine hairline cracks.