Structural epoxy liners are engineered to restore and line critical water and wastewater infrastructure. Designed for ultra-high build application with exceptional mechanical film strength, these systems bond directly to the host substrate to create a lining system that protects against corrosion and seals inflow and infiltration (I&I). Structural epoxy linings can deliver spanning capability to bridge small unbonded areas, which is a feature that ensures a long service life especially in below-grade environments. In addition, for some applications, high film strength can serve for calculated design thicknesses required in pipelining to resist earth loads, traffic, and internal pressure. This technology offers a cost-effective solution for extending service life while minimizing disruption to buried assets.