Municipal underground comprehensive utility tunnels contain water supply, sewage, electric power and communication pipelines, with underground high humidity, sewage volatile gas and corrosive soil all year round. Ordinary thin epoxy coating will bubble and delaminate within short time after contact with sewage medium.

FLDC dedicated underground tunnel inner wall anti-corrosion epoxy system, low odor construction formula, safe for closed narrow tunnel space.

Complete lining coating system for utility gallery:

1. Epoxy Zinc Phosphate Primer: Firm adhesion on concrete & steel inner wall
2. Epoxy Thick-Film Intermediate Coat: Block underground corrosive gas penetration
3. Solvent-Free Epoxy Anti-Corrosion Top Lining: Resist sewage & acid-base medium Core Advantages: ✅ Low odor solvent-free formula, suitable for confined underground construction ✅ Resist sewage vapor, underground acid & alkaline soil erosion ✅ Strong bonding with concrete and steel dual substrates ✅ No blistering under long-term damp underground environment ✅ Meet municipal infrastructure environmental acceptance standards

Our tunnel lining coatings have been applied in multiple city underground corridor renovation projects. Contact us for construction specification document.