Sewage treatment plants (STPs), pump stations, and wastewater collection systems operate under some of the most destructive environmental conditions in municipal and industrial infrastructure. Biogenic sulfuric acid (H₂SO₄) generated by hydrogen sulfide (H₂S) gas rapidly degrades concrete and corrodes steel, leading to structural failures and costly downtime. Liquimix provides industry-leading protective coating systems specifically formulated to withstand aggressive chemical exposure, high abrasion, structural movement, and thermal cycles. By pairing Tufflon – P80 Pure Polyurea for expansive, open-air structures with Novolox Novolac Epoxy for high-acid, confined-space environments, asset managers achieve long-term corrosion resistance across every stage of wastewater treatment.
Selecting the correct protective lining requires matching substrate dynamics, chemical concentration, and physical application constraints.
1. Open Area Applications: Tufflon-P80 Pure Polyurea
Open-air structures such as aeration basins, clarifier channels, and external holding tanks experience continuous expansion and contraction due to thermal shifts and structural vibration. Standard rigid coatings crack under these stresses, permitting acid and moisture ingress to reach the concrete rebar.
Tufflon-P80 is a two-component, 100% solids, fast-curing pure polyurea elastomer engineered to accommodate continuous structural movement while delivering high chemical resistance.
2. Confined Space Applications: Novolox Novolac Epoxy
Confined spaces such as wet wells, enclosed manholes, and chemical dosing pits present strict ventilation limits, restricted spray geometry, and extremely high localized concentrations of biogenic sulfuric acid. Fast-reacting spray polyurea equipment can be logistically challenging or safety-prohibitive in tightly enclosed areas.
Novolox Epoxy (Heavy-Duty Novolac Epoxy) is designed for extreme chemical resistance and manual or specialized application in enclosed zones.
| Performance Feature | Liquimix Tufflon-P80 (Pure Polyurea) | Liquimix Novolox (Novolac Epoxy) | Traditional Amine Epoxy | Polyurethane Coatings | Cementitious Mortars |
| Primary Ideal Zone | Open-air tanks, basins, channels | Confined spaces, wet wells, bunds | General dry concrete floors | Light duty waterproofing | Concrete profiling / repair |
| Elongation / Flexibility | High (>400%) | Low (<5%) | Rigid (<2%) | Medium (50–150%) | Rigid (0%) |
| Crack-Bridging Ability | Excellent (Permanent flexibility) | Moderate (Rigid barrier) | Poor (Brittle, cracks with substrate) | Fair | None |
| H₂S & Sulfuric Acid Resistance | High | Extreme (Novolac grade) | Moderate | Low to Moderate | Poor (Acid dissolves cement) |
| Grit & Mechanical Wear | Exceptional (Tough elastomer) | High (Hard shell) | Moderate | Moderate | Low |
| Gel / Cure Speed | 5 seconds (Cures fast) | 20–45 mins pot life | 30–60 mins pot life | 1–4 hours cure time | 24–48 hours cure time |
| Return to Service | Minutes | 24–48 hours | 3–7 days | 2–4 days | 7–28 days |
| Application Method | High-pressure plural spray | Roller, brush, or airless spray | Roller, brush, or squeegee | Roller or single-component spray | Trowel or spray mortar |
Request Technical Data & Specification Support
Protect your wastewater infrastructure with field-proven polyurea and epoxy linings. Contact Liquimix for technical data sheets (TDS), safety data sheets (SDS), or to discuss customized asset specifications with our engineering team.
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