Municipal sewer networks and wastewater infrastructure are constantly exposed to hydrogen sulfide (H₂S) gas, biogenic sulfuric acid corrosion, groundwater infiltration, and heavy structural loading. Traditional concrete manholes deteriorate over time, leading to environmental contamination and costly asset failures.The Liquimix Polyurea System combining Civilox LV100 deep-penetrating epoxy primer with Tufflon P90 100% pure polyurea provides an elastomeric, corrosion-resistant protective lining designed to extend manhole service life by 20+ years.
Why Choose Liquimix Polyurea for Manhole Rehabilitation?
1. Rapid Cure & Minimal Bypass Time Unlike conventional epoxy or cementitious coatings that require days to cure, Tufflon P90 gels in 5 seconds and can handle traffic or water immersion within minutes to hours. This dramatically reduces sewer bypass pumping costs and minimizes disruption to municipal traffic.
2. Elimination of Pinholes & Moisture Blistering Concrete outgassing and dampness are leading causes of coating failure in underground structures. Civilox LV100 is a 100% solids, low-viscosity epoxy sealer that deeply penetrates wet or dry concrete pores, sealing the substrate and preventing pinholes before Tufflon P90 is applied.
3. Crack-Bridging & Dynamic Flexibility Ground movement, soil settlement, and thermal expansion cause concrete manhole rings to shift and crack. Tufflon P90 maintains over 350% elongation and permanently elastomeric properties, bridging movement cracks up to 1.5 mm without rupturing or debonding.
4. Resists Biogenic Sulphuric Acid & Harsh Wastewater Chemicals, protecting the manholes from microbiologically induced concrete corrosion. Tufflon P90 is resistant to microbial acid attack, alkalis, petrochemicals, and aggressive industrial effluents.
Project completed by TriKing.
Pro Tip for Applicators: Always schedule Civilox LV100 primer application during the late afternoon or evening when the substrate temperature is dropping to prevent outgassing bubbles caused by rising temperatures.
1. Surface Preparation:
2. Patching & Profile Restoration:
3. Priming with Civilox LV100:
4. Spray Application of Tufflon P90:
| Property | Liquimix System (Civilox LV100 + Tufflon P90) | Standard Epoxy Coatings | Cementitious Mortar / Renders |
| Gel / Set Time | 5 seconds | 20 – 60 minutes | Hours to days |
| Return-to-Service | Immediate to 24 Hours | 3 to 7 Days | 7 to 28 Days |
| Elongation & Flexibility | >350% (Permanently Elastomeric) | Very low (<5%, Rigid) | Rigid (0% Flexibility) |
| Crack-Bridging Ability | Bridges up to 1.5 mm cracks | Poor (Cracks propagate through) | None |
| Moisture Tolerance | High (Civilox seals damp concrete) | Moderate to Low | High (Water-based) |
| Pinhole Resistance | Superior (Densely sealed by Civilox LV100) | Prone to pinholes from outgassing | Highly porous |
| H₂S & Acid Corrosion Resistance | Excellent | Good | Poor (Degrades rapidly under acid) |
| Impact & Abrasion Resistance | High Hardness (Shore 90A) / High Tear | Brittle under thermal expansion | Prone to chipping & erosion |
| VOC / Environmental Impact | 0 g/L VOC (100% Solids) | Often contains solvents | Cement-based |
Protect Your Infrastructure Today.
Don’t wait for biogenic sulfide corrosion or structural leaks to compromise your manhole network. Contact Liquimix for a technical consultation on your manhole rehabilitation or new-build project.
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