Eissa Fiber Glass LLC provides reliable GRP, FRP and GRE solutions for construction, infrastructure, industrial, marine, power and water-treatment applications across the UAE.
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Eissa Fiber Glass LLC provides reliable GRP, FRP and GRE solutions for construction, infrastructure, industrial, marine, power and water-treatment applications across the UAE.
Get a Quote
GRP (Glass Reinforced Plastic) liners and benchings are corrosion-resistant, lightweight, and manufactured to high-quality standards. They protect underground structures such as manholes, chambers, and pipelines from aggressive chemical degradation, biogenic acid attack, and environmental moisture infiltration.
Produced using automated filament winding or precision hand lay-up processes, our GRP liners ensure exact dimensional tolerances, exceptional structural strength, and enduring reliability. They act as a permanent corrosion barrier that eliminates concrete corrosion caused by hydrogen sulfide (H₂S) gas in municipal and industrial sewer networks.
Engineered to meet stringent municipal and drainage authority criteria:
| Parameter | Design Range & Standards |
|---|---|
| Internal Diameters | 600 mm to 3,000 mm (custom step-down and tapered transitions available). |
| Shaft Lengths | Up to 12.0 meters continuous sections (custom lengths to suit depth requirements). |
| Material Composition | High-performance thermosetting resin (Isophthalic / Vinyl Ester) with multi-axial glass fiber reinforcement. |
| Manufacturing Process | Continuous Filament Winding or Contact Molded Hand Lay-up based on load and profile complexity. |
| Surface Finish | Resin-rich, ultra-smooth internal hydraulic finish; optional silica grit anti-slip coating on benchings. |
| Integrated Components | Liner shafts, molded benching units, cover slabs, gully ports, pultruded GRP ladders, and safety handrails. |
Pre-formed composite base units designed with integrated hydraulic flow channels, invert channels, and branch connections for seamless wastewater redirection.
Cylindrical or rectangular composite riser shafts fitted with top reducing slabs and access manholes, providing continuous corrosion isolation from ground level down to the invert.
Sewer environments produce hydrogen sulfide (H₂S) gas, which bacteria convert into sulfuric acid, rapidly eroding concrete walls. GRP liners are totally inert to biogenic sulfuric acid, isolating the concrete structure behind an impermeable, non-corroding barrier.
Yes. In addition to serving as permanent lost shuttering for new cast-in-place concrete chambers, our GRP liners can be dropped into deteriorated existing manholes and annularly grouted to fully restore structural stability and leak-tightness.
Yes. We engineer composite benchings with pre-aligned inlet and outlet pipe connection stubs or flexible gully ports manufactured to match your exact site layout drawings, flow levels, and connection angles.
Yes. We can factory-fit corrosion-resistant GRP pultruded ladders, safety cages, drop pipe brackets, and non-slip benching surfaces prior to delivery, significantly reducing on-site installation time.