The Endurobar range.
Straight bars, custom bends, mesh and fabricated composites — all corrosion-free, all engineered to the same century-plus standard.
GFRP Rebar
Straight, sand-coated bars from 3.0mm to 25.0mm in 6/9/12m lengths. The corrosion-free replacement for TMT steel.
Bent Bars & Stirrups
L-bends, U-bends, links and stirrups pre-formed to your bar-bending schedule — no site fabrication needed.
GFRP Mesh
Pre-tied reinforcement mesh for slabs, screeds, pavements and industrial floors. Lightweight and fast to place.
Gratings & Manhole Covers
Load-rated FRP gratings and covers that never rust, never get stolen for scrap, and never need repainting.
Cable Trays
Non-conductive, corrosion-proof cable management for industrial, chemical and coastal installations.
Precast Cages
Prefabricated GFRP cages and assemblies built to your drawings for precast and modular construction.
Substitution by Tensile Strength
One Endurobar bar replaces a heavier steel one
Matched for equal ultimate stress. Note the dramatic weight saving per 12-metre bar — the reason freight and handling costs collapse.
| GFRP Ø | GFRP kg/12m | Steel Ø | Steel kg/12m |
|---|---|---|---|
| 3.0 mm | 0.185 kg | — | — |
| 3.5 mm | 0.280 kg | — | — |
| 4.5 mm | 0.468 kg | 6 mm | 2.75 kg |
| 6.0 mm | 0.570 kg | 8 mm | 4.74 kg |
| 7.0 mm | 0.900 kg | 10 mm | 7.40 kg |
| 8.0 mm | 1.200 kg | 12 mm | 10.65 kg |
| 10.0 mm | 1.600 kg | 14 mm | 14.52 kg |
| 12.0 mm | 2.400 kg | 16 mm | 18.93 kg |
| 14.0 mm | 3.240 kg | 18 mm | 24.00 kg |
| 16.0 mm | 4.870 kg | 22 mm | 35.76 kg |
| 18.0 mm | 6.280 kg | 25 mm | 46.22 kg |
| 20.0 mm | 8.080 kg | 28 mm | 58.02 kg |
| 22.0 mm | 9.800 kg | 32 mm | 75.79 kg |
| 25.0 mm | 11.670 kg | 40 mm | 118.52 kg |
Values are approximate and matched at equal ultimate stress. Confirm final substitution with your structural engineer.
Mechanical Properties
Endurobar GFRP vs. metal rebar
| Property | Metal Rebar | Endurobar GFRP |
|---|---|---|
| Tensile strength (MPa) | 500 – 600 | 1000 + |
| Shear strength (MPa) | 120 | ≥ 150 |
| Bond strength (MPa) | 14 | ≥ 11 |
| Compression (MPa) | 500 | 450 |
| Modulus of elasticity (GPa) | 160 – 200 | ≥ 50 |
| Elongation (%) | 25 | ≥ 1.5 |
| Durability | Per special building codes | 80 years + |
| Density (t/m³) | 7.8 | 1.9 |
| Corrosion resistance | Rusts in aggressive env. | Inert in alkaline concrete |
| Electrical conductivity | Conductive | Dielectric |
Engineered Attributes
Eighteen reasons engineers switch
Frequently Asked
Answers for spec engineers
Yes — but on a like-for-strength basis, not like-for-diameter. Because Endurobar carries roughly double the tensile stress, our engineers provide the exact equivalent diameters and spacing for your design loads.
Absolutely. Endurobar is BIS-licensed and manufactured to IS 18256:2023 and IS 18255:2023, with ASTM D7957 conformance and NHAI approval for infrastructure work.
Bends are formed during manufacture — GFRP cannot be bent on site like steel. Send us your bar-bending schedule and we deliver ready-formed bent bars, stirrups and links.
Standard diameters run 3.0mm to 25.0mm in 6m, 9m and 12m lengths, with custom lengths and shapes to order.
Because there is no steel to corrode, the reinforcement itself does not degrade. Design service life exceeds 100 years, versus 30–50 for steel in aggressive environments.