GRP Rebar
Corrosion-resistant, lightweight and high-strength composite rebar for concrete reinforcement in marine, chemical and civil engineering applications.
Engineered Composites GRP Rebar, also known as FRP (Fibre Reinforced Polymer) rebar, is a high-performance alternative to steel for reinforced concrete structures. Manufactured using pultruded glass fibres and resin, GRP rebar provides exceptional durability in harsh environments where steel would corrode or degrade.
It is non-metallic, non-magnetic and lightweight, making it easy to handle, cut and install with no risk of rust, conductivity or long-term corrosion.
GRP Rebar
Our GRP Rebar Solutions
Explore our specialist GRP Rebar product range designed for high-performance reinforcement in demanding structural and corrosive environments.
Our GRP Rebar products are precision-engineered to meet the rigorous demands of modern infrastructure projects.
Tensile Strength: 483–1600 MPa depending on grade
Elastic Modulus: ~50,000 N/mm²
Bending Strength: ~400 N/mm²
Shear Strength: ~460 N/mm²
Diameter Range: 6mm to 32mm
Available Lengths: Available in 5m Lengths
Weight Advantage: ~70% lighter than steel
Finish: Sanded for improved adhesion
Engineered Composites’ GRP Rebar complies with all relevant mechanical and safety benchmarks for reinforced structures in transportation, utility, and civil sectors.
Corrosion Resistance: Impervious to rust and decay in wet conditions
Non-Conductive: Safe near electrical systems and cable ducts
Non-Magnetic: No electromagnetic interference
Fire Safe: GRP inherently resists ignition and meets fire compliance standards
Compressive Strength: Supports structural integrity in load-bearing concrete
Compliant Use: Proven performance in HS2 tunnel wall pillars and rail infrastructure
Corrosion & Weather Resistant
No rust, rot, or degradation over time
Non-Conductive & Fire Retardant
Safe for electrical and industrial sites
Lightweight & High Strength
Easy to install with exceptional durability
Why Choose GRP Rebar?
Our GRP Rebar is engineered for strength, longevity, and corrosion resistance. It performs reliably in demanding environments without the weight, conductivity, or corrosion issues of traditional steel.
Corrosion Resistant
Will not rust, rot, or degrade in harsh or chemical environments.
Lightweight & Easy to Install
Easier to transport and handle on-site, reducing installation time and labour.
Non-Conductive & Safe
Ideal for use around electrical systems, improving onsite safety.
Durable & Long-Lasting
High strength-to-weight ratio with excellent fatigue resistance.
Low Maintenance
No need for protective coatings or ongoing treatment.
Need Help Specifying GRP Rebar?
Let our team help you choose the right diameter, finish and layout for your project. We offer expert support and fast delivery across the UK.
Applications of GRP Rebar
GRP Rebar is increasingly specified in construction projects that require corrosion resistance, non-conductivity, or reduced weight. Below are common applications categorised by environmental and technical requirements.
GRP Rebar is ideal for structures that endure regular exposure to de-icing salts, which typically cause corrosion in steel reinforcement.
Examples include:
Bridge decks
Car parks
Elevated roadways
Marine environments demand corrosion-resistant solutions. GRP Rebar offers excellent durability for coastal and submerged installations.
Examples include:
Caissons
Dry docks
Jetties, piers, and quays
Offshore platforms
Sea defences and walls
In industrial settings with high chemical exposure, GRP Rebar ensures long-term durability without the need for extensive maintenance.
Examples include:
Chimneys
Petrochemical plants
Paper/pulp mills
Nuclear power stations
Wastewater treatment plants
GRP Rebar’s non-metallic, non-magnetic properties make it suitable for environments where electromagnetic interference or conductivity poses safety risks.
Examples include:
Airport control towers
Aluminium/copper smelting plants
Telecoms and transmission tower bases
Railway crossings
Toll road sensor arrays and booths
MRI suites in hospitals
GRP Rebar can be used in tunnel linings and mining walls that are later excavated or demolished, thanks to its compatibility with mechanised boring and low removal resistance.
Examples include:
Mining walls
Underground rapid transport structures
Vertical access shafts
In areas with poor load-bearing soil, remote access, or seismic sensitivity, the lightweight properties of GRP Rebar reduce structural load and logistics costs.
Examples include:
Remote location infrastructure
Foundations in soft soil
Earthquake-prone regions
GRP Rebar is compatible with thermally insulated concrete and prevents thermal bridging. It’s suitable for environments that require controlled heat retention.
Examples include:
Thermally insulated housing
Heated basements and floors
GRP Rebar has a lower through-life environmental impact than steel rebar:
Lower energy use in production
Lighter weight = reduced transport emissions
Smaller required concrete cover means less cement
Extended lifespan due to corrosion resistance
Less maintenance chemicals used
Easier demolition and recycling with concrete aggregate
Discover More About GRP Rebar
What Clients Say About Our Company
GRP Rebar FAQs
GRP Rebar, also known as Glass Reinforced Plastic Rebar, is a non-metallic alternative to traditional steel reinforcement. Unlike steel, GRP rebar is corrosion-resistant, non-conductive, and lightweight. It’s made from continuous glass fibres and thermosetting resin, making it ideal for construction in harsh environments where steel would rust or degrade. GRP rebar also reduces maintenance costs over the long term.
GRP rebar is commonly used in marine environments, bridge decks, retaining walls, foundations, tunnels, and chemical plants. Thanks to its resistance to corrosion, it’s the preferred choice for infrastructure exposed to saltwater, moisture, or harsh chemicals. It’s also ideal for use in non-magnetic or electrically sensitive areas where traditional steel reinforcement could cause interference or pose safety risks.
Yes, GRP rebar supplied by Engineered Composites meets key UK and international standards including BS EN ISO 13706 and ASTM D7957. These standards ensure mechanical strength, chemical resistance, and fire performance, making it suitable for public infrastructure and commercial projects. It also aligns with HS2 and Network Rail specifications, offering reliable compliance for safety-critical applications.
GRP rebar typically lasts much longer than steel in corrosive environments. With a projected lifespan exceeding 100 years under normal service conditions, it resists degradation from water, salt, chemicals, and UV exposure. Unlike steel, GRP does not require coatings or treatments to maintain performance, offering long-term durability and reduced lifecycle costs.
Absolutely. GRP rebar has a high tensile strength-to-weight ratio, making it suitable for many structural and load-bearing applications. It can outperform steel in specific conditions, especially where corrosion is a concern. While it has a lower modulus of elasticity, engineers can compensate by adjusting design specs. It’s widely used in foundations, precast concrete, and infrastructure projects.
Yes, GRP rebar is a sustainable choice. It reduces environmental impact by eliminating the need for rust-proof coatings and frequent maintenance. Its long lifespan and corrosion resistance mean fewer replacements and repairs, which lowers resource consumption. Plus, its lightweight nature reduces transport emissions, making GRP rebar a greener option for eco-conscious construction projects.
Choosing the right GRP rebar depends on your project’s exposure to moisture, chemicals, electrical interference, and load demands. At Engineered Composites, we offer a range of GRP rebar sizes, surface finishes, and specifications, including sand-coated or epoxy resin options. Speak with our technical team to ensure the optimal product selection based on BS, ASTM, or project-specific standards.