Materials
Materials
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500
PRODUCTS SUPPLIED YEARLY
600+
tunnel projects
since 1989
70 YEARS
COMBINED TEAM EXPERIENCE
2000 km
in the last
20 years
SUPPLIED OVER
SUPPORTED
About Optimas
Optimas is a global leader in tunnel infrastructure, delivering high-performance fastening and connection solutions. Through its “Sofrasar Tunnel” division, the company offers engineered bolt, dowel, grout, and accessory systems for concrete-segment tunnels, ensuring safety, durability, and reliability. With decades of experience and rigorous European manufacturing standards, Optimas has earned worldwide trust in the tunnelling sector.
Why Leading Manufacturers Choose Optimas
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Specialized tunnel fastening expertise — more than 25 years dedicated to tunnel fasteners and segment fixation systems.
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Full-service engineering support — expert design assistance, finite-element structural analysis, and project-specific technical backing.
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Top-quality and tested components — stainless-steel inserts, bolt systems rated up to 400 kN, grout/lift sockets up to 600 kN, with strict quality control and lab validation before delivery.
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Global supply chain & logistics — reliable delivery worldwide to meet project schedules and reduce supply risk.
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Sustainability & innovation — range includes recyclable materials and modern sealing/fastening alternatives adapted to tight tolerances and advanced tunnel requirements.
Applications
Optimas systems are tailored for a wide range of tunnel types and underground works:
Segment-lined tunnels
(Metro, Railway, Road, Utility)
Reliable assembly and fixation of precast rings with controlled tolerances and durability.
Sewer, cable, and utility tunnels
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Dowel & grout systems ensuring watertightness and long-term structural integrity.
Tunnels requiring high safety and fire protection standards
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With integrated fire-safe inserts and accessories.​
Complex geologies or designs needing precise engineering
benefit from Optimas’s engineering support and custom fastening solutions.
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Projects needing fast turnaround
— thanks to pre-validated components and efficient global logistics.
Project References & Global Footprint
With more than 70 tunnelling projects completed worldwide, Optimas (Sofrasar Tunnel) has built a proven reputation as a leading supplier of fastening systems for precast tunnel segments. Their solutions support a wide range of underground works—from utility tunnels and water-transfer lines to complex metro, rail, and subsea infrastructure. Below is a selection of key references demonstrating their technical capability, reliability, and global reach.
Integrate Optimas Fastening Systems with Farindo
As your local partner in Vietnam, Farindo provides seamless access to Optimas high-performance tunnel fasteners. We handle procurement, delivery, commissioning, and after-sales support, tailoring solutions for metro, sewer, and civil-works tunnels. By integrating fasteners into complete tunnelling packages—including segments, TBMs, and material-handling systems—we simplify coordination, reduce lead times, and ensure reliable, fully supported project execution.
