Corecell™ S
Reliable Buoyancy. Extreme Depths.
Structural SAN foam core for subsea and offshore applications
Gurit Corecell S is a high-performance SAN foam developed specifically for use in subsea buoyancy systems, delivering exceptional hydrostatic crush strength, minimal buoyancy loss, and long-term reliability at depth. With an ultra-fine cell structure, high water resistance, and outstanding chemical and thermal stability, it is a lower density high-performing alternative to resin-based syntactic foams.
Gurit Corecell S is an ideal choice for components such as subsea buoyancy or storage units, diving bells, ROVs and impact protection structures. It is easy to machine, is thermoformable, and is suitable for use with a variety of processing techniques, offing a high degree of versatility and suitability for complex shapes.
Key Benefits of Corecell S
High Hydrostatic Crush Strength
Can withstand depths up to 2700 m (28 MPa hydraulic crush pressure), maintaining buoyancy and structural integrity
Lower Density Than Syntactic Foams
Delivers equivalent buoyancy at lower density (200 – 450 kg/m³), offering substantial weight savings and easier handling
Low Water Absorption
Closed-cell structure ensures high water resistance, ensuring minimal changes to buoyancy due to seawater penetration
Chemical & Thermal Resilience
Resists degradation in seawater and hydrocarbon environments; offers excellent dimensional stability and insulation properties across a broad temperature range
Low Resin Absorption
Smallest cell size of Corecell range, absorbing minimal resin during lamination and minimising weight gain
Excellent Machineability
Ultra-fine cell size and inherent toughness enable precision cutting, drilling, routing, and thermoforming
Processing and Compliance
- Compatible with epoxy, polyester, and vinyl ester resin systems.
- Processes include infusion, hand lamination, and thermoforming.
- Available in sheet or pre-cut kits, with standard finishing options (plain, pinhole, and vacuum-infusion cut) for maximum flexibility in production.
- Developed and validated according to ASTM D2736 for Hydraulic Crush Pressure (HCP).
- Full DNV and Lloyd’s approvals in progress. Extensively tested for dimensional, thermal, and chemical stability.
Available Densities and typical ranges
Grade
Density
Application Depth (approx.)
Corecell S-200
200 kg/m3
Shallow subsea structures / floatation devices
Corecell S-250
250 kg/m3
General marine and subsea buoyancy
Corecell S-350
350 kg/m3
Mid-depth ROV and instrument housings
Corecell S-450
450 kg/m3
High-load buoyancy and deep subsea equipment
Corecell S-1200 / S-1800
1200-1800 kg/m3
Extreme-depth applications (up to 2700 m)
Typical Applications
ROVs and AUVs (military, research, inspection)
Buoys and subsea floatation modules
Underwater structures and storage units
Diving bells and impact protection structures
Offshore wind and oil installation components
Civil and recreational projects (bridges, floating platforms, sports equipment)
Setting the standard for subsea applications with SAN technology
Corecell S extends Gurit’s proven SAN chemistry into deep water applications — offering a tough, lightweight, and cost-effective solution for reliable buoyancy at depth. It complements Corecell M and Corecell I within the Gurit Corecell family to cover the entire range from marine structures to industrial and subsea systems.
Downloads
Product Brochures
Processing Guides
Gurit Standard Finishes
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