Gurit Corecell S Gains DNV Certification for Underwater Technology Applications

Updated on May 27, 2026 • 2 min read

Gurit has announced that Corecell S structural foam core is the first non-syntactic foam to achieve DNV certification for underwater technology applications.

The certification covers DNV type approval for sandwich core materials and underwater technology rules for materials used in UWT systems.

Designed for subsea environments

Corecell S is engineered for demanding subsea and offshore applications requiring strength, durability and buoyancy stability under hydrostatic pressure.

Key properties include:

• high hydrostatic crush strength
• minimal buoyancy loss
• ultra-fine cell structure
• high water resistance
• chemical stability
• thermal stability
• long-term durability at depth

Target applications

The certified material is suitable for:

• subsea buoyancy systems
• subsea storage units
• remotely operated vehicles
• diving bells
• impact protection structures
• offshore composite components

Manufacturing compatibility

Corecell S can be processed with:

• epoxy resin
• polyester resin
• vinyl ester resin

and supports manufacturing methods including:

• infusion
• hand lamination
• thermoforming

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This article is developed based on real engineering experience, machine testing data, and practical production knowledge from Jota Machinery’s work in advanced composite manufacturing.

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Editorial Perspective

This certification matters because subsea materials face extreme pressure, water exposure and long service-life requirements.

By gaining DNV certification, Corecell S gives offshore and underwater technology manufacturers a qualified non-syntactic foam option for sandwich composite structures.

For Gurit, it strengthens the company’s position in the subsea market and supports broader adoption of composite core materials in underwater systems.