Reef mats - Offshore Concrete Mattress for Cable & Pipeline Protection

Reef mats are a low-carbon articulated concrete mattress system engineered as a full-scale subsea protection solution for offshore cable and pipeline stabilisation, seabed consolidation and scour protection. Built to the same functional and handling standards as conventional industry mattresses, they deliver equivalent structural performance while introducing a new focus on sustainability and biodiversity enhancement.

Completely plastic-free and made using ARC marine’s Marine Crete technology, Reef mats provide the same weight, density and deployment efficiency as standard subsea protection systems. They offer added weight and stabilisation, impact protection from dropped objects and gear interaction, and proven durability in high-energy environments. Reef mats stand apart through their Nature-Inclusive Design (NID) and 3D-printed surface textures that promote marine life colonisation.

Reef mats use steel-wire reinforcement instead of polypropylene rope (with further sustainable alternatives in development) and avoid plastics entirely, including in their coatings. Their ecologically informed surface structure encourages the growth and sheltering of local species such as fish, crustaceans, corals and kelp, delivering consistent, repeatable ecological performance at scale.

The result is reliable subsea asset protection and long-term biodiversity net gain across offshore wind, oil and gas and marine civil projects.