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Breedon Nautilus® is a high‑performance underwater concrete mix designed to maintain strength, stability, and cohesion during placement below the waterline.
Using specialist anti‑washout technology, it delivers reliable performance for marine and civil engineering projects where structural integrity and environmental protection are essential.
Get in touch about Underwater Concrete
Breedon Nautilus® is a specialist concrete mix designed for reliable placement in submerged and tidal environments. When conventional concretes risk washout or material loss, Breedon Nautilus maintains its cohesion, ensuring both structural integrity and long-term durability beneath the waterline.
Formulated with an advanced anti‑washout admixture, Breedon Nautilus® reduces the risk of cement particles dispersing on contact with water. This improves consistency, reduces environmental disturbance, and ensures the concrete remains intact during placement, even in challenging conditions where dewatering is impractical or unsafe.
Suitable for a wide range of marine and civil engineering applications, Breedon Nautilus® is typically designed using CEM I to support effective setting. However, alternative cement types can be accommodated depending on project requirements. Setting time and water movement should be considered, and our technical team is available to provide tailored advice and support.
Engineered for underwater use
Anti-washout properties reduce cement loss to provide long-term durability and strength.
Protect marine ecosystems
Anti-washout additives prevent cement fines from dispersing into the water, helping to preserve surrounding aquatic life.
High strength and stability
Proven to maintain performance even in flowing and tidal conditions.
Versatile placement
Suitable for placement via tremie method and pump delivery. Breedon Nautilus® can be delivered on site with bagged options which can be used for small-scale and precision applications.
Breedon Nautilus® can be used on any project where there is a requirement for concrete to be placed underwater, including:
Please contact the team to discuss your specific project requirements and application.
Available in all strength classes
Rapid setting times
Improved cohesion underwater
Strong anti-washout of cement properties
Underwater concretes, such as Breedon Nautilus®, are specially designed to be placed directly into water.
Breedon Nautilus contains an anti-washout admixture that keeps the mix stable, cohesive, and resistant to dilution. This ensures it sets correctly and maintains long-term strength and durability even when fully underwater.
Specialist underwater concretes, such as Breedon Nautilus®, need to be placed using controlled methods such as tremie pipes or pumping. This reduces the risk of segregation and limits water contamination.
The advanced formulation prevents the loss of cement paste, helping the concrete stay cohesive and achieve a strong, reliable bond even when placed below water.
Breedon Nautilus® is suitable for a wide range of marine and hydraulic structures including bridge piers, docks, underwater foundations, dams, ports and sea walls - anywhere concrete needs to be placed below the waterline.
Contact the team to discuss your specific project requirements and they'll be happy to assist.
Our ready-mix concrete is normally delivered in an 8-wheeler mixer truck that typically carries 7.5m3 of concrete and has a gross weight of 32t. For hard-to-access areas or smaller loads our Breedon Minimix service may be suitable.
We also offer a collection service from specific plants. Please contact us for more information and locations.
Our team of technical experts are available to support with finding the right concrete solution for your project requirements. Please get in touch for further support.
