Marine propulsion system protection and rebuilding

Marine propulsion systems vary depending on the vessel type, but all are susceptible to cavitation damage. Belzona provides a range of metal rebuilding and resurfacing solutions—such as Belzona 1111 (Super Metal), Belzona 1311 (Ceramic R-Metal), and Belzona 1321 (Ceramic S-Metal)—to restore lost substrate and rebuild damaged components.

To protect against future attack, components like kort nozzles, jet tubes, and propellers can be coated with erosion, corrosion, and cavitation-resistant materials including Belzona 1341 (Supermetalglide) and Belzona 2141 (ACR-Fluid Elastomer), ensuring long-term performance and efficiency.

In-situ shaft repair

Shafts operate under high mechanical loads, making them prone to wear and damage over time. Belzona’s metal rebuilding materials such as Belzona 1111 (Super Metal) and Belzona 1311 (Ceramic R-Metal) enable effective in-situ repairs, minimising downtime and avoiding costly disassembly.

For long-term protection, durable corrosion-resistant coatings like Belzona 1321 (Ceramic S-Metal) and Belzona 1341 (Supermetalglide) safeguard tail shafts against erosive and corrosive attack, extending service life and improving reliability.

Engine repair

Marine engines commonly experience issues such as cracked casings and cooling inefficiencies, with cavitation and corrosion frequently affecting cylinder blocks and liners. These problems can be effectively addressed using Belzona’s high-performance repair composites such as Belzona 1111 (Super Metal) and Belzona 1511 (Super HT-Metal) to restore damaged areas.

For enhanced protection, high-temperature resistant coatings like Belzona 1321 (Ceramic S-Metal) and Belzona 1391T provide excellent resistance to corrosion, erosion, and thermal stress, helping to extend engine life and maintain operational efficiency.

Shimming and chocking

Precise alignment and anchorage of heavy ship propulsion systems, auxiliary machinery and other heavy equipment can be achieved using the chocking, backing and leveling compound Belzona 7111 (Marine Grade).

Belzona 7111 (Marine Grade) is designed to withstand the physical and thermal stresses common in marine environments. Its pourable formulation allows it to flow easily and level across irregular surfaces, ensuring precise equipment alignment. The material offers excellent resistance to pressure, impact, and vibration, while also dampening noise and preventing the loosening of threaded bolts. With high load-bearing capacity and no requirement for heat or special tools, it enables faster and more efficient installation.

Belzona 7111 (Marine Grade) is widely used across marine applications including propulsion and auxiliary machinery, pumps, compressors, generators, reduction gears, stern tube and strut bearings, rudder systems, crane rails, and deck equipment such as winches and bow thrusters.

Repair and sealing of rubber components

Rubber components commonly used in the marine industry—such as fenders, buoys, bellows, and hoses—are prone to in-service deterioration, where even minor rips or tears can result in equipment being taken out of operation. Belzona elastomer systems, such as Belzona 2111 (D&A Hi-Build Elastomer) , are cold-applied, flexible polyurethanes that effectively restore damaged rubber surfaces. These materials provide durable, long-lasting repairs, allowing equipment to be returned to service quickly, with minimal downtime and at a significantly lower cost compared to replacement.

Marine Emergency Repair Kit for the rapid and simple repair of marine equipment

Due to limited resources off-shore and the need for emergency repair and maintenance of essential vessel equipment, Belzona has developed a Marine Emergency Repair Kit that contains all of the necessary items needed for temporary and permanent repair of equipment such as pipes, engines, shafts and hydraulic rams.

The Belzona fast curing and extended working life polymeric repair materials included in the kit are suitable for use in all climates and application situations. These materials are easy to apply with the spatula or applicator provided in the kit, no specialists tools required. Belzona’s Marine Emergency Repair Kit provides a versatile, safe and simple repair solution to unplanned maintenance needs at sea.

Storage tank repair and protection

Belzona provides effective solutions for a wide range of storage tank issues, from emergency leak sealing on wet or oil-contaminated surfaces to long-term protection against chemical attack and corrosion. Products such as Belzona 1212 enable rapid repairs in challenging conditions, while Belzona 1321 (Ceramic S-Metal) can be used to rebuild and protect damaged areas subject to erosion and corrosion. For immersion service and more demanding chemical environments, coatings such as Belzona 5811 (Immersion Grade) and Belzona 5892 offer excellent chemical resistance and potable water approvals. Together, these systems restore tank integrity, extend service life, and provide reliable long-term protection in harsh operating conditions.