Marine hull patch repair involves fixing damaged ship hulls using temporary or permanent patches to restore structural integrity.

Underwater ship repair is performed by divers or ROVs to address hull damage without dry-docking, saving time and costs.

Both methods ensure vessel safety and operational continuity by addressing cracks, holes, or corrosion underwater.

Size: Typically available in sheets or rolls ranging from 1m x 1m to 3m x 5m, customizable as per repair requirements.

Grade: High-strength, corrosion-resistant materials compliant with marine standards (e.g., ASTM, ISO).

Viscosity: Low to medium viscosity adhesives (500–5,000 cP) for easy underwater application and bonding.

Buoyancy: Neutral to slightly negative buoyancy to ensure stability during underwater application.

Material: Composite layers of reinforced fiberglass, polyurethane, or epoxy resins with hydrophobic coatings.

Curing Time: 10–60 minutes (fast-curing variants) to 2–24 hours (standard), depending on water temperature.

Operating Depth: Suitable for depths up to 50 meters (standard), with specialized variants for deeper repairs.

Temperature Range: -20°C to +80°C for application and service conditions.

Tensile Strength: 20–50 MPa (depending on composite material used).

Adhesion Strength: ≥5 MPa on steel, aluminum, or fiberglass hull surfaces.

Chemical Resistance: Resistant to saltwater, oils, and mild acids/alkalis.