ABS, Lloyd's, DNV Approved | No Hot Work | Crew-Applied
Marine Repair and Protection
Classification society-approved repair composites for hulls, decks, rudders, and machinery. Cold-applied solutions that eliminate hot work permits and reduce drydock time.
The Challenge
Marine environments are brutal on equipment. Saltwater corrosion, cavitation erosion, galvanic attack, and impact damage steadily degrade hulls, decks, rudders, and machinery. Every day in drydock costs money — and traditional welding repairs require hot work permits, fire watches, certified welders, and extensive safety protocols.
On corroded or thin plate, welding carries significant risks: distortion, burn-through, and the need for extensive pre-heat in cold weather. For vessels on tight schedules, these delays translate directly to lost revenue.
Pacific Northwest shipyards and vessel operators need repair solutions that work fast, meet classification standards, and hold up in the harshest marine conditions.
The Belzona Solution
Belzona marine repair composites are approved by all major classification societies including ABS, Lloyd's Register, Bureau Veritas, and DNV. These cold-applied materials require no hot work, no welding permits, and no fire watches — and can be applied by your own crew with basic training.
For deck and hull corrosion, Belzona paste-grade composites rebuild corroded steel to original profile with 4,350 psi adhesion — no risk of distortion or burn-through. Some Belzona products even cure underwater for emergency repairs.
Belzona Technology Northwest provides product selection, application training, and technical support for shipyards and vessel operators throughout Washington, Oregon, Alaska, and Northern Idaho.
Vessel Types We Serve
Belzona products are trusted across the maritime industry — including but not limited to:
Commercial Fishing
Trawlers, seiners, crabbers, longliners, processors, tenders
Tugboats and Barges
Harbor tugs, ocean tugs, ATBs, deck barges, tank barges
Cargo and Container
Container ships, bulk carriers, tankers, RoRo vessels
Workboats and Crew Boats
Pilot boats, crew transfer, offshore supply, research vessels
Navy and Coast Guard
Surface combatants, cutters, support vessels, patrol boats
Yachts and Pleasure Craft
Motor yachts, sailboats, sportfishing boats, charter vessels
Have a different vessel type? Call us at (425) 610-4902 — we have solutions for virtually any marine application.
Problems We Solve
Common failure modes that cost you drydock time and vessel availability — and more:
Deck Corrosion and Metal Loss
Pitting and general wastage thin deck plate over time. Rebuild to original profile without welding or risk of burn-through.
Hull Pitting and Wastage
Saltwater corrosion creates pits and thins hull plating. Cold-applied composites restore plate thickness for class approval.
Rudder and Propeller Erosion
Cavitation and erosion damage steering and propulsion components. Rebuild and protect with ceramic-reinforced composites.
Sea Chest and Strainer Attack
Impingement corrosion degrades sea chests and cooling water intakes. Protective linings extend service life significantly.
Ballast Tank Corrosion
Wet/dry cycling accelerates corrosion in ballast tanks. Immersion-grade coatings provide long-term protection.
Stern Tube and Bearing Wear
Worn bearing housings and stern tubes cause vibration and seal failure. Rebuild to original tolerances in place.
Why Boat Owners Choose Belzona Over Welding
For deck corrosion and hull metal loss repairs, Belzona paste-grade composites offer significant advantages over traditional welding.
| Consideration | Traditional Welding | Belzona 1111 Repair |
|---|---|---|
| Hot Work Permit | Required | Not required |
| Fire Watch | Required (during + 30 min after) | Not required |
| Certified Welder | Required | Crew-applied with training |
| Distortion Risk (Thin Plate) | High | None |
| Burn-Through Risk (Corroded Plate) | High | None — builds up safely |
| Cold Weather Application | Requires pre-heat | Applies at 41°F+ |
| Pull-Off Adhesion (ASTM D4541) | Fusion bond | 4,350 psi |
| Compressive Strength (ASTM D695) | Steel baseline | 12,800 psi |
| Salt Spray Protection (ASTM B117) | Depends on coating | 5,000 hours |
| Classification Society Approved | ✓ | ✓ |
Test data from Belzona 1111 product specification sheet (FN10229). Underwater-curing products also available for specific applications.
Hot Work Permits
0
required for Belzona repairs
Salt Spray Protection
5,000 hrs
corrosion resistance
Drydock Time Saved
2-3 days
typical for hull/deck repairs
Products for Marine Repair
Classification society-approved composites and coatings for hull repair, machinery rebuilding, tank lining, and corrosion protection.
Belzona 1111 (Super Metal)
Multi-purpose paste-grade composite for hull and deck rebuilding, machinery bases, and general metal repair. Machinable after cure. ABS approved.
Belzona 1121 (Super XL-Metal)
High-build repair paste for bearing housings, stern tubes, pintles, and bush seats. Excellent dimensional stability for large area rebuilding.
Belzona 1311 (Ceramic R-Metal)
Ceramic-reinforced composite for propeller and rudder rebuilding. Excellent erosion and cavitation resistance.
Belzona 1321 (Ceramic S-Metal)
Solvent-free ceramic coating for continuous seawater immersion. Ideal for sea chests, strainers, and underwater fittings.
Belzona 1341 (Supermetalglide)
Ultra-smooth erosion-resistant coating. Surface 15x smoother than polished stainless. Reduces drag on propellers and hulls.
Belzona 2141 (ACR-Fluid Elastomer)
Flexible elastomer for cavitation protection on propellers, rudders, and high-turbulence areas. Absorbs impact energy.
Belzona 5811 (Immersion Grade)
Two-coat epoxy system for ballast tanks, bilges, and cargo holds. ABS approved. Excellent chemical and abrasion resistance.
Belzona 7111 (Chocking Epoxy)
Precision alignment compound for engine and machinery mounting. Eliminates metal shims and provides vibration damping.
Need help selecting the right product? Call (425) 610-4902
Case Study
Tugboat Hull Repair — Seattle Shipyard
A Seattle-based tugboat operator discovered significant corrosion and pitting on the hull during a scheduled drydock inspection. Traditional welding repairs would extend the drydock stay by several days and require hot work permits, fire watches, and a certified welder — costly delays for a vessel needed back in service.
The shipyard chose Belzona 1111 (Super Metal) to rebuild the corroded hull sections. After surface preparation, the paste-grade composite was applied to restore the hull profile to original specifications. The cold-applied repair required no welding, no hot work permits, and no fire watches.
- +Drydock stay reduced by 3 days
- +No hot work permits or fire watches required
- +Classification society approved repair
- +Vessel returned to service ahead of schedule
Project Details
- Vessel TypeHarbor Tugboat
- ApplicationHull corrosion and pitting repair
- Products UsedBelzona 1111 (Super Metal)
- Drydock Time Saved3 days
- LocationSeattle, WA
Shipyards We Support
Belzona Technology Northwest provides product supply and technical support to shipyards throughout the Pacific Northwest and Alaska, including:
Vigor Industrial
Foss Maritime
Nichols Brothers
Seward Shipyard Facility
Dakota Creek Industries
JAG Alaska
Everett Ship Repair
Puget Sound Naval Shipyard
Don't see your shipyard? We support marine repair operations of all sizes throughout Washington, Oregon, Alaska, and Northern Idaho.
Frequently Asked Questions
Will classification surveyors approve Belzona repairs?
Yes. Belzona products hold type approvals from all major classification societies including ABS, Lloyd's Register, Bureau Veritas, DNV, and others. We can provide certification documentation for surveyor review.
Can Belzona be applied underwater?
Yes. Specific Belzona products are designed to cure underwater or on wet surfaces for emergency repairs. Contact us to discuss underwater application requirements for your situation.
Can our crew apply Belzona or do we need specialists?
Your crew can apply Belzona with basic training. We provide application training and technical support to ensure successful repairs. Many vessel operators keep Belzona products onboard for emergency repairs.
How long does a hull repair take to cure?
Cure times vary by product and temperature. At typical ambient temperatures, most repairs can be returned to service within 24 hours. We can help plan repairs to fit your drydock schedule.
Do you support Alaska fishing vessels?
Yes. We have a dedicated technical consultant based in Alaska and support commercial fishing operations throughout the state. We understand the tight turnaround requirements of fishing seasons.
Classification Society Approvals
Approved By
Additional Acknowledgments
- +U.S. Navy acknowledged
- +U.S. Coast Guard acknowledged
- +ISO 9001 certified manufacturing
- +Full technical documentation available
Marine Applications
Hull and Structure
- +Hull plate repair
- +Deck corrosion rebuilding
- +Bulkhead repair
- +Tank lining
- +Bilge protection
Propulsion and Steering
- +Propeller rebuilding
- +Rudder repair
- +Stern tube rebuilding
- +Bow thruster protection
- +Shaft seal seats
Machinery and Systems
- +Engine alignment
- +Pump rebuilding
- +Sea chest lining
- +Heat exchanger repair
- +Valve rebuilding
Need Marine Repair Products?
Describe your repair challenge and we will recommend the right Belzona products for your vessel. Technical support for shipyards and vessel operators throughout Washington, Oregon, Alaska, and Northern Idaho.
Belzona Technology Northwest is the exclusive authorized Belzona distributor for Washington, Oregon, Alaska, and Northern Idaho. Product sales, technical support, and application training for shipyards and marine operators throughout the Pacific Northwest.