Shaft Tube, Sea Chest & Exhaust Trunk Coatings
Professional Florida Yacht Through-Hull Coating Services
Through-hull structures are some of the hardest-working components on any vessel. Constant exposure to water flow, heat, vibration, and salt contamination makes areas like shaft tubes, sea chests, and exhaust trunks highly vulnerable to coating failure and corrosion.
At Coastal Tank, we provide specialized cleaning, surface preparation, and coating services designed to protect these critical spaces and preserve the integrity of your vessel’s steel or aluminum structures. Our team works directly with captains, chief engineers, and shipyards to ensure through-hull systems remain clean, accessible, and properly protected for long-term performance.
Why Through-Hull Coatings Matter
When coatings begin to break down, corrosion can quickly follow — leading to expensive repairs, reduced efficiency, and delays during inspections or class surveys. These areas are often difficult to access and easy to overlook until problems arise.
Routine inspection and maintenance of through-hull components helps:
- Prevent corrosion and substrate damage
- Extend the lifespan of critical vessel systems
- Reduce repair costs during haul-outs
- Improve inspection readiness for class surveys
- Maintain vessel safety and performance
Through-hull maintenance is preventative maintenance — addressing minor coating damage early helps avoid major structural repairs later.
Components We Service
- Sea Chests
- Propeller Shaft Tubes
- Rudder Shaft Tubes
- Exhaust Trunks
- Bypass Exhaust Pipes
- Overboard Discharge Pipes
Our Through-Hull Coating Process
Proper coating performance starts with proper preparation. Our process focuses on delivering clean, inspectable surfaces and long-lasting adhesion:
High-Pressure Steam Cleaning
We remove salts, contaminants, loose coating, and surface corrosion using high-pressure steam cleaning methods to prepare the area for inspection and repairs.
Detailed Inspection & Assessment
Once cleaned, our team evaluates coating condition, identifies exposed substrate, and determines the proper repair or recoating approach.
Surface Preparation
Depending on coating condition, preparation may include mechanical tooling abrasive blasting to ensure surface is ready for optimal bonding.
Professional Coating Application
As a certified applicator for Belzona products, our technicians are trained in proper handling, mixing, and application methods. Coating systems may include:
- Ceramic-filled epoxies
- High-temperature ceramic coatings
- 100% solids epoxy coatings
These systems are chosen specifically for high-wear, high-heat, and corrosion-prone environments commonly found in through-hull spaces.
Professional Florida Yacht Through-hull Coating
See our Clean Coat Protect Maintain (CCPM) Program page to learn more about how we can help you stay one step ahead of your ABS or Lloyds Inspector on your next 5-year survey.