Sailing SV Delosvideo
We’re NOT Painting Our Boat (And Here’s Why) 🧐 Aluminum Catamaran Build Pt. 56
February 6, 2026 · 36 min · 354K views
Crew applies Nyalic to aluminum hull at sunset
What this video covers
The crew of an aluminum catamaran build opts against traditional marine paint for the hull, citing high costs, extensive surface preparation, and long-term maintenance concerns.0:51 Painting an aluminum vessel requires fairing the metal to hide welding imperfections, a process estimated to cost between $100,000 and $150,000 AUD and requiring at least three months of labor.16:45 The team notes that paint systems are prone to flaking and oxidation at sharp edges or deck fittings where moisture intrusion occurs.1:08 Instead, they apply Nyalic, a clear polymer coating that protects the raw aluminum from oxidation and streaking without requiring the extensive fairing needed for a glossy finish.12:11 To manage rainwater runoff and prevent hull streaking, they installed solid toe rails that channel water to the aft.11:41 While the exterior remains unpainted, the crew paints the engine room bilges to prevent galvanic corrosion from stray tools or stainless steel components.7:40 The project also includes installing tempered glass salon windows and completing AC and DC wiring runs.2:51
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