Avoiding Gelcoat Yellowing

Why Does Gelcoat Turn Yellow?

Exposure to UV rays, pollution, algae-laden waters, or certain chemicals can cause your boat’s white gelcoat to discolor. On /r/boating, many boaters seek solutions for removing stubborn yellow hues. Regular cleaning, along with protective wax or sealants, can prevent deeper staining and help maintain that bright, fresh hull appearance.

How Does Someone Combat Yellowing?

• Specialized Hull Cleaners: Use cleaners containing oxalic acid or gentle abrasives to break down stains. Be sure to rinse thoroughly to avoid residue buildup.
• UV Protection: After cleaning, apply a UV-blocking wax or marine sealant to protect the surface and slow future yellowing.
• Prevent Exposure: Avoid leaving the hull in tannin-rich waters for extended periods as they can contribute to yellowing.
• Inspect for Damage: Check for small cracks or pinholes where discolored residues may become trapped, making yellowing harder to remove.

Restoring a Crisp Look

Scenario: A day cruiser docked in a brackish bay developed a yellow waterline. The owner used an acid-based cleaner, scrubbing gently with a soft brush. After sealing with a high-quality wax, the hull regained its white sheen and stayed that way longer between cleanings.

Bright Hull – Deck

Ban the yellow tint! Deck’s proven cleaning steps keep your gelcoat shining like new, maintaining that pristine look with minimal effort.

White and Bright!

Restore your boat’s gleam—Deck’s solutions conquer discoloration and protect your hull from further damage.