How to remove barnacles from boat

How to Remove Barnacles From Boat

How to remove barnacles from boat? If you’re a boat owner, you know how important it is to keep your vessel in good condition. One of the biggest challenges of owning a boat is dealing with barnacles – those stubborn, crustacean-like creatures that attach themselves to the hull and can cause damage over time. If left unchecked, barnacles can reduce your boat’s speed, damage the paint and even corrode the hull.

Do You Pressure Wash?


Good old-fashioned elbow grease is the best way to remove barnacles off your boat. While pressure washers may seem like a faster and easier solution for older barnacles, they won’t be as effective at getting rid of smaller ones. Plus, using them could damage your boat’s gel coat and risk its stability; we suggest using them only if giant barnacles cover large areas on its hull. We advise against pressure washing small or young barnacles without using good elbow grease.

Pressure-washing barnacles from the hull is a good idea. Spray parallel to the hull’s surface to avoid making gouges in fiberglass; this can be accomplished easily with a delicate spray at high tension.

Scraping the Hull Surface

For smaller barnacles or patches left behind from pressure washing, using a scraper and some elbow grease is safer. If they are difficult to remove, protect the hull with either plastic or wooden scrapers for easier access. Slide the scraper under your shell’s edge to remove barnacles while scraping parallel.

Once the barnacle shells have been removed, a calcium-based residue known as a husk may remain. To eliminate this material buildup, chemical methods will need to be employed.

Mild Chemical Treatments

Mild boat cleaners usually contain either calcium or lime remover to break up barnacle residue, which can be applied with a nylon brush. Allow the chemicals to sit before washing your vessel, then gently scrape away any leftover chemicals with your brush.

You may need to apply mild boat cleaner multiple times to eradicate any barnacles or husks completely.

Chemical Barnacle Removal for Heavy-Duty Missions

Muriatic acid, a highly corrosive chemical that can pose risks to both boats and the environment, has been classified as a corrosive hazard.

Muriatic acid, a concentrated form of acid, can be used.

Hydrochloric acid can wreak havoc on your eyes, skin, and lungs. It also damages paint, gel coat, and metal on boats – and may dissolve the trailer too!

Professionals should only utilize this type of acid as a hull cleaner.

Final Touches

Once you remove all the barnacles in your boat, you can polish your hull and re-paint it.

Once all barnacles have been removed, use a polisher and wool pad to apply rubbing compound to remove scratches and oxidation. For an elegant, glossy look on your hull, polish and wax it for protection.

If the holes in your boat hull are more profound than expected, you must fill them with resin. After that, use sandpaper to lightly sand the surface before applying paint again.

Safety Considerations

Rubber gloves are recommended when removing barnacles to protect yourself from sharp shells cutting into your skin. Eye protection is also necessary to shield the eyes from scratches or damage caused by small fragments of shells.

Use chemicals only if you have read their instructions and safety warnings. Be mindful that many of these products and bottom paint may be toxic to marine life.

When working with muriatic acids, wear a full or face mask, respirator, and plastic sheets to cover your boat’s truck.

Before beginning, dilute any acid to the recommended level.

To minimize acidic spillage, keep plenty of water close by.

If uncertain, seek expert advice or hire a professional to complete the task.

When cleaning barnacles and other debris from the bottom of your boat, use Personal Protective Equipment (PPE).

Preventing Barnacle Infestations

Barnacles are marine animals that attach themselves to the hull of boats, creating several problems for boat owners. Not only do they create drag and slow the ship down, but they also damage the paint and can even corrode the hull. Preventing barnacle infestations on boats is essential to maintaining the boat’s performance and value. Here are some tips to help you avoid infestations of barnacle on your boat:

    1. Keep your boat clean and well-maintained: Barnacles are attracted to rough surfaces and organic matter that collects on the hull. Regularly cleaning your boat with a soft brush or sponge and a mild detergent will help prevent the buildup of organic matter and discourage barnacle growth.

    1. Use antifouling paint: Antifouling paint is designed to prevent the growth of marine organisms, including barnacles. When applied correctly, it can provide adequate protection for several years. However, it’s essential to choose the right type of antifouling paint for your boat and to apply it according to the manufacturer’s instructions.

    1. Use zinc anodes: Zinc anodes are sacrificial metal plates attached to the boat’s hull. They work by corroding instead of the boat’s metal, reducing the barnacle growth risk. Zinc anodes need to be replaced periodically, so it’s essential to keep an eye on them and replace them when necessary.

    1. Avoid stagnant water: Barnacles are more likely to grow in stagnant water. If possible, avoid leaving your boat in the water for extended periods, especially in areas with low water flow.

    1. Use copper tape: Copper tape is a relatively new product that can help prevent barnacle growth. It releases copper ions into the water, which are toxic to barnacles. Copper tape can be applied to the boat’s hull or areas where barnacles are likely to attach.

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Keep your boat in top condition and prevent barnacle growth with Beach to Bay Divers and Pools! Our expert team provides professional barnacle removal services to help keep your boat’s hull clean and smooth, reducing drag and improving performance. Contact us today to schedule your barnacle removal service.

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