About Marcus Thompson

About Marcus Thompson

Remove Barnacles From A Steel Dock And Keep Its Surface Protected

by Kaylee Craig

If a steel dock has barnacles attached to its surface, learn how to remove them with the following instructions. A barnacle is a marine crustacean that has a hard shell-like covering. A group of them can cause injuries to an individual when they are entering or exiting the water if they accidentally touch or step on one. Once the barnacles have been removed, learn how to prevent them from attaching themselves to the dock in the future and how to help with dock repair.


  • water hose
  • work gloves
  • plastic putty knife
  • limescale remover
  • sponge
  • soft-bristled scrub brush
  • marine sealer (designed to assist with marine crustaceans)
  • mixing stick
  • paintbrush
  • paint tray

Remove The Barnacles

Put on a pair of work gloves to keep your hands protected from the sharp edges on each barnacle's covering. Use a water hose to moisten the dock's surface. Insert the tip of a putty knife underneath the edge of each barnacle. Move the handle back and forth to assist with loosening each one.

You may only be able to remove the hard shell-like coverings in this manner, but this will reduce the amount of work that you need to complete in the following steps. Be careful not to scrape the dock's steel surface with the putty knife because it can leave lasting marks. Dispose of all of the pieces that you have removed when finished. 

Eliminate The Remaining Pieces

If the surface of the dock still has some pieces of each barnacle attached to it, apply limescale remover to them with a sponge. Limescale remover will help loosen the pieces that remain. Use a soft-bristled scrub brush to assist with cleaning the dock. Move the brush back and forth while applying pressure to the back of it. Once all signs of the barnacles have been eliminated, rinse the dock off with a plain water. 

Protect The Dock's Surface

A marine sealer that is designed to prevent crustaceans from attaching to metal will provide the dock with protection. This type of sealer can be purchased from a marine supply retailer. Mix the sealer to eliminate air bubbles and pour it into a paint tray. Coat a paint brush with the sealer and brush it onto the dock in straight lines. Wait several hours for the sealer to dry.

In the future, the barnacles will not attach to the dock. The sealer may last for a few years and a new coat can be reapplied when needed to keep the dock's surface protected. 


About Me

About Marcus Thompson

My name is Marcus Thompson and about 8 years ago I found myself raising 3 children on my own. Before becoming a single father, I was too busy in my corporate world to even realize my home was falling apart. However, as I began spending more time at home, I began to notice all of the issues that were quickly causing my home's value to decrease. I couldn't afford to hire a contractor to fix these issues, so little by little, I began learning how to fix these problems myself. Over the years, I became a dedicated DIY enthusiast who is capable of fixing any issue I may encounter in my home. Creating this website is my way of sharing everything I have learned over the years with other parents and homeowners so that they too can begin taking control of any issues they may experience with their home.