How To Clean Your Fibreglass Boat

CLR is great for cleaning calcium, limescale, rust, salt, mineral deposits, oxidation, algae and fibreglass/gel coat yellowing from boat surfaces and components. Clean your boat ladder, cleats, cup holders, and connector flanges. A clean hull can help reduce drag by providing a smooth surface so that your boat can move more easily through the water. CLR Calcium Limescale & Rust Remover can also ensure you boat’s fibreglass body looks clean and smooth.

Get Started
Clean Your Fibreglass Boat

Before you get started, always use gloves and check if CLR is suitable to be applied on the material you are trying to clean. Test the CLR on an inconspicuous spot first before applying to entire surface.

Step 01

Fill a bucket or container with 1 part CLR Calcium Limescale & Rust Remover to 1 part water.

Step 02

Apply solution onto the surface or component of the boat with a sponge or cloth.

Step 03

Let solution sit for 2 minutes, then scrub area to agitate the build up.

Step 04

Rinse thoroughly with clean water (pressure washer, hose, or bucket).


Stubborn stains may require another cleaning with neat CLR. Repeat the process for no more than 2 minutes at a time, until CLR Calcium Limescale & Rust Remover has effectively dissolved the build-up.