How to Clean Mold and Mildew Spots off of an Injection Molded Plastic Kayak

Having a kayak adventure is always exciting, but dealing with mold and mildew on your kayak isn’t. Mold and mildew can not only make your kayak look dirty, but they can also make it slippery and unsafe. If you’ve noticed those yucky spots on your injection molded plastic kayak, don’t worry. Getting rid of them is easier than you might think.

In this article, we'll show you how to clean mold and mildew off your kayak and share some tips to keep them from coming back. Cleaning your kayak properly will make your trips on the water more enjoyable and keep your kayak in good shape for longer. Let's dive in and get your kayak sparkling clean again.

Gathering Your Cleaning Supplies

To get started on cleaning your kayak, you'll need a few basic supplies. First, grab a bucket and fill it with warm water. You'll also need a mild detergent, like WavesRx EpicWash or dish soap. Avoid using harsh chemicals, as these can damage the plastic and harm the environment. Vinegar is also a great natural cleaner that can help tackle mold and mildew.

You'll need a soft brush or sponge to scrub away the mildew without scratching your kayak. Have a few clean cloths or towels on hand to dry it off later. If the mold spots are tough to remove, consider a soft-bristled toothbrush for scrubbing small areas. Don’t forget to wear gloves to protect your hands while cleaning. Once you have all your supplies ready, you can start cleaning your kayak.

Step-by-Step Cleaning Guide

Cleaning your kayak is simple if you follow a few steps. Start by rinsing your kayak with fresh water to remove any loose dirt and debris. This will make it easier to see where the mold and mildew are. Next, mix some detergent or vinegar with warm water in your bucket. Dip your brush or sponge into the soapy water and start scrubbing the affected areas.

Work in small sections, scrubbing gently to avoid scratching the plastic. Use the soft-bristled toothbrush for any tough spots. Once you’ve scrubbed all the mold and mildew away, rinse your kayak thoroughly with clean water to remove any soap residue. Make sure all the cleaning solution is gone, as leftover soap can cause new mold to form.

After rinsing, dry your kayak completely with clean towels. Leaving your kayak wet can lead to more mildew growth. Pay extra attention to any small or hidden areas where water can collect. Once your kayak is dry, it will be clean and ready for your next adventure on the water. Proper cleaning helps keep your kayak in good shape and makes your trips more enjoyable.

Preventing Mold and Mildew in the Future

Keeping mold and mildew away from your kayak involves a few simple steps. First, always rinse your kayak with fresh water after each use. Saltwater and lake water can promote mildew growth. After rinsing, make sure it's completely dry before storing it. Any remaining moisture can lead to mold and mildew, so wipe it down thoroughly with a towel.

Another tip is to store your kayak in a dry, well-ventilated area. Proper airflow helps prevent moisture buildup. If you store your kayak outside, keep it covered with a UV-resistant cover that also allows for air circulation. Placing your kayak in direct sunlight occasionally can also help kill any lingering spores. By following these steps, you can keep your kayak clean and mildew-free for many more adventures.

Safe Storage Tips for Your Kayak

Storing your kayak properly is crucial to maintaining its condition. When not in use, keep your kayak out of direct sunlight to prevent UV damage. UV rays can weaken the plastic over time. A garage, shed, or covered storage area is ideal. If you need to store it outside, use a quality UV-resistant cover to protect it from the elements.

Make sure to store your kayak off the ground. This prevents moisture from seeping into the plastic and causing mold or mildew. You can use wall racks, sawhorses, or specialized kayak stands to elevate it. Store your kayak upside down or on its side to prevent any deformation of the hull. It is also a good idea to occasionally check and clean the storage area to ensure it remains a dry and safe place for your kayak.


Mold and mildew can be a hassle, but with the right steps, you can keep your kayak clean and ready for every adventure. Gathering the right supplies and following a detailed cleaning process ensures that your kayak stays in great shape. Preventing future mold and mildew growth involves simple practices like drying your kayak thoroughly and storing it properly.

For more tips and high-quality marine accessories and boat cleaning products, visit WavesRx. We offer a range of products designed to enhance your boating and kayaking experience. Protect your kayak and keep it looking new with our reliable gear. Choose us for all your premium marine needs.