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​How To Seal An Aluminum Boat



An aluminum boat is a clean, effective way to enjoy the open water. But the quality of your aluminum is obvious to anyone looking at it—especially if there’s an issue. That’s why you’ll have to know how to seal an aluminum boat by using the right techniques and a few helpful products along the way.


The first step is to make sure you have the full context for what your boat needs. Aluminum is constructed with seams and rivets, which may be prone to leaking if they get loose. If you’re aware of a leak but aren’t sure about its source, get the boat dry and watch for any leaks, paying special attention to the areas of seams and rivets. These are your primary suspects for leaks that you may need to seal.

That doesn’t mean, however, that every leak will start at these sources. Make sure to give your entire boat a look-over and double-check before proceeding.

Prep The Area

What happens when you’ve identified a leak? It’s time to prepare the area. Use a dedicated Aluminum Boat Cleaner to ensure that you get the highest quality of clean while also protecting the metal itself. Give the area enough time to dry out so that you can work with a smooth, clean surface without any interference from lingering water.

Sealing Your Boat

With the aluminum adequately prepared, you’re ready to move on to the next step: sealing. Here’s what you’ll need to know:

  • Choose the right sealant for your boat material. When working directly with aluminum, you’ll want a sealant specifically designed to adhere to metal. At the very least, the label should let you know that the sealant adheres to metals. For example, a cartridge of Life-Calk will seal to metals, and the acid-free formula of Silicone Rubber Sealant won’t corrode metal. Stick with the Silicone Rubber Sealant to ensure that your metal is well protected. After all, you want to get the full life from your boat.
  • Apply the sealant, and don’t be afraid to be generous. It’s better to over-seal than under-seal, as you can always go back over the area you’ve sealed and scrape off excess sealant. If you under-seal, however, you may find yourself having to start all over. In some cases, that may mean you have to remove the old sealant, although some products will be able to adhere to themselves. Make sure you always read the label to understand which product you’re working with. A few seconds of reading the label could spare you hours of manual labor.

Follow the directions of your boat sealant to ensure a proper cure. This often requires keeping the boat in a stable place to cure overnight. After that, you should inspect the seal and test to see if it’s waterproof.

Need for more aluminum boat care products to help sustain your boating lifestyle? Keep browsing everything available here at BoatLIFE. 

Life Industries Corporation
4060 Bridge View Drive
N. Charleston, SC 29405
United States of America

toll free: (800) 382-9706
local: (843) 566-1225
fax: (843) 566-1275


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