Sealing Leaky Rivets on an Aluminum Boat: Comprehensive Guide
When it comes to maintaining an aluminum boat, one common issue that can arise is leaky rivets. This article will explore how to properly seal and repair these rivets using various methods and products.
Understanding and Identifying Leaky Rivets
The term leaky rivets can be misleading. It could mean that the rivets have worked loose, become corroded, or are simply not providing a watertight seal. Before proceeding with any repair, it's essential to inspect the rivets thoroughly.
Tightening Loose Rivets and Preventing Further Issues
The first step in addressing leaky rivets is to ensure the rivets are properly tightened. Using a rivet gun or hammer, you can tighten loose rivets. It is important to use the correct technique and not to over-tighten, as this can damage the rivets or surrounding material.
If tightened rivets do not solve the issue or if the rivets appear corroded, you may need to remove them and re-rivet them. This process involves using a suitable rivet setter and hammer, or a pneumatic rivet gun hammer with a bucking bar. Having a helper is essential for this task.
Applying a Protective Coating
Once the rivets have been properly tightened, the next step is to apply a protective coating. Products such as Dektred, a rubberized non-skid coating, may be used to help seal the rivets. However, this product is a temporary fix and may not provide a long-lasting solution on its own.
Shark Hide: A Double Protection Solution?
Another effective product is Shark Hide, which is designed to coat aluminum after polishing and preserve its finish. I have personally used this on various aluminum surfaces with excellent results. Applying a coat of Shark Hide can provide additional protection, but it is important to ensure the surface is clean and properly prepped before application.
Permanent Repair Options
If the leaky rivets are a recurring issue, you may need to consider more permanent solutions. Unfortunately, sealing from the outside can be challenging as the material expands and contracts with temperature changes, disrupting the seal. Here are a few alternative methods:
Adhesives and Sealants
For temporary fixes, you can use sealants such as 3M 5200 or 4200 polyurethane sealers. For a more robust solution, you might consider splash zone epoxy, although it requires a meticulous application process and is not easily done by roller. It is best applied by troweling on a thick and flexible coat.
Re-riveting with Silicone
Another option is to replace the rivets with a silicone-drop seal. This involves first sealing the rivet holes with silicone and then setting new rivets. This requires precision and can be time-consuming but offers a reliable solution for watertight repairs.
Conclusion
The most comprehensive approach is to restrike the rivets using a pneumatic rivet hammer and an assistant with a bucking bar. This process, while more labor-intensive, can ensure a watertight seal. If you don't have the necessary tools and expertise, it may be best to consult a professional boat repair service.
Regardless of the method you choose, regular maintenance and inspection of your aluminum boat are crucial for longevity and safety. Remember, the real goal is to ensure the integrity of your boat and prevent leaky rivets from becoming a recurring and expensive issue.