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Jon boats are often made of aluminium, which means that sealants can flake off quickly. However, there are a number of sealants that can be used to waterproof the floor's edges next to the inside hull of a jon boat. These include 5200, Flex Glue, and regular waterproofing silicone.
| Characteristics | Values |
|---|---|
| Best sealant for outside jon boat | Flex shot, Flex glue, 2-part epoxy, polyamide epoxy, marine sealer |
| Best sealant for inside jon boat | Marine JB weld, 5200, Flex glue, regular waterproofing silicone |
| Preparation | Use acetone 5 minutes before applying any sealant |
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What You'll Learn
Flex Glue
If you are looking for a cheaper alternative to Flexsteel, you may want to consider a 2-part epoxy, such as Interlux Interprotect, followed by a polyamide epoxy, such as Rhino lining or Line-X. You should first etch the aluminium with phosphoric acid etcher.
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![[Black] 5200 Marine Sealant - Fast Cure, High Bond Strength, UV Resistant Underwater 5200 Fast Cure, Marine Adhesive Sealant for Boats, Hulls, Decks, & RVs Caulk Black with Gloves, Nozzle 10oz](https://m.media-amazon.com/images/I/71xilLZNebL._AC_UY218_.jpg)
Sanding down to bare metal
When it comes to sealing a jon boat, it's important to consider the specific areas you want to target. For instance, if you're focusing on the inside hull walls just below the floor, sanding down to bare metal might not be the best option. This is because it can create issues when trying to adhere new materials to the surface. Instead, look for sealants that adhere well to paint.
If you're sealing the outside of your jon boat, particularly the edges where the back wall and hull meet, you might consider a different approach. Sanding down to bare metal can be an effective way to prepare the surface for sealing. This process ensures that the sealant will have a strong bond with the metal, creating a durable and long-lasting finish.
Before you begin sanding, it's crucial to choose the right tools and techniques for the job. Use a suitable grit sandpaper that will effectively remove any existing paint or sealant without damaging the metal underneath. Take your time and work in small sections to achieve a smooth and consistent finish. Remember to wear appropriate protective gear, including a respirator and safety goggles, to safeguard against metal dust and debris.
Once you've completed the sanding process, it's essential to prepare the surface for sealing. Remove any dust or debris with a tack cloth or a damp cloth to ensure the surface is clean and ready for the sealant. You may also want to consider using a phosphoric acid etcher to etch the aluminium, creating an even better bond for the sealant.
After the surface is adequately prepared, you can move on to the sealing process. Choose a sealant that is specifically designed for outdoor use and aluminium surfaces. Carefully follow the instructions provided by the manufacturer for the best results. Apply the sealant evenly and smoothly, ensuring complete coverage of the sanded areas. Allow adequate curing time before exposing your jon boat to water, following the sealant's specific guidelines.
By following these steps and paying attention to the details, you can effectively seal your jon boat, ensuring a smooth and protected finish. Remember that proper preparation, including thorough sanding and surface cleaning, is key to achieving a long-lasting and high-quality seal.
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Stainless-steel bolts and nuts
Sealant can be used to waterproof the floor edges of a Jon boat. Flex Glue, regular waterproofing silicone and 5200 Flex Shot are all recommended by boat owners. Before applying any sealant, use acetone 5 minutes beforehand to get the most aggressive bond. Your sealant should also have UV resistance.
If you are looking to seal the rivets on the bottom of your Jon boat, you can use Flex Shot to seal them and then paint over them. If you can't tighten the rivets, you can replace them with new solid rivets or small stainless-steel bolts, rubber washers, and nuts + marine sealer. One user recommends small stainless-steel bolts and nuts with Loctite marine sealer, which they have used on their Jon boat with good results.
If you are looking for a cheaper alternative to Flexsteel, you may want to consider a 2-part epoxy, such as Interlux Interprotect, followed by a polyamide epoxy, such as Rhino lining or Line-X. Whatever you do, you should first etch the aluminium with phosphoric acid etcher.
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Marine JB weld
If you're looking to seal the outside of your jon boat, there are a few options available to you. You could use a regular waterproofing silicone, or a two-part epoxy such as Interlux Interprotect, followed by a polyamide epoxy like Rhino lining.
If you're looking to seal rivets, you could use flex shot, or stainless-steel bolts and nuts with loctite marine sealer.
To use MarineWeld, first clean the surface with a detergent or degreaser, then roughen the surface with a file or coarse sandpaper. After removing the replaceable cap, press down on the plunger and squeeze equal amounts onto a disposable surface, then mix thoroughly. Apply with an appropriate tool in an even coat, weld bead, or extruded shape as needed.
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Rhino lining
Before applying Rhino lining, it is important to first etch the aluminium with phosphoric acid etcher. This will help ensure a strong bond between the coating and the boat.
When applying Rhino lining, it is important to follow the manufacturer's instructions carefully. The surface of the boat should be clean, dry, and free of any contaminants that could interfere with the bonding process. Proper ventilation is also important, as the fumes from the coating can be strong.
Overall, Rhino lining is a high-quality option for sealing a jon boat. With proper preparation and application, it can provide a durable and long-lasting seal that will protect the boat from the elements.
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Frequently asked questions
You can use a 2-part epoxy, such as Interlux Interprotect, followed by a polyamide epoxy, such as Rhino lining, or Line-X. You should first etch the aluminium with phosphoric acid etcher.
You should use acetone 5 minutes before applying any sealant to get the most aggressive bond. Your sealant should also have UV resistance.
You can use Flex Glue or any regular waterproofing silicone.
