Sealants, Adhesives and Insulating

Sealants, Adhesives, and Insulation: The Watertight Difference

From sealing through-hull fittings to securing deck hardware, choosing the right sealant or adhesive is crucial. An unsuitable product can fail due to saltwater, vibrations, and temperature fluctuations, leading to leaks and structural damage. We offer only products from official suppliers, with clear technical data sheets and detailed instructions.

Marine-Grade Silicone: UV and saltwater resistant, ideal for portholes, hatches, and plumbing connections. Neutral-cure silicones won't corrode metals and are also suitable for aluminum applications.

Structural Adhesives: For strong and durable bonds. Two-part epoxy adhesives are perfect for structural repairs and bonding fiberglass, wood, and metal. Adebond cyanoacrylate adhesive is suitable for quick, small repairs.

Butyl Sealing Tapes: For a watertight and flexible seal. Ideal for application on irregular surfaces and for sealing joints and fittings. PSP Marine Tapes butyl tape guarantees a perfect seal even in extreme conditions.

Nautica Basile's Expert Tip

• Prepare Surfaces Properly: Thoroughly clean and degrease surfaces before applying sealant or adhesive.


• Choose the Right Product: Consult the technical data sheets and instructions to choose the product best suited to your needs.


• Apply Carefully: Follow the manufacturer's instructions to apply the sealant or adhesive evenly and without air bubbles.


• Don't Skimp: It's better to use a little extra than to end up with leaks.


• Check Compatibility: Some sealants may react with certain plastics. Always test in an inconspicuous area first.

FAQ - Frequently Asked Questions

What type of silicone should I use for a through-hull fitting?

For through-hull fittings, it is advisable to use a neutral-cure silicone that is resistant to seawater and UV rays. Avoid acetic silicones, which can corrode metals. A polyurethane silicone, such as those offered by 3M, is an excellent solution.

How do I remove old silicone?

To remove old silicone, you can use a plastic scraper or a silicone-specific solvent. Soften the silicone with the solvent and then gently scrape it away. Avoid using metal objects that could scratch the surface.

Can I use Duralac to isolate dissimilar metals?

Absolutely. Duralac is a protective paste that prevents galvanic corrosion between dissimilar metals. It is ideal for isolating stainless steel bolts on aluminum, for example.

The sealant I used shrank and cracked. What did I do wrong?

You probably used a low-quality sealant or one that was not suitable for the application. Make sure you use a sealant specifically for marine use that is resistant to UV rays and temperature fluctuations. Also, make sure the surfaces were clean and dry before application.

What type of silicone should I use for a through-hull fitting?

For through-hull fittings, it is advisable to use a neutral-cure silicone that is resistant to seawater and UV rays. Avoid acetic silicones, which can corrode metals. A polyurethane silicone, such as those offered by 3M, is an excellent solution.

How do I remove old silicone?

To remove old silicone, you can use a plastic scraper or a silicone-specific solvent. Soften the silicone with the solvent and then gently scrape it away. Avoid using metal objects that could scratch the surface.

Can I use Duralac to isolate dissimilar metals?

Absolutely. Duralac is a protective paste that prevents galvanic corrosion between dissimilar metals. It is ideal for isolating stainless steel bolts on aluminum, for example.

The sealant I used shrank and cracked. What did I do wrong?

You probably used a low-quality sealant or one that was not suitable for the application. Make sure you use a sealant specifically for marine use that is resistant to UV rays and temperature fluctuations. Also, make sure the surfaces were clean and dry before application.