Gelcoat for boats: how to choose it?

In the nautical sector, where sun, salt, and atmospheric agents put materials to the test, it is essential to choose the right type of nautical gelcoat to ensure high performance and long-lasting durability. In this article, we explore the characteristics to evaluate and why you should rely on technical advanced solutions designed for the marine environment.

Why is gelcoat essential in the nautical sector?

Gelcoat is a special compound based on polyester (or vinylester) resin, enriched with pigments and additives, used as a protective and decorative surface layer in fiberglass products. Applied as a final coating, it creates a barrier against:

• UV rays
• Moisture and salt
• Chemical and corrosive agents
• Mechanical abrasion

For this reason, it represents the first line of defense for any boat, yacht, dinghy, kayak, or marine component made of composite materials.

How to choose gelcoat for boats?

Choosing the right gelcoat for boats depends on various factors, including the type of vessel, its intended use, and the environment in which it operates. Here are the main characteristics to consider:

1. Chemical composition
   • Isophthalic gelcoat: ideal for protecting hulls and surfaces exposed to constant contact with water, thanks to its resistance to osmosis and mechanical wear.
   • Iso-neopentyl gelcoat: combines excellent chemical resistance and a glossy finish, perfect for roofs and external components subject to strong exposure to the sun.
    
2. Resistance to the marine environment A good nautical gelcoat must guarantee:
   • Color stability over time
   • Resistance to scratches and impacts
   • Excellent adhesion to the fiberglass substrate
    
3. Application and maintenance
   • It is important to choose a gelcoat that is compatible with the intended application methods: spray, brush or roller. Ease of maintenance and repair in the event of impacts or flaking is also an aspect to consider.

Where is nautical gelcoat applied?

There are many applications for gelcoat for boats:

• Hulls and bottoms: protection against osmosis and abrasion.
• Coverings and decks: aesthetic and non-slip finish.
• Interior components: consoles, tanks, seats and composite panels.
• Lightweight boats: canoes, surfboards, kayaks.

The Poly 3 offer for nautical use

For over 35 years, Poly 3 has been developing customized advanced solutions for the composite materials sector. For the nautical world, it offers a dedicated line for the protection, finishing and repair of hulls, covers and marine accessories.
Available products:

• Gelcoat
• Bonding pastes and Bonder
• Coloring pastes
• Technical resins

These materials are ideal for the construction, maintenance and aesthetic and functional restoration of all fiberglass parts of the boat.

Conclusions

Choosing the right gelcoat for boats means investing in the protection, beauty and durability of your nautical vessel. Relying on industry experts like Poly3 allows you to have access to a complete range of high-performance products, designed for the marine environment and customizable according to project needs. Discover our nautical line now and best protect your boat with Poly3 professional gelcoats.

Find out more about Poly 3 products for nautical use