FAQ

A quality gelcoat guarantees a uniform aesthetic finish and a protective barrier against chemical, atmospheric agents, and humidity.
Poly3 gelcoats, thanks also to the combination with polyester resins, stand out for their resistance and reliability on fiberglass surfaces.

To achieve effective polymerization, we recommend adding between 1.5% and 2% of catalyst relative to the weight of the gelcoat.
For optimal results, we recommend using Polymek 50, specially created to guarantee uniform reaction and safety of use.

Gelcoat drying times may vary depending on ambient temperature and humidity. Poly3 gelcoat takes approximately 24-36 hours to dry completely. After curing, it can be polished manually or mechanically with abrasive paste to achieve a smooth, shiny finish.

Gelcoat can be applied by spraying, rolling, or brushing. Spraying is preferred for even thickness distribution, while in small or difficult-to-access areas, roller application can be an effective alternative. It's important to cure only the amount of gelcoat needed for the application before the gelling process begins (about 20 minutes).

Polyester gelcoat is more economical and easier to apply, suitable for standard jobs. Vinyl ester gelcoat, on the other hand, guarantees higher resistance to chemicals and mechanical stress, and is ideal for more aggressive environments or long-term applications. Furthermore, it is more expensive and requires a more complex application.
Poly3 offers both solutions to meet different needs.

Poly3 mold gelcoat provides a smooth and precise finish for fiberglass molds, essential for obtaining quality final products. It is applied as the first layer inside the mold, followed by layers of resin and glass fibers.

The recommended thickness for effective application of Poly3 polyester gelcoat varies based on use: it is usually between 0.4 mm and 0.6 mm, but can be up to 1 mm for higher protection. It is important not to exceed this thickness to avoid problems with gelation and adhesion.

The performance of Poly3 polyester gelcoat per square meter depends on the thickness and application method. On average, approximately 1 kg of gelcoat/m2 is required. However, the actual performance depends on the application method (spray, brush, roller), the viscosity of the product, and the environmental conditions. A thicker application will require larger quantities.

In many cases, yes, but it's always essential to verify their specific compatibility with the type of epoxy resin used. Coloring pastes, especially those with a non-reactive carrier, can also be used with other thermosetting resins, including epoxies.

The layering phases in the creation of a fiberglass product include:

• Preparation of the mold, with cleaning and application of the release agent.
• Application of the gelcoat, which acts as an aesthetic and protective layer.
• Spreading of glass fibers and resin, in successive layers.
• Elimination of bubbles with rollers to ensure uniform adhesion.
• Polymerization, leaving the manufact harden in a controlled environment.
• Finishing

Polyester resin Poly3 is ideal for those looking for an economical, easy-to-use product. It is perfect for large surfaces and processes where drying speed and cost are determining factors. Epoxy resin, on the other hand, offers higher resistance and durability for more sophisticated technical applications.