F424 Polyaspartic Ester Resin: Fast Cure and Outstanding Durability

F424 polyaspartic ester resin is a difunctional cycloaliphatic polyaspartic resin and a high-performance raw material for polyaspartic polyurea systems. It appears as a clear liquid with a slight yellow to light yellow tint and a color value of ≤400 Hazen (Pt-Co), reflecting consistent purity and stable quality. When used with isocyanate hardeners, F424 is well suited for formulating fast-curing polyaspartic coatings, adhesives, and related materials. It offers an excellent balance of hardness and flexibility, helping finished systems achieve strong mechanical performance without becoming brittle.

What Makes F424 Polyaspartic Resin Stand Out?

1. Low viscosity for easier application
With a viscosity of 400–700 mPa·s at 25°C, F424 falls within the low-viscosity range, making it especially well suited for solvent-free coatings and adhesives. It provides excellent flow and workability during application, whether by brush or spray, helping reduce common issues such as sagging and uneven film build. Its solvent-free nature also supports lower VOC emissions and aligns well with the growing demand for more sustainable building materials. With a solid content of ≥99.0% (105°C, 2h), F424 contains virtually no volatile solvent, allowing applicators to achieve the desired film thickness more efficiently in a single coat.
2. Fast cure with a longer pot life
F424 is designed for fast-curing systems, helping shorten turnaround times and improve application efficiency. At the same time, it offers a longer pot life than F420, giving applicators greater flexibility during mixing and application without the material setting too quickly. This improves handling and makes the system easier to process on site. From a chemical performance standpoint, F424 has an amine value of 160–175 mg KOH/g, an NH equivalent of 333 g/mol, and an equivalent hydroxyl content of 5.10%. This balanced functional design helps deliver a more controlled curing reaction, combining fast dry times with a practical application window.
3. Built for weatherability and demanding outdoor use
F424 helps coatings deliver the durability needed to protect structures in demanding outdoor and industrial environments. When formulated with isocyanate hardeners, it can be used to produce polyaspartic polyurea coatings with excellent weather resistance, including strong UV resistance and long-term durability under outdoor exposure. Even in harsh sunlight, coatings based on F424 are less likely to chalk or crack over time. They also offer strong resistance to acids, alkalis, and a wide range of chemicals, helping protect substrates reliably in industrial environments. In addition, F424 has a moisture content of ≤0.1% and a relative density of 1.02 ± 0.02 at 25°C. Its very low moisture level helps minimize application defects such as bubbling and blushing, while its stable density contributes to consistent batch-to-batch quality.
4. A strong balance of toughness and flexibility
As a polyaspartic resin with a cyclohexyl structure, F424 offers an attractive combination of mechanical properties. It delivers high tensile strength, allowing the coating to withstand tensile and mechanical stress without failing easily. At the same time, it provides excellent flexibility, enabling the coating to move with the substrate under slight deformation or vibration rather than becoming brittle, cracking, or delaminating.

Key Technical Data of F424 Polyaspartic Resin

What Can F424 Polyaspartic Resin Be Used For?

F424 is a core base resin for formulating polyaspartic polyurea coatings and adhesives, with applications across a wide range of industries.

• In industrial anti-corrosion systems, it is used for protective coatings on steel structures, pipelines, and storage tanks, where resistance to acids, alkalis, and salt spray is essential.
• In flooring applications, F424 is well suited for wear-resistant floors in factories, workshops, and parking areas, offering strong resistance to traffic, abrasion, and scratching.
• In waterproofing projects, it can be used in coatings for roofs, basements, and tunnels, providing long-term water resistance and reliable leak protection.
• In aggregate bonding applications, such as permeable pavements and slope protection, it can be formulated into stone binders that combine high strength with excellent weather resistance.
• In weather-resistant topcoat applications, it is also an excellent choice for formulating polyaspartic finishes that help outdoor structures and exterior walls maintain a durable, attractive appearance over time.

Feiyang has been specializing in the production of raw materials for polyaspartic coatings for 30 years and can provide polyaspartic resins, hardeners and coating formulations. Feel free to contact us: marketing@feiyang.com.cn

Feiyang Products List

• Polyaspartic Resin
• Isocyanate Hardener
• Epoxy Hardener

Polyaspartic Coating Formulation Showcase Cases - Consult our engineers to customize a coating formulation for your project. Contact our Tech Team

Feiyang Protech Corp., Ltd. specializes in researching and producing polyaspartic polyurea resin and other new chemical products. We are recognized as a "National Special New Key Little Giant" and a "State-level High-tech Enterprise", with more than 50 polyaspartic polyurea invention patents. We also participated in the preparation of 13 industry standards for polyaspartic polyurea materials as a leading company in this field, ranking No.1 in the Chinese market.

In the coating industry, polyaspartic polyurea is used in construction machinery, automobile, containers, fan blades, marine heavy corrosion protection, and high-end industrial and commercial floor coatings. In the adhesive field, it is mainly used in sealants, stone adhesives, electronic adhesives, film circuit packaging adhesives, and other high-end applications. In the waterproofing materials sector, it is primarily used in hydroelectric dams, water parks, building waterproofing repair materials, and other areas. In the structural materials field, it is applied to curling tracks, artificial ice skating rinks, and other structural materials.

Polyaspartic polyurea is considered a high-end new material in the strategy of manufacturing power. We have broken the foreign technology monopoly and filled the domestic market gap. Due to its comprehensive characteristics of "Environmental protection, Energy saving, and Long durability", polyaspartic polyurea can contribute to the realization of genuine carbon neutrality in the coatings, adhesives, and materials industries.

Since 2012, Feiyang polyaspartic ester resin has been supplied overseas. It has been widely used to replace Bayer's current polyaspartic system in many coating companies and has been applied in anti-corrosion and waterproofing by international coating companies.