Polyaspartic Resin
Feispartic F520L
FEISPARTIC F520L is a solvent-free aminofunctional co-reactant for polyisocyanates, designed for high-solid and solvent-free 2K coating systems, including polyaspartic coatings and polyurethane topcoats. It offers low viscosity, high gloss, excellent leveling, strong adhesion and durable resistance to weathering, chemicals and abrasion.

Typical Properties
| Index | Value |
|---|---|
| Appearance | Colorless to light yellow green transparent liquid |
| Hazen (Pt-Co) | ≤100 |
| Solid Content (%) | 96±2 |
| Amine value (mg KOH/g) | 185 ~ 200 |
| Amine Equivalent (g/mol) | 290 |
| Hydroxyl value Equivalent (%) | 5.84 ~ 5.86 |
| Viscosity (mpa.s/25℃) | 700 ~ 2000 |
| Relative density (25℃) | 1.06±0.02 |
Applications
- In automotive coatings, it can significantly improve film fullness, gloss and hardness.
- For industrial and wood coatings, it is especially useful in systems that require high hardness and excellent wear resistance.
- It can be used to formulate anti-corrosion coatings for steel structures, oil pipelines and other light- to heavy-duty protective coating applications.
- It is also applicable to coatings for polystyrene foam landscape products.
- In wind turbine blade coating systems, it can be used in gel coats, putties and topcoats.
- With high solid content, low viscosity, good wetting ability and excellent compatibility, it is widely used for grinding high-concentration pigment pastes, especially in automotive refinish coatings.
Packing & Storage Information
Packing
200 Kgs/Drum, 20 Kgs/Drum
Shelf Life
FEISPARTIC F520L must be stored in airtight containers to prevent contact with moisture. Recommended storage temperature is below 40°C (≤104°F). The shelf life of FEISPARTIC F520L in the closed original container is 12 months.
Notice
- FEISPARTIC F520L is combustible and should be stored at the temperature below 40 ℃. It should be kept away from fire source and stored in a cool, dry and ventilated environment. The storage period is 12 months.
- The coating formulated with FEISPARTIC F520L should be tested for performance after one week’s maintenance.
Why Choose Feiyang Protech
In-house R&D lab
Continuous innovation and quality assurance
3 production plants
Stable supply and global service
26,000-ton annual capacity
Strong capacity to support your growth
200+ Customers in 30+ Countries
Trusted by coating manufacturers worldwide
80+ patents
Continuous innovation backed by independent intellectual property
Get In Touch
With The Feiyang Protech Team
Feiyang Protech has an in-house R&D lab since 2004 with 40 engineers, providing custom formulas and technical support. The company operates three plants with 60,000 square meters of production area, serving over 200 firms in more than 30 countries. It offers factory-direct supply with economies of scale, a 26,000-ton capacity, and over 30 years of industry experience. Feiyang Protech also holds 84 invention patents, 17 industry standards, and ECOVADIS Silver certification.
