Formlabs Grey Pro Resin is a photopolymer material formulated specifically for Stereolithography (SLA) 3D printing. Optimized for use in Formlabs’ 3D printers, the material consists of a proprietary blend of photopolymer resins, photoinitiators, and other additives to provide a balance of mechanical properties and surface finish.

Physical Properties

  • Density: Generally around 1.1–1.2 g/cm³
  • Tensile Strength: Typically falls within the range of 50-65 MPa, depending on post-curing
  • Heat Deflection Temperature: Usually sits between 70-85°C after proper post-curing

Aesthetic Quality

Formlabs Grey Pro Resin produces prints with a smooth, high-quality surface finish, delivered in a neutral grey color. This makes it suitable for both functional and display pieces, and the material is especially adept at capturing fine details.

Durability and Usage

Designed for versatility, Grey Pro Resin offers good mechanical properties that make it suitable for a wide range of applications, including functional prototyping, concept models, and manufacturing tools. Its balanced attributes make it a popular choice for industries like consumer goods, healthcare, and engineering, where prototypes and end-use parts often require a combination of strength, accuracy, and aesthetic quality.


Post-processing usually involves washing the print in a solvent such as isopropyl alcohol to remove uncured resin, followed by UV curing to enhance mechanical properties. The material is receptive to sanding, drilling, and painting, and generally adheres well to commonly used adhesives and coatings.

Environmental Impact

Like most photopolymer resins, Formlabs Grey Pro Resin is not biodegradable and should be handled and disposed of responsibly to minimize its environmental impact. Derived from non-renewable resources, it is less eco-friendly compared to bio-based materials like PLA.

In summary, Formlabs Grey Pro Resin offers a well-balanced, versatile material that is well-suited for a wide range of SLA 3D printing applications. While it may not be the most eco-friendly material, its blend of mechanical strength, accuracy, and aesthetic qualities make it a valuable asset for both prototyping and production across multiple industries. Responsible handling and disposal are essential due to its environmental considerations.

Formlabs Grey Pro – Technical Data Sheet