Rigid 4000 Resin is a glass-filled SLA resin that offers similar stiffness to PEEK and PEKK thermoplastics. It holds the highest tensile strength in Formlabs' Engineering Resin Library, with a tensile modulus of 4.1 GPa and an ultimate tensile strength of 69 MPa. Parts print with a smooth, matte finish and are highly resistant to heat and chemicals.

Rigid 4000 Resin is designed to simulate the stiffness of high-performance thermoplastics like PEEK and PEKK. It is resistant to deformation under a variety of forces, pressures, and torques, making it one of the stiffest options in the Formlabs Engineering Resin Library.

Rigid 4000 Resin has a heat deflection temperature of 60 °C at 1.8 MPa and 77 °C at 0.45 MPa, along with a thermal expansion coefficient of 63 μm/m/°C. It is well suited for engineering environments where parts must retain their shape under elevated temperatures.

The complete material properties and handling information are available in the Rigid 4000 Resin Technical Data Sheet, which can be downloaded directly from the Formlabs website.

Rigid 4000 Resin is ideal for stiff, strong engineering-grade prototypes and industrial parts that must withstand significant loads without bending. Common applications include mounts, brackets, jigs, fixtures, thin-walled parts, and prototypes that simulate the stiffness of PEEK.

Yes. Rigid 4000 Resin is categorized for both rapid prototyping and end-use parts. Its combination of high stiffness, thermal resistance, and a smooth, matte finish means parts look and feel like a finished product straight from the printer.

Rigid 4000 Resin is compatible with a wide range of Formlabs SLA printers, including Form 4, Form 4B, Form 4L, Form 4BL, Form 3, Form 3L, Form 3B, Form 3BL, and Form 2.

Yes. Post-curing is essential for Engineering and Specialty Resins like Rigid 4000. This step completes the chemical reaction initiated during printing and transforms the part from its green state into a fully finished component with full strength and functionality.

Post-processing involves two main steps. First, wash the part using isopropyl alcohol or an ether-based solution to remove uncured resin from the surface. Formlabs Form Wash or Form Wash L are both compatible. Second, post-cure the part using a Form Cure or Form Cure L unit. Post-curing is essential for parts to achieve their full strength and intended functional properties by completing the chemical reaction initiated during printing.

Wash time settings are available on the Formlabs support site for Form Wash and Form Wash L. Cure settings are available separately for Form Cure V1, Form Cure V2, Form Cure L V1, and Form Cure L V2.

Formlabs offers a 3D printed Rigid 4000 Resin sample part shipped directly to your office so you can see and feel the material quality firsthand. You can request a sample part on the Formlabs website. For pricing and bulk order options, visit the product page or contact the Formlabs sales team.