BASF Forward AM Ultracur3D Tough ST 45 - Clear Engineering Resin 1 kg

BASF Forward AM Ultracur3D ST 45: Fast-Printing Tough Engineering Resin (1 kg)

Quick summary: The Ultracur3D ST 45 from Forward AM (BASF) is an engineering resin from the Tough line that combines high strength, toughness, and impact resistance with very fast print speeds and an excellent surface finish. According to the Forward AM datasheet, it achieves 60 MPa tensile strength, 110 MPa flexural strength, 25% elongation at break, and a deflection temperature of 73 °C. Compatible with LCD (including MSLA) and DLP printers. Clear color, 1 kg bottle.

Key Specs at a Glance

• Type: Tough engineering resin (Ultracur3D Tough line).
• Strength: 60 MPa tensile strength and 110 MPa flexural strength.
• Stiffness: 2,300 MPa Young's modulus and 2,400 MPa flexural modulus.
• Toughness: 25% elongation at break.
• Temperature resistance: HDT of 73 °C at 0.45 MPa.
• Hardness: 80 Shore D.
• Testing: UL 94 flammability (1.5 mm), skin contact per ISO 10993-5 and ISO 10993-10, and UV stability.
• Technology: LCD (including MSLA) and DLP. Clear color.

What Parts Is It Good For?

Forward AM recommends it for prototyping, custom gadgets and tools, enclosures and housings, and high-detail, textured parts. It's the go-to choice when you need parts that can handle mechanical stress and moderate heat, with a refined surface finish and short print times.

Strong, Tough, and Fast

With 60 MPa tensile strength and 110 MPa flexural strength, it ranks among the strongest resins in the Tough line, while its 25% elongation at break prevents the brittleness typical of rigid resins. Forward AM also highlights its very fast print speeds and excellent surface quality, which cut down both production and post-processing time.

Technical Specifications

Data sourced from the official Forward AM (BASF) datasheet and product catalog.

Workflow

• Printing: Forward AM publishes validated printer-specific workflows (exposure, washing, and post-curing settings); refer to these for your printer model.
• Washing: Use an ultrasonic cleaner with isopropyl alcohol or the Ultracur3D Cleaner from Forward AM.
• Post-curing: Cure under UV light following the exposure times in your printer's workflow to achieve the mechanical properties listed above.

A wash and cure station makes the process much easier. If you need even greater toughness, check out the BASF Ultracur3D ST 1400, and browse more options in our engineering resins collection.

BASF Ultracur3D ST 45 – Frequently Asked Questions

What is the Ultracur3D ST 45?
An engineering-grade resin from Forward AM's (BASF) Tough line that combines high strength, toughness, and fast print speeds.

What are its mechanical properties?
Tensile strength of 60 MPa and flexural strength of 110 MPa, with 25% elongation at break.

How heat-resistant is it?
The HDT is 73 °C at 0.45 MPa and 61 °C at 1.8 MPa.

What parts is it suited for?
Prototypes, custom gadgets and tools, enclosures, and high-detail parts with surface texture.

Is it safe for skin contact?
Forward AM has tested it to ISO 10993-5 and ISO 10993-10 for skin contact. It is not intended for oral use or implants.

Has it been tested for flammability?
Yes, it carries a UL 94 rating at 1.5 mm per the Forward AM datasheet.

Which printers is it compatible with?
LCD (including MSLA) and DLP printers. Forward AM publishes validated workflows for a wide range of models.

How do I wash prints?
Use an ultrasonic cleaner with isopropyl alcohol or the Ultracur3D Cleaner.

How do I post-cure prints?
Cure under UV light following the Forward AM workflow for your specific printer.

What's the difference between the ST 45 and the ST 1400?
The ST 45 is stiffer, stronger, and more heat-resistant; the ST 1400 is tougher (43% elongation at break) and sits between rigid and flexible.