BASF Forward AM Ultracur3D ST 1400: High-Toughness Engineering Resin (1 kg)
Overview: The Ultracur3D ST 1400 from Forward AM (BASF) is an engineering resin from the Tough lineup that bridges the gap between rigid and flexible materials. According to the Forward AM datasheet, it delivers outstanding toughness and impact resistance, with 43% elongation at break, 45 MPa tensile strength, and 78 Shore D hardness. Its low viscosity enables fast printing. Compatible with LCD (including MSLA) and DLP printers. Clear color, 1 kg bottle.
Key Specs at a Glance
-
Type: High-toughness engineering resin (Ultracur3D Tough lineup).
-
Toughness: 43% elongation at break and 43 J/m notched Izod impact strength.
-
Strength: 45 MPa tensile strength and 80 MPa flexural strength.
-
Stiffness: 1,900 MPa Young's modulus.
-
Hardness: 78 Shore D.
-
Water absorption: Only 0.33%.
-
Skin contact: Tested to ISO 10993-10 (Forward AM).
-
Technology: LCD (including MSLA) and DLP. Clear color.
What Parts Is It Good For?
Ideal for functional parts that need to absorb impacts and flex without breaking: housings, clips, snap-fit connectors, living hinges, and prototypes that will see real-world testing. Forward AM recommends it for enclosures and functional prototyping, as well as consumer products with skin contact such as wearables.
The Best of Both Worlds: Rigid and Flexible
Rigid resins are strong but brittle, while flexible resins absorb impacts but struggle to hold their shape. The ST 1400 combines the strengths of both: its 1,900 MPa modulus keeps parts dimensionally stable, while 43% elongation at break means they deform significantly before failing. On top of that, its water absorption of just 0.33% helps parts retain their mechanical properties over time.
Technical Specifications
Data sourced from the official Forward AM (BASF) datasheet and product catalog.
| Property |
Value |
Standard |
| Young's Modulus |
1,900 MPa |
ASTM D638 |
| Tensile Strength |
45 MPa |
ASTM D638 |
| Elongation at Break |
43% |
ASTM D638 |
| Flexural Modulus |
1,540 MPa |
ASTM D790 |
| Flexural Strength |
80 MPa |
ASTM D790 |
| Notched Izod Impact |
43 J/m |
ASTM D256 |
| Hardness |
78 Shore D |
ASTM D2240 |
| HDT at 0.45 MPa / 1.8 MPa |
57 °C / 48.7 °C |
ASTM D648 |
| Water Absorption |
0.33% |
ASTM D570 |
| Skin Contact |
ISO 10993-10 |
|
| UV Stability |
ISO 4892-2A |
|
| Technology / Color |
LCD (incl. MSLA) and DLP / clear |
|
| Contents |
1 kg |
|
Workflow
-
Printing: Low-viscosity resin designed for fast printing. Forward AM publishes validated printer-specific workflows (exposure, washing, and post-curing settings) — check the one 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 the Forward AM workflow for your printer to achieve the properties listed in the table.
A wash and cure station makes the process much easier. Check out its stiffer counterpart, the BASF Ultracur3D ST 45, and browse more options in our tough resins collection.
FAQ – BASF Ultracur3D ST 1400
What is the Ultracur3D ST 1400?
An engineering-grade resin from Forward AM's (BASF) Tough line, sitting between rigid and flexible materials.
Is it highly impact resistant?
Yes. Forward AM highlights its toughness and impact resistance: 43% elongation at break and 43 J/m notched Izod impact strength.
What parts is it suited for?
Enclosures, clips, snap-fit connections, functional prototypes, and wearables.
Is it safe for skin contact?
Forward AM has tested it in accordance with ISO 10993-10 for skin irritation and sensitization. It is not intended for oral use or implants.
Which printers is it compatible with?
LCD (including MSLA) and DLP printers. Forward AM publishes validated workflows for a wide range of printer models.
How do you wash it?
Use an ultrasonic cleaner with isopropyl alcohol or the Ultracur3D Cleaner.
How do you post-cure it?
Under UV light, following the Forward AM workflow for your specific printer.
How heat resistant is it?
Its HDT is 57 °C at 0.45 MPa and 48.7 °C at 1.8 MPa.
Does it absorb moisture?
Very little — just 0.33% according to the technical datasheet.
What's the difference between the ST 1400 and the ST 45?
The ST 1400 is tougher (43% elongation vs. 25%); the ST 45 is stiffer and stronger (2,300 MPa modulus and 60 MPa tensile strength) and offers better heat resistance.
