NA1 Natural Transparent
BK1 Black
WH1 White
BU2 Dark Blue
RD1 Red

Flex 45

Flex 45 is a very flexible rubber replacing filament for 3D printing. The combination of flexibility, mechanical strength, durability and good resistance to chemicals and extreme temperatures makes it a unique filament. This BIO performance Thermoplastic Co-Polyester has a high carbon content of renewable materials resulting in a less environmental impact. Finally, FLEX 45 exhibits excellent UV resistance.


  • Very flexible
  • Strong
  • Long term heat resistant
  • Good chemical resistance
  • UV resistant
Size ø Tolerance Roundness
1,75mm ø 0,05mm 95%
2,85mm ø 0,10mm 95%
Description Test method Typical value
Specific gravity ISO 1183 1,14 g/cc
MFI 260ºC/5 kg ISO 1133 52 g/10 min
Tensile strength at break ISO 527 24 MPa
Elongation strain at break ISO 527 530%
Tensile (E) modulus ISO 527 95 MPa
Impact strength - Charpy notched 23˚C ISO 179 1eA N.B.
Shore hardness ISO 868 45D
Melting temp. ISO 11357 180°C
Vicat softening temp. ISO 306 B50 38°C
Description Test method Typical value
printing temp. Internal method 250±10˚C


FLEX 45 is available in nearly any type of packaging and labelling. Ask our team to help you customizing your product.

Additional information

Recommended temperature for heated bed is ≥100°C. Various other options (also without heated bed) are possible depending on the type and size of the object to be printed.

FLEX 45 can be printed better at a lower speed, due to its flexibility.

FLEX 45 can be used on most common desktop FDM or FFF technology 3D printers.


Cool and dry (15-25˚C) and away from UV light. This enhances the shelf life significantly.