Pyrex® (Borosilicate) Glass Filamet™

Print real borosilicate glass parts using any open-architecture FFF/FDM 3D printer—achieving chemical resistance, thermal stability, and custom geometries in Pyrex® glass previously impossible without specialized glassblowing or expensive tooling. With 69–72% borosilicate glass content, Filamet™ Pyrex® prints like PLA and sinters to real glass.

Available Formats:
Spools: 1.75mm and 2.85mm diameters in 0.5kg and 1kg weights
Pellets: 1kg jars

Filament Density:
1.45g/cc – 1.55g/cc

Glass Content:
69.0% – 72.0% borosilicate glass

High Compatibility:
Works with virtually any open-architecture 3D printer—no proprietary hardware or specialized equipment required. Also compatible with 3D printing pens.

👉 Our list of Trusted 3D Printers – Click Here

Easy Printing Experience:

• Print with a 0.8mm hardened steel, standard flow nozzle

• Prints similar to PLA

• Minimal to no warping

• Ensure the filament feeds straight into the extruder

• Less hygroscopic than PLA

  • Do not dry this filament—drying will degrade the binder

👉 More information on printing – Click Here

Fully Sinterable:
After printing, your part can be fired in a furnace to become real glass.

⚠️ Important: Parts produced with this product will not sinter optically clear.

👉 Debind and Sinter instructions – Click Here

Applications:

• Custom laboratory glassware and chemical-resistant vessels

• Chemical-resistant fluid-handling components and fittings

• Optical and photonic research components

• High-temperature glass components for research equipment

• Jigging apparatus for shape memory alloy development

• Ceramic prototyping requiring chemical inertness

• University and R&D research programs

• One-off and short-run manufacturing

• Reducing or eliminating tooling and machining costs

Additional Links:

👉 SDS and TDS – Click Here
👉 Research Papers – Click Here

Explore More Ceramic Filaments:

• Aluminum Oxide Filamet™

• Silicon Carbide Filamet™

• Zirconium Silicate (Zircopax®) Filamet™

All print just like PLA on most open-architecture 3D printers.

Recycle empty spools with the spool buy-back program – Click Here

Working on a laboratory, chemical processing, or materials research program?
We supply university labs, chemical companies, R&D facilities, and materials research programs with borosilicate glass filament for chemically inert and thermally stable applications. Email [email protected] for volume pricing and program inquiries. We respond within 1 business day.

Large orders may be subject to longer lead times. Contact us for more accurate lead times.

FAQ:

❓ Can I print this on my printer?
✅ Filamet™ is compatible with nearly all FFF/FDM based 3D printers on the market. Switch out the nozzle for a 0.8mm hardened steel nozzle and get printing! The list of printers that have been used and the ones that are not compatible can be found here: https://thevirtualfoundry.com/trusted-printers/

❓ What density will my sintered part be?
✅ Sintered Pyrex® Filamet™ parts will be 90-95% dense.

❓ Can I handle my part in the brown state?
✅ Pyrex® parts specifically, can not be handled in their brown state as they will not be able to stay together. It is recommended to use a support box during sintering to maintain the shape of the part.

❓ Will my sintered part be optically clear?
✅ No. Parts produced with Pyrex® Filamet™ will not sinter optically clear.

❓ How strong are parts right off the printer?
✅ They are quite a bit stronger than you may expect. You can throw them around a little and handle them just fine. Generally, they will not handle load nearly as well as the base PLA would on its own.