FLX-300 Elastomer Resin Now Available

Hey 3D Printing Pal,

If you've printed with elastomer resins before, you know what happens. They start soft and rubber-like, then gradually turn rigid over weeks or months. It makes them useless for anything you need to actually work long-term.

We built FLX-300 to fix this. Our internal testing ran for three months (both in darkness and direct sunlight), and the parts showed zero degradation in flexibility or hardness. FLX-300 doesn't compromise. It stays soft and compressible, which means you can finally use it for real engineering applications: gaskets and seals, vibration dampers, soft robotics, functional prototypes, and custom-fit cushioning parts.

Technical Specifications

• Maintains Properties Over Time – Three months of testing with zero measurable degradation in softness and compressibility.

• Shore A 44 Hardness – Silicone-like softness with maximum compressibility. True rubber-like feel.

• Compression Set: 1.7% (25°C) | 3.5% (70°C) – Outstanding shape recovery after repeated compression cycles. Your gaskets, seals, and dampers will keep working reliably.

• Elongation at Break: 232.3% – Stretches like rubber without tearing.

• Tear Resistance: 6.4 kN/m – Durable enough for functional prototypes and production applications.

• Minimal Shrinkage | Non-Tacky Surface | Low Water Absorption (0.79%) – Accurate geometry, professional finish, stays dimensionally stable.

• Compatible with Standard Printers – Works with Anycubic, Phrozen, Elegoo, Asiga and similar MSLA/DLP printers.

• Applications: Gaskets and seals • Vibration dampers • Soft robotics • Functional prototypes • Custom-fit cushioning parts.

Download the full technical data sheet here.

FLX-300 is now available at the AmeraLabs shop, coming soon to Amazon US and UK, and our authorized resellers.

Questions about your specific application? Contact our team at [email protected]

Happy printing!

Andrius & The AmeraLabs Team