AmeraLabs, a European resin maker, has addressed a persistent issue with flexible 3D resins: they tend to harden over weeks or months. Their new material, FLX-300, promises to retain elasticity far longer than conventional options. The company claims the resin shows “no measurable change” even after three months of aging, tells Tom’s Hardware.
One key advantage of FLX-300 is its extremely low compression set, meaning printed parts can deform and bounce back repeatedly without losing shape. AmeraLabs positions it not just as a novelty but as a functional material suitable for seals, gaskets, vibration dampers, and other demanding applications.
The resin is priced at roughly USD 140 for a 1 kg bottle (around €120). That’s notably higher than their standard TGM-7 resin (about USD 89), but AmeraLabs argues the performance gain justifies the premium. For now, it’s available only in black. It’s compatible with a broad range of MSLA and DLP printers (e.g., Anycubic, Prusa, Elegoo), though the company cautions against using PDMS-based trays; FLX-300 reacts with silicone.
Print guidelines include heating the resin to at least 25°C before use, using slower lift speeds, and limiting exposure to solvents (no more than 30 minutes in IPA). Because of its higher viscosity, workflow tweaks may be needed. After UV post-curing, printed surfaces have a silicone-like feel and cure to a non-tacky finish.
FLX-300 also resists water absorption, maintaining dimensional stability in humid environments. That adds robustness for real-world use. AmeraLabs expects the resin to enable new applications, moving elastic 3D printing from toys and novelty parts toward serious engineering components.