Material · Tough resin · SLA

Tough resin — high-elongation SLA for snap-fits and hinges.

SLA resin formulated for high elongation (50%+) and recovery. Makes snap-fits that actually snap without breaking, living hinges that survive hundreds of cycles, and flexible prototypes that survive real use. Tensile strength moderate (33 MPa), but toughness metrics are 2–3× standard resin.

QUICK SPECS

Tensile strength33 MPa

Elongation at break51%

Flexural modulus800 MPa

Heat deflection temp49 °C

Notched impact70 J/m

Fatigue (cyclic flex)1,000+ cycles typical for hinges

STATUSIN OPERATION

§ 01 / WHAT

What "tough" means in SLA

Standard SLA resins are strong (tensile 65+ MPa) but brittle — they fail suddenly at low elongation (6%). Tough resin trades absolute strength for ductility. The result is parts that deform before failing, survive repeat flexing, and handle impact without shattering.

For engineering prototypes, this tradeoff is usually correct. A part that fails gradually gives you debugging time; a brittle part fails catastrophically.

§ 02 / BEST

Best applications

Snap-fit prototypes50%+ elongation means snap features flex without cracking on first insertion.

Living hingesThin-section hinges (0.5–1 mm) survive hundreds of open/close cycles.

Drop-test prototypesImpact-resistant — survives typical consumer product drop testing.

Flexible gasketsThin wall sections behave slightly rubber-like. Not a silicone replacement but good for static seals.

Over-molded insertsSLA insert that will be overmolded with TPE — Tough resin bonds better than standard.

READY WHEN YOU ARE

SLA parts that don't snap on first flex.

Specify Tough resin on your STL upload — perfect for snap-fits, hinges, and impact-resistant prototypes.

Start a quote →