What materials are compatible with SLA 3D printing?
- SLA uses liquid photopolymers cured by a laser.
- Common resins: standard, tough, flexible, heat-resistant, and dental/castable.
- SLA excels at fine detail and smooth surfaces, not high impact strength.
SLA (Stereolithography) 3D printing uses liquid photopolymer resins cured by a UV laser. Compatible materials include standard resins for general use, tough and durable resins, flexible resins, heat-resistant resins, and specialized dental or castable resins.
SLA is valued for fine detail, smooth surfaces, and tight features that FDM cannot match, but photopolymers are generally more brittle than thermoplastics and less suited to high-impact or high-temperature use. Choose SLA when appearance and precision matter more than toughness.
Frequently asked questions
Is SLA stronger than FDM?
Not usually — FDM thermoplastics like ABS/PC are tougher; SLA wins on detail and surface finish.
Are SLA parts waterproof?
Most are, but post-cure and coating improve long-term water and UV resistance.
When should I avoid SLA?
For mechanically loaded or outdoor parts where toughness and UV stability matter.