3Dresyn IM-SF-WS, soft / flexible and water swellable for printing very soft water swellable sacrificial injection molds

Product description

3Dresyn® IM-SF-WS is a very soft and flexible water-swellable sacrificial mold-making photopolymer developed for the fabrication of highly deformable sacrificial injection molds requiring extreme flexibility and easy removal by swelling.

Application framework

Designed for use in vat photopolymerization systems (SLA, DLP and LCD) within controlled professional environments. Suitable for the fabrication of soft, flexible and water-swellable sacrificial molds for complex geometries and delicate removal conditions.

Typical applications

• Soft and flexible sacrificial injection molds
• Molds for complex geometries requiring deformation during removal
• Applications requiring swelling-assisted mold extraction
• Auxiliary sacrificial tooling for delicate or intricate parts
• Low-stress molding workflows

Measured mechanical properties

• Shore hardness: A20 (ISO 868)
• Tensile and flexural strength: <1 MPa (ISO 527 / ISO 178)
• Young’s modulus: <5 MPa (ISO 527)
• Elongation: >90% (ISO 527)
• Viscosity: <100 mPas at 23°C ± 2°C (ISO 3219)
  

Functional performance characteristics

• Very soft and highly flexible behavior
• Fast swelling in water for easy mold removal
• Tack-free finishes after light box post-curing
• High resolution once tuned to printer specifications and workflow
• Very low shrinkage

Processing and handling performance

• Printable with most commercial and professional SLA, DLP and LCD 3D printers
• Supplied in clear, cyan, magenta, yellow, black and white colors
• Cyan, magenta, yellow and especially black provide higher resolution than clear and white
• Improved swelling performance is achieved with low light power printers, such as standard LCD printers
• Fast printability even with low power LCD printers
• Increased durability of the resin tank
• Metal- and organo-tin free formulation
• Clean prints with water
• Clean and post-cure 3D prints with Cleaning Fluid WS1 Bio
• Level of printing difficulty: medium

Processing note

Swelling-based removal behavior depends on curing conditions, geometry and exposure energy. Higher curing energy may reduce swelling efficiency and increase removal time.

Testing & processing disclaimer

Material performance depends on printer type, exposure conditions, geometry and swelling conditions. Full workflow validation is required for each specific application.

Why choose 3Dresyn® IM-SF-WS

• Ultra-soft and flexible sacrificial mold material
• Water-swellable removal mechanism for complex geometries
• High elongation enabling deformation-based extraction
• Very low shrinkage and high dimensional accuracy
• Compatible with low power and standard SLA/DLP/LCD printers
• Metal- and organo-tin free formulation

Regulatory & legal notice

This material is supplied as a professional manufacturing material and is not marketed as a finished product. Final molding performance, swelling behavior and process validation remain the responsibility of the user depending on printer, geometry and workflow conditions.

Document reference: TDS-IM-SF-WS-EN | Version: 1.0 | Last updated: March 2026