AMT PostPro SF2X Vapor Smoothing System
Building on the global success of the PostPro SFX, the AMT PostPro SF2X Vapour Smoothing for SLS brings next-level chemical vapour smoothing performance to industrial additive manufacturing. Featuring double the process chamber volume, the SF2X enables higher throughput while delivering sealed, smooth, injection-molded finish quality without compromising safety or sustainability.
100% Watertight
Seals micro-porosities in printed parts, making them liquid- and gas-tight, washable, and resistant to bacterial growth.
Eco-friendly solvent
Operates using AMT’s proprietary, eco-friendly FA5802 processing fluid in a sealed, closed-loop cartridge system.
Dimensional Integrity
Gently smoothes surface roughness without degrading fine geometric features.
Key Features at a Glance
- Double the Chamber Volume: With a enlarged 26.4-liter process chamber (260 x 390 x 260), the SF2X doubles the capacity of the original SFX. Smooth larger individual components or significantly increase batch volume per cycle.
- Injection-Molded Surface Quality: Eliminate layer lines and seal internal cavities. The chemical vapor process creates a smooth, sealed surface that improves mechanical strength, fatigue performance, and chemical resistance while preserving critical dimensional accuracy.
- Eco-Friendly & Safe Operation: Powered by PostPro Pure (FA5802)—AMT’s proprietary, non-flammable, non-toxic, and biodegradable green solvent. The closed-loop system ensures user safety and environmentally responsible operations.
- Broad Material & Tech Compatibility: Optimized for powders and filaments across standard and engineering thermoplastics, including PA11, PA12, TPU, PP, and high-performance FDM materials like ULTEM and ONYX. Compatible with MJF, SLS, HSS, and FDM print technologies.
True end-use parts
As selective laser sintering (SLS) desktop hardware becomes more accessible, post-processing remains the bottleneck to delivering true end-use parts. Raw SLS components inherently possess surface porosity and a powdery texture that can trap contaminants or compromise fluid tightness. Implementing producation grade vapour smoothing for SLS unlocks direct end-use viability across demanding industries:
Medical & Healthcare
Unsealed SLS parts risk harboring bacteria. Vapour smoothing seals the surface matrix, yielding up to a 60% reduction in bacterial retention (such as MRSA). The result is skin-contact safe, cleanable, and sterilizable custom prosthetics, orthotics, and surgical guides.Food Production & Packaging
Porous plastics cannot pass hygiene standards. The SF2X system creates smooth, non-porous surfaces that prevent organic buildup and facilitate easy cleaning, enabling food-contact-safe prototype fixtures, nozzles, and custom machinery components.UAVs & Aerospace
Aerodynamic performance depends on smooth airflows. Vapour smoothing reduces drag on drone wings, fairings, and internal ducting while sealing parts against moisture ingress and airborne debris—all without adding weight.End-Use Manufacturing & Consumer Products
Ditch the “3D printed look.” Produce consumer electronics enclosures, automotive trim, and functional machinery parts that look, feel, and perform like mass-produced injection-moulded plastics.Ready to elevate your 3D print finishing with the SF2X?
Contact our 3D Printing team to request a quote, schedule a live demonstration, or send us your sample parts for a free benchmark smoothing test.
Find out if this machine is right for you.
How Does Vapour Smoothing Work?
Unlike abrasive finishing (such as media blasting or vibratory tumbling) which wears away material, the AMT PostPro SF2X uses a controlled chemical condensation process.
Vapor Vaporization & Circulation
The closed-loop chamber vaporizes a precise volume of AMT’s PostPro Pure solvent.
Selective Surface Melting
The solvent vapor circulates around suspended parts, briefly liquefying the outermost polymer layer on a microscopic level.
Reflow & Resealing
Surface tension causes the liquefied plastic to flow into micro-voids and valley structures.
Evaporation & Curing
Solvent vapor is safely evacuated and condensed, leaving behind a smooth, fully sealed, non-porous outer shell that preserves part geometry.
The Workflow Process
The AMT PostPro SF2X system makes vapour smoothing easy and intuitive.
Print & Clean
Print your parts on your SLS system (e.g., Formlabs Fuse Series, HP MJF, etc.) and perform standard media de-powdering.
Rack
Hang or place parts on the included processing racks to allow total 360-degree vapor exposure.
Load Cartridge & Run
Load the safe FA5802 solvent cartridge, select your pre-configured material profile via the touchscreen, and hit start.
Unload Finished Parts
Once the automated cycle completes, remove completely dry, fully sealed, finished end-use parts.
Technical Specifications
| Feature | Specification |
| System Classification | Benchtop / Desktop Automated Vapour Smoothing System |
| Process Chamber Volume | 26.4 Litres |
| Chamber Dimensions | 260 x 390 x 260 mm |
| Compatible SLS Materials | Polyamide 12 (PA12), Polyamide 11 (PA11), Flexible TPU, ULTEM, ONYX |
| Consumables | AMT FA5802 (PostPro Pure Green Chemistry Cartridge) |
| User Interface | Touchscreen with pre-programmed material processing profiles |
| Safety & Environment | Fully sealed closed-loop vapor system with integrated air filtration |
| Power | 230V / Single Phase / 15A |
Experience Vapour Smoothed Parts Firsthand
Don’t purchase system architecture based solely on specifications. Send us a CAD file or printed part.
Our technical team will vapour smooth your design then ship the physically verified components directly to your address for performance testing.
Strict NDA compliance on all engineering files
Zero charge for initial qualified AU manufacturing entities
Frequently Asked Questions
The process works in four automated steps inside a sealed chamber:
Part Conditioning: Parts are placed inside the chamber and prepared under controlled temperature and vacuum conditions.
Processing: AMT’s proprietary solvent vapor (PostPro PURE / FA5202) is injected into the chamber. The vapor evenly condenses across complex geometries, melting away surface peaks and micro-cavities.
Curing: The vapor is evacuated, allowing the surface material to resolidify uniformly.
Drying: The system thoroughly dries the parts, leaving them sealed, smooth, water-resistant, and ready for immediate end use.
Printing Technologies: Multi Jet Fusion (MJF), Selective Laser Sintering (SLS), Selective Absorption Fusion (SAF) and High Speed Sintering (HSS). Some FDM can also be compatible but depends on the material.
Materials: Rigid engineering plastics and elastomers including Polyamides (PA11, PA12), Thermoplastic Polyurethane (TPU), and Polypropylene (PP) (using dedicated media).
Yes. AMT’s desktop systems utilize PostPro PURE (FA5202) consumable chemistry, which is non-hazardous and environmentally friendly. The closed-loop vacuum design ensures operator safety during processing. Additionally, treated parts are safe for skin contact and compliant with food contact standards depending on the base polymer.
Vapor smoothing only treats the outer surface layer (the “peaks and valleys” left by powder bed fusion) without affecting core dimensions or mechanical strength. In fact, sealing the surface pores improves mechanical performance by reducing moisture absorption and increasing tensile strength and fatigue resistance.
There is no upgrade program for the Fuse 1 series to the Fuse X1. Fuse X1 is not a new version of Fuse 1+ 30W, it is a separate product category.