Vapour smoothing for SLS 3D printed parts
Raw SLS parts are strong and accurate, but come off the machine with a grainy, matte surface. Our vapour smoothing service uses AMT PostPro technology to give them a smooth, sealed, semi-gloss finish that looks and feels like an injection-moulded part.
- Consistent results, from one-offs to production batches
- Dimensions and fine detail preserved
- Printing and smoothing under one roof
Need the parts printed too? See our SLS 3D printing service.
How it works
How vapour smoothing works
An automated, closely controlled process, so results are consistent part to part and batch to batch.
Step 02
Smooth in a sealed chamber
A controlled vapour softens the outer surface so it reflows smooth, reaching internal channels and complex areas too.
Step 03
A sealed, even finish
The surface sets again, leaving a uniform semi-gloss finish. Smoothed parts can also be dyed for colour.
Benefits
Benefits of vapour smoothed parts
Moulded look and feel
A smooth, semi-gloss surface that's pleasant to touch and looks like a finished product.
Sealed surface
Seals the naturally porous surface of SLS nylon, improving resistance to moisture and liquids.
Easier to clean
Without surface pores, dirt, oils and bacteria have far less to cling to. Ideal for handheld products.
Better mechanical performance
Removing surface roughness reduces the tiny defects where cracks can start under repeated loading.
Better aerodynamics
Smoother surfaces cut drag, a real benefit for drone parts, fans and ducting.
Minimal dimensional change
Only the very outer surface is affected, so dimensions and fine features are preserved.
Compare finishes
Vapour smoothing vs other finishing methods
- Hand sanding: labour-intensive, inconsistent and can't reach internal features
- Media tumbling: smoother, but not sealed, and can round sharp edges
- Coating or painting: adds thickness, can chip and needs extra preparation
Vapour smoothing treats the whole part evenly, keeps the detail and seals the surface without adding material, making it the best route to a high-quality finish on SLS parts.
Where vapour smoothing makes the difference
Ideal for low volume production runs as well as one-off parts.
Consumer products
Handheld devices, wearables and products where look and feel matter.
Drone and UAV parts
Lower air resistance and a tougher surface for airframes and housings. See our drone parts page.
Fluid handling
Ducts, manifolds and channels that benefit from a sealed, smooth internal surface.
Presentation prototypes
Prototypes for investors, trade shows and demos that need to look like the finished product.
Start your project
Get a quote for vapour smoothing
Send us your CAD files and quantities. We print in PA12 Nylon and smooth in-house, so your parts go straight from printer to finishing.
What happens next
- We review your files and finish requirements.
- We advise on material, finish and colour.
- You get a clear quote and an honest lead time.
Based in Arlingham, Gloucestershire, delivering across the UK.
Tell us about your parts
Fill in the form and attach your files. We'll get back to you with advice and a quote.