---
title: "Vapor Smoothing TPU and Elastomers | AMT PostPro"
description: "Vapor smoothing TPU and TPE: compatibility by system and consumable, published roughness and production results, and racking tips for flexible parts."
canonical: https://amtechnologies.com/community/guides/tpu-what-we-know/
updated: 2026-10-06
type: guide
---
Community guide Materials / TPU

# Vapor smoothing TPU and other elastomers: what AMT has published

Flexible parts make some of the most striking vapor smoothing examples: lattices, seals, grips and wearables.

- By AMT Team
- Guide
- 1 min read
- Updated Oct 2026
- Sources[1,2,3,4]

## Compatibility

- **TPU** is listed as compatible on all four PostPro systems (SFX, SF2X, SF50 and SF100). PostPro Pure and FA326 both list TPU.
- **TPE** is listed for the SF50 and SF100, with FA326.

## Published results

- **Surface roughness.** BASF Ultrasint TPU01 on HP MJF: roughness from 13.42 µm to 1.18 µm after PostPro vapor smoothing (AMT whitepaper, Nov 2022).
- **Production.** GM’s spoiler closeout seals in BASF Ultrasint TPU01, printed on HP MJF and vapor smoothed: 60,000 parts, needed quickly to avoid delaying 30,000 vehicles[4] (AMT case study, Jan 2023). See [Case study: GM spoiler closeout seals, 60,000 vapor smoothed TPU parts (opens the community forum in a new tab)](https://amtpostpro.discourse.group/t/case-study-gm-spoiler-closeout-seals-60-000-vapor-smoothed-tpu-parts/68).

## Examples you can see

The lattice saddle (MJF TPU) and the TPU bellows are in [AMT gallery: before and after vapor smoothing](https://amtechnologies.com/community/guides/amt-before-and-after-gallery/).

## Racking flexible parts

Soft parts need support that does not distort them. Join the discussion in [Share your best racking setup for TPU lattices (opens the community forum in a new tab)](https://amtpostpro.discourse.group/t/share-your-best-racking-setup-for-tpu-lattices/41).

Forum · Over to you

Which TPU grades do you smooth, and for what? Before and after photos are very welcome.

[Answer in the forum thread (opens the community forum in a new tab)](https://amtpostpro.discourse.group/t/vapor-smoothing-tpu-and-other-elastomers-what-amt-has-published/56)

Next step

## See the price. Run the numbers. Hold the part.

List prices are public and the cost-per-part math is yours to check, with no email needed for either. The free benchmark puts your own parts, vapor smoothed, in your hands.

1. 01 Quote

   ### Build your quote

   Pick a system and its options and get an itemized total on screen, from AMT’s published list prices.

   [Build your quote](https://amtechnologies.com/quote/)
2. 02 ROI

   ### Calculate your ROI

   Compare your cost per part with manual finishing, using your own labor rate and volumes. Every assumption is editable.

   [Calculate ROI](https://amtechnologies.com/roi/)
3. 03 Benchmark

   ### Test your parts, free

   Ship us your parts with a prepaid label. We vapor smooth them and send them back with before-and-after photos and a benchmark report.

   [Test your parts, free](https://benchmarking.amtechnologies.com/submit?utm_source=amtechnologies.com&utm_medium=community-page&utm_campaign=site-2026&utm_content=tpu-what-we-know-decision)

   No cost to evaluate · Parts returned · Typical turnaround 2–3 weeks[5]

Prices: AMT list prices, excluding tax and shipping; confirmed in your formal quote.

[Not sure which system? Help me choose](https://amtechnologies.com/configurator/)

## Sources

1. [Vapor smoothing: SF and X-series family page and SFX, SF2X, SF50, SF100 product pages](https://amtechnologies.com/products/vapor-smoothing/) · AMT · read Oct 6, 2026 · also [AMT](https://amtechnologies.com/products/vapor-smoothing/postpro-sfx-desktop-vapor-smoothing-system/) · also [AMT](https://amtechnologies.com/products/vapor-smoothing/postpro-sf2x/) · also [AMT](https://amtechnologies.com/products/vapor-smoothing/postpro-sf50/) · also [AMT](https://amtechnologies.com/products/vapor-smoothing/postpro-sf100/)
2. [Vapor smoothing consumables: PostPro Pure (FA5802), FA326 and FA9202](https://amtechnologies.com/products/vapor-smoothing/consumables/) · AMT · read Oct 6, 2026
3. [Ultrasint TPU01 enhancement with PostPro vapor smoothing (whitepaper)](https://amtechnologies.com/resources/whitepapers/surface-enhancement-of-ultrasint-tpu01-parts-by-postpro-vapor-smoothing/) · AMT · Nov 7, 2022
4. [GM's success: vapor smoothing for automotive production (spoiler closeout seal case study)](https://amtechnologies.com/resources/case-studies/basf-ultrasint-tpu01/) · AMT · Jan 23, 2023 · also [AMT](https://amtechnologies.com/industries/automotive/) · also [Forward AM](https://forward-am.com/gain-knowledge/blog/additive-manufacturing-gets-cars-into-showrooms/)
5. [PostPro benchmarking: send us your 3D printed parts](https://benchmarking.amtechnologies.com/) · AMT · read Oct 6, 2026