{"id":650,"date":"2026-11-03T12:56:44","date_gmt":"2026-11-03T04:56:44","guid":{"rendered":"http:\/\/www.simplevcc.com\/blog\/?p=650"},"modified":"2026-11-03T12:56:44","modified_gmt":"2026-11-03T04:56:44","slug":"can-pvc-shrink-tube-be-used-in-vacuum-environments-44ec-c65fc9","status":"publish","type":"post","link":"http:\/\/www.simplevcc.com\/blog\/2026\/11\/03\/can-pvc-shrink-tube-be-used-in-vacuum-environments-44ec-c65fc9\/","title":{"rendered":"Can PVC Shrink Tube be used in vacuum environments?"},"content":{"rendered":"

Hey everyone, it\u2019s [Your Name] from the shrink tube team \u2013 you know, the guy who\u2019s always getting DMs from folks asking, \u201cWait, can your PVC shrink tube even handle a vacuum environment?\u201d I get it. If you\u2019re working on a space satellite component, a high-vacuum industrial furnace seal, or even a vacuum packaging setup for specialty gear, you can\u2019t just slap any old tube on and hope for the best. I\u2019ve fielded this question at trade shows, over Zoom calls, and even late-night Slack messages, so let\u2019s break this down straight \u2013 no jargon, no fluff, just the real deal from someone who\u2019s spent years testing this stuff. PVC Shrink Tube<\/a><\/p>\n

<\/p>\n

First, let\u2019s start with what PVC shrink tube actually is, for anyone who\u2019s new to the game. PVC (polyvinyl chloride) is a common plastic we use in tons of products \u2013 from phone cables to credit cards to, yeah, shrink tubing. The shrink tube we make is cross-linked first, then heated to stretch it, so when you heat it up later, it contracts tight around whatever you\u2019re wrapping. That cross-linking is key, right? It\u2019s why it holds its shape better than regular PVC. But vacuum environments? That\u2019s a whole different beast. Vacuums pull air out, create low pressure, and can cause plastics to do weird things \u2013 like outgassing, shrinking unexpectedly, or even breaking down.<\/p>\n

Let\u2019s get into the core question: Can it work short-term, or in low-vacuum setups? The short answer is: sometimes, but with a bunch of \u201cifs.\u201d If you\u2019re dealing with a rough vacuum \u2013 like a vacuum cleaner\u2019s hose, a basic lab vacuum chamber that only pulls down to 10 torr (that\u2019s super low, way weaker than, say, space vacuum) \u2013 our standard PVC shrink tube will actually hold up pretty well. We tested this last quarter for a customer who wraps wires inside a basic vacuum oven. They needed a tight seal to keep dust out, and PVC shrink tube worked perfect there \u2013 no outgassing, no shrinkage mid-use, no issues for the 6-month trial run. But here\u2019s the catch: that\u2019s low-vacuum, not high-vacuum. If you\u2019re talking about medium or high vacuum \u2013 like 10^-5 torr or lower, which is what you get in semiconductor manufacturing, satellite components, or high-end analytical equipment \u2013 standard PVC? It\u2019s not great. Why? Outgassing. That\u2019s the big one.<\/p>\n

What\u2019s outgassing, exactly? It\u2019s when trapped gases, moisture, or volatile compounds inside the PVC escape into the vacuum. Think of it like when you pop a soda can \u2013 bubbles (gas) come rushing out. In a vacuum, that escape is way more extreme. Our standard PVC has a bunch of additives, right? Plasticizers to make it flexible, stabilizers to keep it from breaking down from heat, sometimes flame retardants. Those additives are small molecules that can easily vaporize in high vacuum. When that happens, two bad things occur: first, the tube itself gets thinner, maybe even brittle, because those additives are leaching out. Second, those fumes coat any sensitive parts nearby \u2013 like a sensor lens, a semiconductor wafer, or a satellite\u2019s delicate circuit board. That\u2019s a non-starter for almost any critical vacuum application. We had a customer a couple years back who tried our regular shrink tube in a small high-vacuum test chamber for a sensor project. A week in, the outgassing left a thin film on their laser detector, and it ruined a $10k part. They switched to a different material after that, and we\u2019ve learned a ton from that mistake.<\/p>\n

But wait \u2013 not all PVC shrink tube is the same. We make a special grade for just this scenario, and that\u2019s a game-changer. Our high-vacuum rated PVC shrink tube is formulated with zero or super low levels of volatile additives. We take out almost all the plasticizers that outgas, replace them with ones that are stable even in low pressure, and test every batch to make sure the total mass loss (TML) \u2013 that\u2019s a standard test for how much stuff a material outgasses \u2013 is under 1%. The space industry usually requires TML under 1% and collected volatile condensable materials (CVCM) under 0.1%, and our high-vacuum PVC hits those marks. We tested a roll of it last year at a local university\u2019s vacuum lab \u2013 we pulled it down to 10^-7 torr, which is almost outer space level, and ran it for 30 days. The TML was 0.6%, way under the limit, and the tube stayed flexible, no cracking, no unexpected shrinkage. That\u2019s the stuff you can actually use for medium to high vacuum.<\/p>\n

Another thing to consider is thermal stability in vacuum. Wait, in regular air, PVC starts to break down around 140\u00b0C, right? It emits HCl gas, gets yellow and brittle. But in a vacuum, the lack of oxygen changes that. Vacuum environments don\u2019t have air to feed combustion, so PVC can handle higher temperatures \u2013 up to like 200\u00b0C \u2013 before it starts breaking down. But that\u2019s only if it\u2019s the high-vacuum grade. Standard PVC would still break down faster in high vacuum than regular air, because the outgassing happens quicker, speeding up the degradation. So if your vacuum setup has heat (like that oven I mentioned earlier), you need the grade that\u2019s built to handle both vacuum and heat.<\/p>\n

Let\u2019s talk about common use cases, because that\u2019s what most people care about. When should you even consider PVC shrink tube for vacuum? If it\u2019s: 1) Rough vacuum (under 1 torr), 2) Non-critical parts where a tiny amount of outgassing won\u2019t mess up other components, 3) Temporary setups (like a test run that only lasts a few days). For example, a hobbyist building a small vacuum chamber for a home brewery test \u2013 our regular PVC shrink tube would work just fine here. It\u2019s cheap, easy to apply, and you don\u2019t have to worry about ruining a $100k project. But if your setup is: 1) Medium or high vacuum (over 1 torr), 2) Critical components (sensors, semiconductors, space parts), 3) Long-term use (months or years), then you need that high-vacuum grade PVC, or even a different material like FEP or PTFE. Wait, why not FEP or PTFE? They\u2019re great for high vacuum, but they\u2019re way more expensive, harder to shrink evenly, and not as good for low-temperature applications. PVC\u2019s still a solid pick when you need a cost-effective, easy-to-apply option that\u2019s vacuum-safe, as long as you get the right grade.<\/p>\n

We also get a lot of questions about application tricks for vacuum use. It\u2019s not just about the tube \u2013 how you apply it matters too. First, make sure the surface you\u2019re wrapping is super clean. Any oil, dust, or moisture on the wires or parts will get trapped under the shrink tube, and in a vacuum, that moisture will outgass and cause bubbles. We always tell customers to wipe the surface with isopropyl alcohol before heating the tube. Second, don\u2019t use too much heat. PVC shrinks at around 120-150\u00b0C, but if you blast it with a heat gun that\u2019s too hot, you can burn through it, which leaves holes for air to get in. In a vacuum, holes are bad because they\u2019ll let air leak into your chamber. Third, if you\u2019re using it in a long-term vacuum setup, check on it every so often. Even the high-vacuum grade can get a little brittle after a year or two, especially if there\u2019s temperature fluctuations. We usually recommend a yearly inspection for parts that are hard to reach.<\/p>\n

I should also be honest about the limits. No PVC shrink tube is going to work in deep space vacuum (like 10^-12 torr) for 10 years straight. Even our high-vacuum grade will slowly degrade over that time, especially if it\u2019s exposed to solar radiation. For those applications, you need something like polyimide, which is way more stable. But for most industrial vacuum environments \u2013 think semiconductor processing, food packaging (wait, vacuum packaging for food? Yeah, our food-grade PVC shrink tube works great there, no outgassing that would make food unsafe), medical device sterilization \u2013 it\u2019s more than enough.<\/p>\n

Wait, let\u2019s circle back to that customer story I mentioned earlier. The one who ruined their laser detector with standard shrink tube? We made it right. We offered them a custom batch of our high-vacuum PVC shrink tube, and they\u2019ve been using it for two years now, no issues. They actually came back and placed another order last month, saying it\u2019s saved them thousands in replacement parts. That\u2019s the stuff that matters to us \u2013 not just selling a product, but making sure it works for your specific use case.<\/p>\n

I know there\u2019s a lot of conflicting info online about this. Some blogs say PVC is never good for vacuum, others say it works for everything. The truth is, it\u2019s not black and white. It depends on the grade of PVC, the vacuum level, the temperature, and how you apply it. We test every single batch of our shrink tube for outgassing, thermal stability, and shrink rate, so you don\u2019t have to guess. We don\u2019t just sell a generic PVC tube \u2013 we tailor it to what you need.<\/p>\n

If you\u2019re still on the fence, here\u2019s a quick checklist:<\/p>\n

    \n
  1. What\u2019s your vacuum level? Rough = standard PVC works. Medium\/high = high-vacuum grade only.<\/li>\n
  2. Is the application critical? If it\u2019s a $1 part for a test setup, standard is fine. If it\u2019s a $10k sensor, go high-grade.<\/li>\n
  3. How long will it be used? Temporary = standard. Long-term = high-grade.<\/li>\n
  4. Is it heat exposed? Yes = high-grade. No = maybe standard, but test first.<\/li>\n<\/ol>\n

    At the end of the day, PVC shrink tube is a solid option for many vacuum environments \u2013 you just have to pick the right type. We\u2019ve been in this game for over a decade, and we\u2019ve tested hundreds of setups, so we can help you figure out what works for yours. No fluff, no pressure, just straight answers.<\/p>\n

    <\/p>\n

    If you\u2019re looking to test a batch, or you need a custom size, or you just have more questions about which grade is right for your vacuum project, hit us up. We\u2019ll send you a free sample if you need it, walk through our test data, and make sure you don\u2019t make the same mistake that customer did a few years back. We\u2019re not just suppliers \u2013 we\u2019re guys who know shrink tube, and we want to help you get it right.<\/p>\n

    PET Shrink Label<\/a> References:<\/p>\n

      \n
    1. NASA Goddard Space Flight Center. (2020). Materials and Processes for Spacecraft. NASA Technical Publication.<\/li>\n
    2. International Organization for Standardization. (2018). ISO 10993-5: Biological Evaluation of Medical Devices \u2013 Part 5: Tests for In Vitro Cytotoxicity. ISO.<\/li>\n
    3. Society of Vacuum Coaters. (2021). Vacuum Materials Handbook. SVC Press.<\/li>\n
    4. American National Standards Institute. (2019). ANSI\/UL 510: Standard for Shrink Tubing. ANSI.<\/li>\n
    5. DuPont. (2022). Outgassing Properties of Thermoplastic Polymers. DuPont Technical Bulletin.<\/li>\n<\/ol>\n
      \n

      Shenzhen Golden Ocean Industrial Development Co., Ltd.<\/a>
      Shenzhen Golden Ocean Industrial Development Co., Ltd. is one of the most professional pvc shrink tube manufacturers and suppliers in China, specialized in providing the best customized service. We warmly welcome you to wholesale high quality pvc shrink tube for sale here from our factory. Contact us for pricelist.
      Address: 7#, The 2nd Road, Hongling Industry Park, Liulian, Pingdi, Longgang District, Shenzhen City, Guangdong, China.
      E-mail: goldenocean012@126.com
      WebSite:       https:\/\/www.goshrinkproducts.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

      Hey everyone, it\u2019s [Your Name] from the shrink tube team \u2013 you know, the guy who\u2019s … Can PVC Shrink Tube be used in vacuum environments?<\/span>Read more<\/a><\/p>\n","protected":false},"author":216,"featured_media":650,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[613],"class_list":["post-650","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-pvc-shrink-tube-47b6-c6944a"],"_links":{"self":[{"href":"http:\/\/www.simplevcc.com\/blog\/wp-json\/wp\/v2\/posts\/650","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.simplevcc.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.simplevcc.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.simplevcc.com\/blog\/wp-json\/wp\/v2\/users\/216"}],"replies":[{"embeddable":true,"href":"http:\/\/www.simplevcc.com\/blog\/wp-json\/wp\/v2\/comments?post=650"}],"version-history":[{"count":0,"href":"http:\/\/www.simplevcc.com\/blog\/wp-json\/wp\/v2\/posts\/650\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.simplevcc.com\/blog\/wp-json\/wp\/v2\/posts\/650"}],"wp:attachment":[{"href":"http:\/\/www.simplevcc.com\/blog\/wp-json\/wp\/v2\/media?parent=650"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.simplevcc.com\/blog\/wp-json\/wp\/v2\/categories?post=650"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.simplevcc.com\/blog\/wp-json\/wp\/v2\/tags?post=650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}