Plastic Gummy Worms – Melting Ski Boot Pebax


Post by WildSnow.com blogger | December 10, 2008      

Mister Science rides again. I’ve been doing some fit punching on my new pair of Dynafit ZZero. Master bootfitter Mark Rolfes does this by feel and it seems to turn out pretty good, but he does find the Pebax plastic to be trickier than the usual polyurethane of most boots. Since I’ll be doing some of the punching myself, I figured using my trusty infrared thermometer could prevent me from over-heating and thus ruining a pair of expensive boots.

I did some web research and found that Pebax plastic is supplied in different varieties with different melt temperatures. Since I don’t know what variety Dynafit uses for their ski boots, some direct observation was in order. (See menus above for our Glossary, which has more info about Pebax.)

Backcountry Skiing

Pebax after the heat gun.

Above are buckle straps from my older pair of ZZero. Top one in photo was malleable at 200 degrees F, while the bottom one melted at around 300 degrees F. I’ll experiment more today while punching the actual boots, and report back, but it appears that the safe temperature for Dynafit Pebax boot punching is probably just over 200 F.

Another thing I discovered was that my variable temperature heat gun is useful, but the temperatures shown on the settings buttons are way off from what the gun outputs. So, thermometer required.

Know there are different types of Pebax with different optimal molding temperatures. Check this out for info.


Comments

9 Responses to “Plastic Gummy Worms – Melting Ski Boot Pebax”

  1. Terry December 13th, 2008 7:33 pm

    Great idea with the infrared thermometer, Lou! Do let us know how it goes.

    Am wondering how useful that thermometer would be for snow pits and avy forecasting. was reading about some remote weather stations that use them for recording surface snow temps.

  2. Ron January 27th, 2009 11:05 am

    Lou,

    Just read about your boot heating experiments. How did the punches turn out?
    I ask because I’m about to have my new Radiums punched and I’m looking for a little ressurance.

    Ron

  3. Lou January 27th, 2009 1:12 pm

    My punched Zzeros are still fine, though when I punched them it did take some of the rocker out of the sole because I got pretty aggressive with the length punch.

  4. Nick Matyas January 14th, 2010 3:45 pm

    It’s an awesome posting.
    It is also very useful for many people like me.
    Your writing is always fabulous.
    Wishing that u will deliver this type of post in future also.

    Webroyalty

  5. matt November 14th, 2012 7:49 am

    Have well have your punches held up on the pebax boots? I want to get vulcans but seems like the pu version of ‘the one’ is my only option if i want to get an agressive sixth toe punch.

  6. Lou Dawson November 14th, 2012 8:00 am

    Matt, they hold up fine but yes, you can get a better punch in PU boots. Mainly, you’ll be able to punch more distance in the PU. Almost all my heat work is on pebax so I’m used to it, and it always amazes me how much easier it is when I work on the rare pair of PU boots. Lou

  7. Frode November 15th, 2012 4:46 pm

    Hi Lou, just received a pair of dynafit mercurys that seems to be ok in the length, but to tight on the sides of my forefoot/last(even if they say that they are 104,5mm wide on the last). My feet are 102mm wide, measured by bootfitters.

    I am wondering if I could do anything with the grilamid to get a better fit.. do you have any experience with this material?

    btw: I have only tried to mold the original liners in my normal baking oven with fan on blowing into the liners.. I am going to try out the “hot water or hot rice in a bag” molding next, to see if I can get more room around my last.

    There are no bootfitters where I live, so I am left to fix this myself…

  8. Lou Dawson November 15th, 2012 5:16 pm

    If you’re not a boot fitter, you’re not equipped to mold the shell plastic correctly unless you’re quite the do it yourself. As for the liners, go for it. Have you skied or hiked in the boots yet? They should feel a bit tight in width when first molded. Not painful, but tight, so they can pack out a tiny bit in use. Lou

  9. Frode November 16th, 2012 4:14 am

    I have not hiked them.. but they feel painful in these particular areas on boths sides of my forefoots (I am used to thicker alpine liners and alpine boots, so touring liners are new for me).

    I had a new look at my original Mercury liners today, it seems that it is only parts of the liner that contains “moldable material”.. an example will be around the anckle. and therefore the sides of my forefoot will not adjust as an result of molding.. maybe I am wrong? Do you guys have any experience here? I can see that you are always throwing out the original liners and put intuition pro tour liners in your reviews.. maybe this is an good option for me to?

    I am not planning to do anything related to electric heat.. but I am considering to heat the outer sides of my boot with boiling water. But, this will only be an option if I can not mold the liners good..

Got something to say? Please do so.





Anti-Spam Quiz:

You can subscribe to comment notification by checking the box to left, but you must leave a brief comment to do so, which records your email and requires you to use our anti-spam challange. If you don't like leaving substantive comments that's fine, just leave a simple comment that says something like "thanks, subscribed" with a made-up name. Check the comment subscription checkbox BEFORE you submit.
If you need an emoticon for a comment just copy/paste off the following list, or use text code you might be familiar with.

:D    :-)    :(    :lol:    :x    :P    :oops:    :cry:    :evil:    :twisted:    :roll:    :wink:    :!:    :?:    :idea:    :arrow:   
  
Due to comment spam we moderate most comments. Please do not submit your comment twice -- it will appear shortly after approval. Comments with one or more links in the text may be held in moderation, for spam prevention. If you'd like to publish a photo in a comment, contact us. Guidelines: Be civil, no personal attacks, avoid vulgarity and profanity.

  Your Comments

  • Matus: @swissiphic - My words. But this is probably the result of the hunt for ISO...
  • Lou2: The Look is just a rebadge. Started a while ago. We covered in at least one...
  • VT skier: Anyone have a problem with the Anti Friction Device , mounted on the ski br...
  • See: I agree— no disclaimer needed (especially after all this discussion). Sorry...
  • Lou Dawson 2: Bruno, thanks. I'm glad you've got a sense of the mission here, nearly 4,00...
  • Equilibrium: Brent, Do you still have the carbon cylinder. I am in the USA and would l...
  • Justin: I mentioned the Look bindings in an unrelated post, but this is much more r...
  • Bruno Schull: Hi Lou--I don't really think the disclaimer is necessary. Anybody who has ...
  • swissiphic: I don't know...with all this incremental weight creep and complexity increa...
  • Lou Dawson 2: See, yeah, wasn't so much making excuses as I was simply setting everyone ...
  • Aaron Mattix: I'm stoked on this simply for the fact that it sheds light on the under-rep...
  • See: Point taken, Lou— the Lance analogy was not fair, but that’s what the “they...
  • Lou Dawson 2: Fox, the book's destinations by intent are not all that exciting, they're m...
  • Lou Dawson 2: Guys, while I've been blessed to acheive my life dream of making a living a...
  • See: Except he didn’t admit it until everyone already knew....
  • See: I gotta say, Lou, that your “they all do it” response to Howard’s point reg...
  • Fox: HI - excited to have another adventure reference. Can you discuss locati...
  • Lou Dawson 2: Thanks Torquil. Lou...
  • Torquil: I see they didn't bother changing the brake plate so its easier to get to t...
  • Lou Dawson 2: test...
  • Kevin Woolley: I'm not a blogger or a professional guidebook writer, but I enjoy high qual...
  • Lou Dawson 2: TMS, RV 10 at your size sounds about right? Good to hear it's working. Help...
  • Lou Dawson 2: Fair enough. Happy to get your opinion. As for writing PR, in the third...
  • Howard: Lou, you will justify in your mind the reasons that guidebooks and blogging...
  • TMS HAWAII: I'm 6'2" and 220 lbs, I use the Radical FT and run the tension @ 10. I feel...
  • Henrik: Thanks for writing endless awesome advice to all us novices! I'm extreme...
  • David: Waiting for your 2017 take on the Superlite 2.0!...
  • Mitch R.: Thank you! This is dream come true for this moderate backcountry skier! W...
  • Lou Dawson 2: Todd, yeah, T20 adjustment is new. Good to hear you're able to run RV 8,...
  • Lou Dawson 2: Can't believe I messed that up, space case! Fixed now. Thanks for the help....

  Recent Posts


Welcome to Louis (Lou) Dawson's backcountry skiing information & opinion website. Lou's passion for the past 50 years has been alpinism, climbing, mountaineering and skiing -- along with all manner of outdoor recreation. He has authored numerous books and articles about ski touring and is well known as the first person to ski down all 54 of Colorado's 14,000-foot peaks, otherwise known as the Fourteeners! Books and free ski touring news and information here.

All material on this website is copyrighted, the name WildSnow is trademarked, permission required for reproduction (electronic or otherwise) and display on other websites. PLEASE SEE OUR COPYRIGHT and TRADEMARK INFORMATION.

Backcountry skiing is dangerous. You may be killed or severely injured if you do any form of ski mountaineering, skimo randonnee and randonnée skiing. The information and news on this website is intended only as general information. While the authors and editors of the information on this website make every effort to present useful information about ski mountaineering, due to human error and passing time, the information, text and images contained within this website may be inaccurate, false, or out-of-date. By using, reading or viewing the information provided on this website, you agree to absolve the owners of Wild Snow as well as content contributors of any liability for injuries or losses incurred while using such information. Furthermore, you agree to use any of this website's information, maps, photos, or binding mounting instructions templates at your own risk, and waive Wild Snow owners and contributors of liability for use of said items for ski touring or any other use.

Switch To Mobile Version