Make any shape you want with PU rubber!

In this video I show you all the steps you need to cast PU (polyurethane) rubber in almost any shape you want. For my tank track skateboard I needed rubber blocks for the tracks. I couldn’t find something that would fit so I decided to make my own..
This video is sponsored by Silicones and More. Need material for your project: bit.ly/2EWoEzK
Want to support The Practical Engineer? Get exclusive BTS and extra content:
/ thepracticalengineer
For more projects, build plans and other stuff:
www.thepracticalengineer.com
Check out the gear I use and recommend here: kit.co/ThePracticalEngineer
Also check out my other social media:
Instagram: / thepracticalengineer
Facebook: / emielthepracticalengineer
Twitter: / prctclengineer
Pinterest: / practicalengineer

[@outspokeninsider752]

All these people in the comments apparently cannot read even their own language. English captions are available if you are monolingual. Great guide. Thanks a bunch!

[@Thepracticalengineer]

Whaha Thanks a lot!

[@v1ncen715]

All these people are right. Adding a note in the title saying the actual language this is in is the expectation. Usually any non English video has a title in its own language or if not at least mention the language in brackets. If too lazy to to do so, I would explain people to complain about it, for good reasons.

[@johnc3525]

@@v1ncen715 Agreed. People put titles in English and then speak in a different language. It's just dumb.

[@MrEratrace]

It's a bit late, but you should really vent or use gas masks with the right filter. Isocyanates are nasty for your lungs ;) and this resin (as most flexible PU's) catalyse with amines, which are also nasty for your lungs

[@alleexxx]

Yup. Even leaving a final casted product in an enclosed room without any post curing/ degassing period. At least he wore a smok though

[@truck6859]

Thanks for the safety tip!

[@Dragon-Slay3r]

👍

[@CrudeButEfficient]

Great job! I'm excited to see the final result!

[@Enrique2k52]

Excellent class, thank you!!!

[@BrianMillerCEO]

someone who takes safety first to a whole new level

[@FigmentsMade]

So good! I never thought about making my own tracks! I am looking forward to seeing the whole skateboard!

[@Rr-cr4qu]

what is this (tracks)?

[@shabadooshabadoo4918]

@@Rr-cr4qu 0:03

[@TheL8P]

Really in-depth video, clearly put.

[@fishy03]

I remember how i found this channel. Thanks un poco de todo xd

[@Thepracticalengineer]

UPDT :)

[@frederickwolf8413]

Wow, simply amazing, now designing molds for tires for my 1955 powered reel mower. Yes I do need to get a life!

[@rexmcstiller4675]

How good does it bind to itself? Could I pour multiple layers in the form to make a hollow object? I want to make a safe breecher tool for airsoft but think when I pour the head as one solid piece it would get quit heavy. So my idea was to pour bit by bit in the mold until I have a thick enough shell and fill it then with self expanding foam.

[@alexanderbogdan8327]

You’re among my favorites on KZbin right now! 🇷🇴👌

[@Thepracticalengineer]

Thanks! Thats awesome to hear!

[@carloshnunez]

Very good video, You can also build a vibrating table to take air bubbles out after pouring into the mold 👍👍👍

[@mokhtarsryer4677]

What is the component A and B ????

[@GrahamLeach]

Great video. Great job explaining. Great tips. Cool looking project. 10/10

[@mokhtarsryer4677]

What is the component A and B ???

[@Everythings_Adjustable]

Very interesting Thanks Emiel 👍👍

[@truck6859]

If you wanted to coat a special-shaped wire ring with polyurethane, would you use a mold or apply it with gloved fingers?

[@chriskazaglis]

Did you have to sand or polish your mold? The rubber casting came out incredibly smooth.

[@scottdoran3112]

Great video, thanks for sharing...

[@Sawer]

I used to watch your channel a while ago and I remember them beïng English... Maar Nederlands versta k nog beter :p Toffe video man!

[@Thepracticalengineer]

Thanks! Leuk om te horen!

[@cncprojekte5901]

Ek praat Afrikaans en, ek verstaan ook 😀

[@channelwanderer7010]

Great video. Every day is a school day. Thanks for this.

[@Thepracticalengineer]

Thanks! Glad it was helpful!

[@Donder1337]

Wat een goed idee!

[@ashwynn4177]

Up to what temperature can this handle? I want to do zinc casting @420°C.

[@jukkamathijssen6129]

Top video, thanx weer. Veel Van geleerd 💫🙏🏻✅

[@Thepracticalengineer]

Leuk om te horen Jukka!

[@khandam7709]

I want to put a 5mm coating on some 40mm diameter bearings that are 12mm thick. for a final bearing diameter of 50mm. How do I prevent the polyurethane from seepign into the bearing races and destroying the bearing? is there a special type of tape or glue for that? Some company quoted me over $2000 to put a 5mm coating on some 40mm outer diameter bearings, but I want to save money and do it myself.

[@JohannesKainzkaijoc14]

Amazing video man, where can i get the PU resin that you used here? Gonna try making street wheels for the electric mountain board with it🤩

[@Thepracticalengineer]

I got it from siliconesandmore.com

[@rustynutz4493]

I'm impressed ! great job. I need a hollow t intake manifold for a Cushman 22 hp engine . Would this prouduct stand up to fuel and some heat ?

[@Thepracticalengineer]

I don't think that it will last in that environment..

[@Prophet10Joseph10]

Very interesting. You know you could also sprinkle aluminum dust over the top before it drives, for traction grip on concrete that will not wear the rubber.

[@astefanlopez]

Which number is the hardness shore of the PU Rubber you used?

[@aros007z]

Awesomeness

[@garrett9697]

Could this process and product be used to make custom weatherstripping for classic cars.

[@Thepracticalengineer]

Yeah probably

[@hoppend]

Goed en informatieve video! Deze skill gaat ook bij mij nog op de wishlist!

[@Thepracticalengineer]

Leuk om te horen! De mal maken kan op een hoop manieren en is ff een handigheid, het gieten zelf valt allemaal goed te doen.

[@hoppend]

The Practical Engineer het gaat om vervangende onderdelen voor origineel rubber. Maar er zit denk ik wel verschil tussen de eigenschappen

[@Thepracticalengineer]

Ja er zit natuurlijk wel wat verschil in. Als je een specifiek project heb en daar een methode en materiaal bij zoekt zou ik zeker even contact opnemen met silicones and more. Ze vinden het erg leuk om te helpen en te adviseren.

[@nasrullahaziz361]

how strong is this material? because I want to make a mold that can be pressed, please help me

[@Rich77UK]

I know you will have thought of this...but a draft on those pins (both machined and metal) could have helped. Brilliant idea and execution.

[@Thepracticalengineer]

Thanks! That would certainly have helped!

[@kumarkoribilli]

Is it can we prepare smartwatch band straps

[@crzprgrmmr]

By using bolts with the heads this thick, dont you leave too little of the tracks for wear? Looks like the heads of the bolts will start grinding on the asphalt after only 1-2mm of wear

[@Thepracticalengineer]

That's very right. More reason to take it off road :)

[@hansdegroot8549]

Heel interessante video. Bedankt voor het maken. Direct na de video de link naar de website gevolgd. Ze hebben daar echt alles voor creatieve geesten (of voor mensen die denken dat ze eventueel een creatieve geest zouden kunnen worden) Echt top. Ik had nog nooit van het bedrijf gehoord.

[@Thepracticalengineer]

Leuk om te horen! Ja dat is zeker waar :) wat ik zelf erg leuk vind is de manier waarop ze meedenken en adviseren

[@jessekent2262]

What keeps the screws on the sides of the tracks, the ones that hold the links together, from being screwed down too far and binding the tracks, or from backing off and coming out? Are you just putting permanent thread lock on them and screwing them to the right depth or something?

[@Thepracticalengineer]

Yeah, its semi permanent thread lock and it seems to hold up so far.

[@jessekent2262]

@@Thepracticalengineer Very cool, Thank you!

[@mayurramani4675]

How to get this material? Please advise

[@Jyotishka-mini]

Nice Lessons. give some DIY CNC router (tABLE TOP, like yours) detail.

[@Emorgaly]

danke für das Video, auch wenn ich nur 2/3 verstanden habe, aus SprachBarrieregründen 😅😂

[@jibinthomson1010]

Good Day, Please help me to find the exact raw materials for making polyurethane rollers (PU- for coating in steel rollers) Required Hardness: 70 to 80 I have mold ...... 1. what are the solids in two bottles in your video ? 2. pigment name for black ? 3. mold release agent name - 80 hardness required .. need your support. Thanks Jibin Thomas

[@AAACv-ud3nh]

Good video Bro

[@Thepracticalengineer]

Thanks a lot!

[@ecsyntric]

Keegan-Michael Key has a nice side gig

[@stuartbrowne3358]

excellent video, great idea to cnc the mould, other option is to make a mould out of silicone, no release needed, only one comment when using PU you must use a resperator with the equivelant filter to an 3M ABEK1, PU vapour is really bad for you, you can become highly allergic to it, two of my friends became like this, one was hospitalised the other the blood vesels in his eyes burst every time he is near PU

[@Thepracticalengineer]

I always use a mask nowadays. But thanks for the heads up!

[@Geilerburner]

Hello, does this material float on a gasoline oil mixture?

[@Thepracticalengineer]

Not sure. Are you trying to make a boat for in a gasoline tank?

[@pby1000]

Can you make a hose?

[@cristianpopescu78]

Great! Amazing is that I can understand you with my german language, is this holländisch? 👍

[@Creative_Electronics]

0:04 dienen die rubberen blokjes niet voor grip te hebben op de weg? Leuke video trouwens ;-)

[@Thepracticalengineer]

Jij hebt opgelet! Zeker weten :)

[@Creative_Electronics]

@@Thepracticalengineer Altijd, Je maakt écht heel goede video's! :)

[@MrBrettStar]

A lot better option than 3D printing, imagine doing that many with 100% infill

[@tjpprojects7192]

Easier to print a mold and finish it, then pour this stuff into it for a final product.

[@simonbanderas3806]

Thanks man, this is to much for me.

[@ashwynn4177]

The price?

[@an7d7y]

Can I use a mold made out of silicone ?

[@Thepracticalengineer]

Yes that's possible

[@burgeryoufoundbehindthegrill]

I thought this was going to be about a machine that shapes poo into any shape you want. The Poo Rubber.

[@Thepracticalengineer]

I never had a need for such a machine personally

[@dominiekvinckier2636]

Hoi voor rc vrachtwagen wielen schaal 1/12 zou dat ook lukken bedankt bij voorbaat

[@Thepracticalengineer]

Dat zou zeker moeten lukken inderdaad

[@dominiekvinckier2636]

Maar eerst moe ik nog de moelle kunnen maken heb je daar tips of filmpjes van ?

[@micmike]

You didn't need to degas that resin? What life expectancy do those parts have?

[@Thepracticalengineer]

This is to thick to pour in a couple of minutes so no time to degas.. But since it's all black there are no visible bubbles.

[@iamkian]

heel mooi gedaan.. alleen ik zie geen playlist op 8:04 :-(

[@Thepracticalengineer]

Nu staat hij er wel. #vergeten 😯

[@alimohammedalimohammed4602]

Haw to polyurhten leqed

[@PhG1961]

Schitterend !

[@Thepracticalengineer]

Dankjewel Philip!

[@boots7859]

Its great that you're getting sponsors, however it would be great for us if you could give a $/#/Euro cost of per part.

[@suhayl5157]

I came here to get an insight on how to cast rubber parts, instead i found someone who is telling me how to mix up rubber. its how to make the mold that is important. do you think everyone has a cnc machine at home?

[@Thepracticalengineer]

In this video I show how to make it this way, there are 100's of ways to make the mold. Here you go for a more standard option: kzbin.info/www/bejne/nnqWZ5uIqrKZo68

[@mrfester42]

What did he say???

[@Josh_Luijsterburg]

65 blokjes voor 2 rupsbanden? Oneven aantal? 😊

[@Thepracticalengineer]

Ik maak een langer. Voor de bochten 😉

[@Josh_Luijsterburg]

Dan draai je rondjes 🤔

[@Thepracticalengineer]

Dat is toch juist goed? Anders moet je terug lopen 😂

[@Josh_Luijsterburg]

En 3 keer links is ook rechts 😉

[@lostgravid8941]

make moulding so much money to spend for this in my opinion in Indonesia

[@mats8360]

Episch

[@Thepracticalengineer]

Dankjewel Mats!

[@chewymaster54]

WHAT IS THE MOLD MADE OF!?

[@hoekstratechniek]

Looks like acetal

[@chewymaster54]

@@hoekstratechniek ty!

[@kevinred881]

I hablar ispanish

[@Thepracticalengineer]

:)

[@aenjeong4056]

Se que no tiene nada que ver pero CALVOOOOOOOOOOO!!!! :>

[@mfmr200]

i thought this video is in english and i'm very confuse why i don't understand it.. lmao.

[@DJIInLondon]

Dude legit sounds like his speaking backward

[@Thepracticalengineer]

Have you tried watching it in reverse? It's an interesting concept where I explain how to take rubber parts and break them up into their liquid form.

[@JaveGeddes]

What was the purpose of writing the titles in English if the video is in whatever that was?

[@Thepracticalengineer]

Title goes with the english subtitles

[@v1ncen715]

views. Why take a minute to add 'Dutch' in the titls where you can spend days nswering each comments about it and generate engagement this way?

[@ovalwingnut]

Title is in English. Description is in English. But the audio is in "foreign"? And yes, I'm being a bit snotty. I don't get it. Literally.

[@jjhack3r]

Title in english... VIDEO NOT IN ENGLISH.

[@backintheworkshop954]

I must have missed something and don't want to sound entitled but I am curious why you have stopped talking in English? Surely you are accessable by more people speaking in English and so grow your channel more Just curious...love the videos tho

[@RowanBink]

There was a specific reason for this I don't remember, but all video's have English subtitles

[@Jr-Programmer]

The reason he turned to Dutch instead of English is that he can express himself far better in Dutch than in English. I think there's a video about it.

[@backintheworkshop954]

Coolio, I must have missed that video. Also, dyslexic here so subs make it harder, but it's cool, I was just wondering

[@RowanBink]

@@mofoq just checked the subs in a few random spots in the video and yes, they do seem accurate in my opinion, definitely not auto generated, they have some "Dutch feel" to them, as in, you can tell it's translated, but not by a machine. Also, yes, we do borrow a lot of English words, this is something I find interesting especially if you compare it to something like German. They translate and/or Dub (not sub!) everything. In the Netherlands, shows (except kids shows) will be shown in their original language with Dutch subs.

[@Thepracticalengineer]

Rowan is right about both things. The reason I switched is because I can better express myself in my mother tongue (Dutch) and thus enjoy the build process more. It was a though decision since I know the amount of international viewers who watch my content. I'm looking to make a second channel in english but I need to figure out the best way to do so. In the meantime all the videos on my channel have subtitles that are made by an actual person. Not auto generated at all.

[@WaschyNumber1]

Would be nice if the video would be in English.

[@v1ncen715]

Well, maybe it should say 'Dutch' in the title.. waste of time for me..

[@grahampalmer9337]

Take it you can't read (modern) English. And, as it happens, modern 'Dutch' & modern English come from the same linguistic roots. The nearest to this origin now is West Fresian. Only old (Viking) 0:53 Swedish/Norwegian & the indigenous Brithonic, & Gaelic, dialects that were pushed out to the marginal regions didn't have this origin.

[@v1ncen715]

@@grahampalmer9337 Irrelevant.

[@lukaazz6305]

Trekt op niks

[@hansdegroot8549]

Uw reactie zeker niet.

[@lukaazz6305]

Hooooly shit

[@fahmiakbar88]

I dont understant your language

[@steelcantuna]

Your English is very good, but your accent is very thick. It is hard for me to understand every word.

[@matthiasjoseph]

Loved this channel - once upon a time - when it was english. Now it is not a pleasure trying to hunt after those - often misleading - subtitles.

[@aromalpp6208]

Sir please talk in english

[@Thepracticalengineer]

Hereby

[@wukawak1057]

Man, is really sad that you have stopped talk english. cant understand a word what you say now., and cant follow along any more. sad to see you go this way