WORKING WITH URETHANE RUBBER: Casting Urethane / Polyurethane Rubber in a silicone mold
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- เผยแพร่เมื่อ 3 ก.ย. 2017
- Casting polyurethane rubber using a 2 part silicone mold
here are the links to the materials
Urethane Rubber
US amzn.to/3jvhmlM
UK amzn.to/2wAZQH6
Silicone
US amzn.to/3niFeeL
UK amzn.to/367Aoee
Fibreglass Gel Coat
US amzn.to/3juNOF6
UK amzn.to/3cv8tpD
Polyester Laminating Resin
US amzn.to/34rhlJk
UK amzn.to/363e5GA
Light grey polyester resin pigment
US amzn.to/36u4sAY
UK amzn.to/32XaFTW
300 gsm bonded glass fibre mat
US amzn.to/2Sorgdb
UK amzn.to/3crcIma
Mixing sticks
US amzn.to/2SlFZ8O
UK amzn.to/3cuGaYM
600 ml Mixing Cups
US amzn.to/2SlFZ8O
UK amzn.to/3j5jIru
2" GRP brushes
US amzn.to/3jtNW7N
UK amzn.to/2EuJ82G - วิทยาศาสตร์และเทคโนโลยี
Helpful video, thank you! Look forward to watching more.
This is sooo helpful! Thank you!!
no problem at all, glad it has helped, what are you going to use it for? hope you have subscribed ;-)
Great tutorial, thanks a bunch for sharing! I'l be casting some vintage skateboard parts before long - God bless :)
thats awesome, I'd like to see the results.
What hardness did you use of the Urethane rubber?
Nice video
And pu rubber is one of the best shock absorber rubbers. 🤗
can you use polyurethane rubber on water based base clay
Thank you! Am going to try to recreate the Marc Jacob’s clear sole boots
Please do! and share your results
Do you know how easy it is to set a premade casting of a urethane rubber (most likely a Smooth-On Simpact) into a casting? Failing that, to adhere succesfully two pieces of the same rubber. I am asking this so that multiple colours can be used and set into each other.
How much does it cost to cast one of the pu circles?
Wondering if it would be cheaper to buy them or made them? 🤔
is one of those part a and b the hardner?
Can you cast tank tracks using this method? What is the minimum thickness you can cast with this stuff? I have a few kits that are very old and the rubber of the tracks has gone very brittle and snapped. I have been searching for a method of reproducing them for my models since they look silly without tracks, lol.
Could you mould tank tracks in 1:76 scale using this method.
how strong is this material? because I want to make a mold that can be pressed, please help me
Hi! Thank you for this video! I’m pretty sure this is the exact form of liquid rubber that I would need for my project! I tried finding the polytek PT-Flex 70 casting rubber but it’s all on back order and the link in the description takes me somewhere else 😢 Do you know what would be a good alternative to use that would yield the same result (colorable as well)?
any castable urethane / polyurethane rubber will do, you just have to check the durometer of it, flex 70 is 70 hardness
Great video, thank you
No problem, I am going to be doing a load more maker videos so don't forget to subscribe ;-)
Hey there, I found this video because I've gotten into toymaking with a flex rubber, I absolutley love the medium and it's so fun to cast and mess with. I had a SMALL question that I can't seem to find anywhere else... how do I fix bubbles and imperfections on my rubber casts, ON the actual casts? I don't own a vac chamber so I've been extra careful with my pours, and its working great, but I'd love to somehow salvage some pieces that didnt turn out as good / have big gaps. Can you heat or melt leftovers? Or do like, a paintover or something with another mix of it? I'm just curious how people who work with rubber fix an issue like a gap or bubble hole or have any hacks.
A lot of issues I run into is accidently not checking feet or platforms of my toys for bubbles, so when I pull them out, the feet have some gaps. I just dont know exactly the 'best way' to fix that *and* get a color match, other than making a new batch, holding the figure pefectly up for an hour (cure time) while I wait for it to cure?
TYSM, wonderful video!
you need to allow the air to escape the best way if you have undercuts is to tilt the mould and move it during the pour so it fills everywhere. next thing to try is to cut air channels in the mould.
another tip is to dust the moulds with talc before the pour. good luck
Very nice video, thanks
Glad you liked it!
Thanks for the video,
I want to make a key chain that have 2 colors is that possible or the colors will get mixed?
you will probably have to pour the first colour and let it set before pouring the second colour
i watched at 2021... covid time.
thanks for your lecture sir.
pls continue
thank you for watching and enjoying it ;-)
thanks for the vedio
Most welcome
Great video!! Do you happen to know how one can make poron foam please?
unfortunately not no, but I will keep my eye out for a technique
Great tutorial..
Just out of curiosity, can it be used to cast items leaching into a mould made of "Blue Stuff"?..
blue stuff?? i'm sorry i don't understand what you are asking?
ok i just read up on blue stuff and its a mouldable thermal plastic, in theory yes you should be able to use this as the mould material
There have been good results casting polyurethanes into relatively high detailed "Blue stuff" molds of miniatures. Even better than other more well known hot melt moulding materials.
One quick question. Did you need to use any kind of release agent, or does the urethane rubber not stick to silicone either way?
It doesn't stick the silicone, but if you want to extend the life of the mold then use a release ;-)
Like the scales. Got a link? What's their max allowable weight? Thx much 4 posting vid.
I don't have a link for them i bought them in a high street store, they are just kitchen scales, I put them in a bag to keep them clean then change the bag when it gets dirty.
if you do amazon, you can get one there. however, i prefer to support businesses in my area when possible, helps keep people working so the place doesn't turn into a ghetto, lol. any kitchen store will have them. these aren't rare and expensive items. there's an outlet mall near me, next time i'm there i'll hit the kitchen store up, i think they're like $20 give or take.
Great video, thx. Is the PT-Flex 70 rating on the Shore A? What is the hardness rating for silicone rubber?
its measured in durometer normally, but you can order samples and test them with a Shore A meter
silicone is measured in shore A, I think I used a general-purpose silicone so about 29-20 shore A
Well done! We’re thinking of using this material for our skull-shaped dumbbells that you see in my profile pic to the left of this comment.... They were made with concrete in latex molds. Do you think this complex skull shape can be casted with urethane?
Hi, I had a quick peek at your channel ;-) yeah this rubber can be molded into any shape, though I would probably say you would be better off dipping the castings to get an even coat.
@@NicoProps you read my mind dude! Just bought a couple gallons of that stuff to try out the first couple and if it works we’ll be getting more. Thanks so much!
Cool idea
Hello I am looking for a pourable expanding curable rubber that I durable enough that I can fill the tires on my electric scooter so I can avoid getting flats do u have a recommendation
honestly, you might be better off just buying solid tyres for your scooter, I did that for my 2 electric scooters. I did try some stuff called slime which is used in bicycles to help plug punctures but it didn't help.
Sir, what is the most suitable material for making shoe soles? Silicone rubber (with high shore) or polyurethane rubber? What is the most similar material to the sole of Dr. Martens' boots? Thank you very much! Nice video!
the material dr martins soles are made out of is likely to be something like nylon which is heat moulded and more poured and cured. people use polyurethane rubber as soles on shoes
Hi, Did you use mold release? looking for a release that removes polyurethane from silicone. Thanks
you can use a mold release but its not really needed, you can buy silicone mold release spray if you really wanted to
@@NicoProps Cheers bud
Does this rubber dissolve on the chemicals like gasoline?
Can motorcycle parts be made with it?
I'm not 100% sure , you would have to check with the stockist you buy it from
Do you know the rubber like thing they use for the heads of action figures
I know what you are talking about but not sure what it is, it could be a high durometer urethane rubber,
Love it :p
thanks, really glad you liked it, dont forget to subscribe for more videos coming soon ;-)
How did you add the colour? I'm
looking to get a metallic silver effect on some pieces
errrrm its in the video th-cam.com/video/pfUXdKmLjX0/w-d-xo.html
for metallics watch my other video th-cam.com/video/w4Rel3yyHM0/w-d-xo.html
Thank you sir
Is the Urethane Rubber grippy enough to cast it in the form of tires for a robot?
Yes it should work fine for this
What do I do if I want a matte finish? Is it the pigment or the PU that determines the finish?
sorry for the delay the alert didnt come though so I have only just seen this, so if you want a matt finish you need to make sure your master has the same finish you want the finished part to have basically.
Do you think we can use this to make shoes outsoles? Would it be resistant enough?
wondering this same thing
Isn't polyurethane toxic?
Anyone ever tell you that you look like a young Buzz Aldrin? I'm in Ireland and I have never heard of the supplier you mentioned. Smooth on has a good range but are expensive. There are local suppliers of other products, both equally good quality and much cheaper.
lol no i can't say anyone has told me that i look like a young Buzz Aldrin lol yeah there are various products out there just as good as smooth on , smooth on is expensive because of it being imported from the US
Hi there. Thanks for the video! When I try to cast urethane rubber in a silicone mold, the piece totally cures except for the surfaces that contact the silicone. They are forever tacky and unuseable. Any idea how to mitigate this problem?
sounds to me like there is something on the inside of your mould reacting to the rubber most likely is moisture. try warming your molds up a little in the oven before you use them. or use some talc in your moulds, just some baby powder would do, put a little around the inside of the mould shake it around to get a good coating then bin the excess by bangging the mould out over the bin.
@@NicoProps Hello again sir! I did not realize that you had responded so quickly! Thanks a lot for the tip. I just tried coating the mold with baby powder tonight. If it works, that will be a pretty simple fix. Thanks again!
@@kevinsmart2165 cool let me know how it turns out, and dont forget to subscribe ;-)
@@kevinsmart2165 did it work?
@@jerrywhidby. Hey Jerry, I didn't try heating it up, but I believe I tried baby powder with success. It was only the first castings in new silicone molds that turned out tacky. Subsequent castings turned out fine without anything extra to help.
Is there a hard rubber you can cast?
you can buy this in different hardnesses
Cool. How would it go in a marine setting?
not sure what you mean, could you elaborate?
@@NicoProps would you suggest this to make a flexible fin for a board. I'm thinking of using this material with a breakaway reinforcement inside to make it rigid. Would you recommend this to be used in a salt water environment? Or would it become damaged or ineffective?
can u help in casting nitrile rubber bellow for us
sorry for the delay in response, I have not cast nitrile but it should be the same process
is this the type of rubber that people use for shoes?
Did you find out I’m trying to diy some shoes?
@@kieranb892 It probably could be used for shoes yes.
Can we make outsole shoes with this PU rubber ?
yes you can people dip trainers/sneakers in it all the time.
Is this urethane rubber resistant to salt water?
I have no idea, might be an idea to check with your supplier
Where to get it when located in Europe ?
You can order from Amazon UK in the links above which will ship to the EU
Do you think I could make shoe soles using this method?
yeah you should be able to I dont see why not
How hard is Smooth-On vytaflex 60?
a quick google tells me it is 60A shore hardness ;-)
@@NicoProps I know it's 60A but I wanted an idea how hard is that?
@@smarterthanthem6304 i'm not sure how to describe it, I guess its 2 thirds as tough as a trainer sole at a guess. so just a bit softer. you can order sample cured pieces from most decent suppliers if you wanted to check it first. its what I did. I don't use smooth on products as they are expensive in the UK due to import costs and there are other brands which are much much cheaper here.
I found the polytek 70 on Amazon now, When I was searching for the past few days I didn't came across it, Now one question how hard is the material is it hard enough to use as an embossing material when pressure is applied?
@@smarterthanthem6304 it should be yes, for paper and the like, if the plan was to use it for leather then milling it out of brass, copper or aluminium would be best.
Can you tell me the name of this chemical?
its urethane rubber, there are links in the description above to make it easier for you to buy ;-)
@@NicoProps can it be used for steel wire brush to resist a lead ?
@@huzaifajawed2222 I honestly have no idea
@@NicoProps ok thanks!
@@huzaifajawed2222 no problem, sorry I couldn't be of more help, don't forget to subscribe for more maker videos ;-)
Could you send me a sample to the USA?
sorry i can't do that, you can often get samples from suppliers
Have you had any success painting polyurethane rubber?
I haven't tried to be honest but I expect you would need to have a rubber-based paint with a solvent in it which would also work on the poly casting as well so they bond
Could you make shoe soles out of it?
provided you got the right durometer rubber sure
@@NicoProps thanks for the reaction mate. I'm trying to replicate a russian ww2 boot sole so I'm looking for ways to make a mold and cast. Your video was really useful
@@happy_dutchman sounds interesting, share your results when it's done. just so you know the rubber I used in this video was 85A If i recall, which wasnt all that tuff due to the thickness so if i were you i would go for a higher durometer/shore hardness
@@happy_dutchman don't forget to subscribed and like the video ;-)
@@NicoProps so if I get shore 80a it will be firmer of softer?
Seriously, you needed to show his to put all the elastic bands on?
What the hardness
Of final product
60D