Casting with Polyurethane

Tutorial on how to cast a part with polyurethane in a silicone mold. We used Sharkthane Hard Pro 70-20. It is 1:1 Shore hardness 70D 90 sec gel time polyurethane. You can find it on www.fiberglasswarehouse.com.

[@TimoBirnschein]

Short and sweet! Thank you!

[@appleoneill5135]

Great, thank you for the information

[@DesTries]

Do you know where you can find 80a and 95a liquid? Or do you have any kinds you'd point me too? I'm using this for automotive bushings. Google is not very clear.

[@kumarsk6300]

We useing for this abrasive powder coating for cotton thread

[@alextoader2880]

Hi, great vid. Is there a material that can be cast at room temp and which is as durable as PP? I am looking to make a car part which is very thin - 1-2 mm and I need a very strong material. Do you have any idea pls? I understand that Polyamide or TPU could be - but can they be cast? Or is Polyurethane good too?

[@SametAYHAN]

+Fiberglass Warehouse Is there any difference between Polyurethane used for casting and laminating? Is this can be used either way?

[@jbaasdad]

This is a casting polyurethane. For laminating, polyester is used.

[@mustafakhalil007]

thermoplastic or thermosetting?

[@ELPaso1990TX]

Any good for making model Airplane wings?

[@JohnWayne99999a]

what kind of resin would you recommend to coat some stripped wires that
are T-joined (so I can't use heat-shrink tubing unfortunately)

[@chuckd366]

What about paint on tape?

[@thelongranger55]

Good idea

[@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 and need your support. Thanks Jibin Thomas

[@tronetrickard7130]

Is it rigid or soft?

[@dalton11231]

Is it food safe

[@DarkLinkAD]

Can you use this with fiberglass material.

[@fiberglasswarehouse7847]

+DarkLinkAD - Polyurethane isn't used very often with fiberglass. It is more expensive than polyester resin. But yes, it can be used with fiberglass, but rarely is.

[@jbaasdad]

No, it cannot.

[@ArcticFlies56]

So this is a mix, pour and let stand. No need for a pressure pot?

[@godurmumishot]

I was thinking the same thing. Usually polyurethane would foam without the pressure pot.

[@Ozekvanfretelin]

Is that cast float on water ???

[@jbaasdad]

No It cannot.

[@DingleDut]

Is this rubber? I'm new to this..

[@jbaasdad]

No, it is a hard plastic. But polyurethane comes in different durometers, from soft rubber to hard plastic.

[@royalrevue23]

@@jbaasdad hard plastic would that consider like vinyl toy material ?

[@tuongphatdep2882]

do you have stl file for rotate in 1:33 minute

[@raj49328]

don"t we have to degas the PU resin before casting?

[@herbschumann4906]

Not for something like this. That poly is thin to begin with and the part they're making is going to be used for anything structural, take any weight, or be exposed to any sort of extreme temperature.

[@fiberglasswarehouse7847]

Ideally, yes.

[@jasonmorgan661]

Never use naptha

[@impulsiveurge5837]

Why do other use urethane? Why are you using polyurethane? Its so confusing.