Mold Making and Resin Casting Tips

[Astronopolis]

i have a 2 part latex mold of an object i would like to cast. will the resin stick to the latex and destroy my molds?

[brickintheyard]

@Astronopolis Not sure. I have not cast any of the EZ Flo series resins into latex molds. Do a small test 1st with some 2500 mold release to make sure you don't have any bonding issues.

[BondageNoJutsu]

Plus, I think he was just using the coins as an example of something we're all familiar with and can recognize how the mold catches the tiny details. I was impressed with this video, very nice.

[KewneRain]

Everyone that's saying "you're making fake money, that's illegal!" This is prop money that's one-sided and it WILL NOT work in a vending machine because it's not metallic.

[sirspamsalot2]

would I be able to polish the surface for a more realistic metal finish or would I have to use your sculpt nouveau paints to polish (im talkin about the prop knife)

[brickintheyard]

@sirspamsalot2 The "C" coating from sculpt Nouveau may be polished.

[littlekat25]

Very well made video! Visually easy to see what you were doing and well narrated. I'm about to start learning how to make a cast for a prop piece with clay, then buy the silicone to make the mold, then the resin.

[SuperMac18ROX33]

So basicly, your making fake money... Ilegial!

[iamjonthegreat]

dude!! make a bunch of quarters and get free sodas man lol

[brickintheyard]

@iamjonthegreat I will neither confirm, nor deny, that this would be possible.

[imaqtlolz]

what would i search to find silicon rubber to make molds?

[brickintheyard]

@imaqtlolz go to 7:57

[innocentBystander19]

It's illegal to recreate US currency. I'm just sayin....

[brickintheyard]

@innocentBystander19 Just one side of the coin...

[Warlord2029]

That was cool! The coins looked real...I never thought of using the metallic powders. I always used paints of different shades, but never got the desired effect.

[mewmaster151]

i want to make a mold for a clear resin guitar do you have any tips? im afraid bubbles wold weaken the neck

[brickintheyard]

The strongest clear resin we offer is Poly Optic 1411.

[mewmaster151]

any methods of making sure no bubbles form? putting it in a vacuum while its wet maybe?

[brickintheyard]

Pressure casting is best for removing air from a casting.

[GoldenRatio]

Great video! Just what I've been looking for. One question I have however: I want to cast (using resin, and probably a brass-coloured pigment powder to give a metallic finish) the valve that you can find on on the top of a carbon dioxide fire extinguisher... How could a make a decent mold to cast this part? I don't have access to silicon molds, unfortunately, so I'm a bit stuck as to how I could cast the object in one go. Cheers.

[brickintheyard]

You would need to use a very soft silicone like 71-11 to work around the undercuts.

[GoldenRatio]

Thanks for the reply. So that would definitely be the best silicone to use for this part? I'll try and order some of that a.s.a.p. if that's the case. So would I just have to make a simple box to contain the silicone and then pour it all over the brass valve? I'm a complete novice when it comes to casting so I really don't know what I'm doing. I'm not sure if the mold would have to be in two parts (like you used to make the knife in this vid) or if I could make it one 'solid block' so to speak.

[brickintheyard]

A block mold of 71-11 silicone would work well. Make sure you release the part with 2500 release 1st. 71-11 is stretchy enough you should only have to make minor cuts to get the mold off.

[Dachiefinator]

What is the durability of the resin when it is fully cured? I was watching and seeing the knife at the end was a little wiggly. Does it take a lot to break the resin? I am making custom percussion mallets and have been trying to find a goo durable resin for mallet heads.

[brickintheyard]

Easy Flo is a very durable, impact resistant resin.

[BigAndTall666]

I suggest vibrating (ie. tapping the edges of the mold with a pencil until all air has come up to the surface) the molds to release air bubbles...Air bubbles can be such annoying thing to discover in an otherwise good molding!

[lonnieheadley]

Is it necessary to de-mold while the casting is somewhat "green"? Your videos are great, by the way.

[brickintheyard]

EZ Flo clear castings take a little longer to reach full hardness. EZ 60 castings reach full D scale hardness faster. EZ Clear castings can be removed once cured but still "green" but care should be taken so the cast doesn't distort.

[Edel99]

COOL!

[DoctorWrath]

Could you please give me an idea of where I can purchase casting resin and RTV silicone? I've actually gone to a few places without luck.

[brickintheyard]

Try our webstore. Go to the link at the end of the video or brickintheyard . com

[Chiefhalo19]

That knife turned out really nicely!

[AnthoFlex]

For that knife you made....how well does that paint stay on? I'm looking to make a prop sword and i really dont want the paint scratching or peeling off.

Would primer help? or would I just need the metallic powder paint?

[brickintheyard]

Primer is allways a good idea.

[brickintheyard]

Primer is good. Adhesion promoters like Bulldog are also helpful.

[Acvelleon]

Very helpful. I would like to cast a small sculpture I recently made. Should I use resin or is that more for props? The sculpture is of high quality (in my eyes at least), so I would like a material that lasts.

Also, whom may I ask is your supplier?

[brickintheyard]

Resin is a great medium for art pieces. EZ Flo 60 is a great material. You can get it through us, we are a Polytek distributor.  Check our webstore. The link is at the end of the video and on the channel page.

[Acvelleon]

Thank you, I shall.

[GenkiuHinagiku]

How heavy is a knife like the one you made one it is cured?

[brickintheyard]

Fairly light compared to the real one. About 8-10 oz.

[brickintheyard]

Good question. That is PolyColor. It is a concentrated pigment for use in oil based resins such as Epoxy, Polyester, and Polyurethanes. I believe it is available on our webstore if you can't find a local source.

[cgjeff]

Would the process of using metal pigments like this on a Hydrocal or Ultracal mold be the same? Or would you need to spray on a mold release prior to using the metal powder? (the molds have been sealed with murphy's oil soap)

[brickintheyard]

A sealed mold would need to be released with 2300. Release issues aside, it would be very difficult to pull a resin cast from a hydrocal mold without breaking the mold or the cast.

[cgjeff]

i probably should have mentioned, I'm not actually doing a resin cast, i'm doing a urethane rubber cast from the ultracal molds.

[brickintheyard]

Ah! Much better. In that case, once the molds are sealed spray them with a healthy coat of 2300 release spray and also use a soft brush to push the release into the detail and spray it once more. Let the release dry for 20-30 minutes and cast away.

[MavericSol]

Hi there! just wanted to know how can i make the mold as fine as yours? i'm plaing to build a action figure and wanted sleek arms etc, how do i do this?

Thanks

[jiidee]

Does giving a silicone mold a coating of metal powder also serve to help preserve the mold like talcum might? it would seem to me that if you have a barier between the mold and the resin as its curing that might lessen the wear on the mold, however...it is METAL powder..

[ausphexx]

Point, the powder would (silver or talcum) would stop the resin from sticking to the silicon mold.