Mold Making Tutorial: How To Make a Brush-On Rubber Mold of a Bust 

This video is invaluable. You're never too experienced to not need a refresher 🤠

Thanks sir, for sharing this .

love the G Funk era music at the end lol

Thanks for your helpful and informative instructions, as always, on mold making and casting. Enjoyed watching. Keep up the great work!

Great tutor! Looks so easy and final mold is perfect

To rotocast Smooth Cast urethane resin, you want to choose our Smooth Cast 65D.

I was looking for all the latest techniques on casting from clay sculptures, I’ve been away from it but now back and I came across this video….. outstanding!!! Thank you! Look forward to learning more about casting, mold making etc…. Funny though … sculpting is a thousand more times easy for me than casting hahaha I thought it should feel the other way around lol Thanks again

This is correct. The same Brush-On rubber mold process was performed on the clay original to created the plaster master copy.

so this is what actors and producers use in the movie! thank you for showing me

Beautiful

You could use a pourable rubber such as our Vytaflex and allow that to 'flow' over the surface before following up with brushed-on rubber.

Plast-Paste II is mixed 1A:2B by volume. Two cups of the paste (Part B) component were measured for one cup of the liquid (Part A) component. We did not explicitly show a second cup of Part B being dispensed in this video.

Nicely done

pays off when commercially having to make 50 or 100 of these statutes. For hobby craftsmen who make only one this is far beyond our budget

Amazing

Generally you would use a bed or wall of clay to divide the piece so you could mold one half at a time.

wow! you are so young in this! so honored to have met and talked to you at the concrete seminar!

thanks alot

wow the final

Good work

Thanks for the detailed instructions. One question, how many casts can you make from that mold. (how long will it last?)

you guys should have Frank Ippolito do some molding videos. his are so clean and detailed and i think he uses your products already so win win for all of us little guys. lol

Thank you!

Yes, it is Chavant NSP non sulfur plasticine.

You can cast urethane resin into the mold as long as you apply Universal Mold Release to the mold first.

The 2-part mother mold on the back helps keep the ears from becoming mechanically locked in the mother mold.

This depends on the casting material - but these are production quality molds.

nice job guys :)

Awesum!! Rock On!

Yes, as long as it is non-sulfur plasticine.

Art: Super cool. lol.TNX.

nice g funk era @ the end lol

It would be great if you had a package on your site with all the materials from the video. I do appreciate the list of steps and materials in the description.

I am trying to make 4 animatronic heads from molds. Can this DuoMatrix Neo be cut into/have holes drilled in it without shattering, cracking, or deforming? If not, is there another product that can be used with rotational casting that would be more fitting for this application?

I'm currently using the 25 and the viscosity even without the Thivex is rediculous its like peanut butter. "Brushing on" is implausible at best

You can check our website for a list of distributors. Our materials are available around the world. In terms of price, ultimately it will depend on the size of your project and the materials you choose. Feel free to contact us to discuss in more depth. You can get an idea for the price of the materials on our website.

I can now steal bronze busts and replace them with fakes! Thanks!

If you useing a porus material such as foam rubber. Would you have to seal it first before you spray the release agent on it?

Great video, question, Can I use the smooth cast 320 just around the walls, I mean not full solid casting? I want to save material and that way I use less resin

A perfect replica! Thanks for sharing your knowledge on making a mold.

I have a moldel where you just can't pull the rubber mold off like a mask. I have a main large ball with 4 arching tubes/scrolls protruding from the top that meet at a small ball: {Like a viking helmut that has 4 horns that arch up and meet at a ball at the top center above the helmut for a visual example} How do I get the rubber mold off of that and still keep the form in the mother mold without the wax filling in behind the rubber in order to make a loss wax cast? I know I will have to cut it to make parting lines I am assuming, How do I keep it together after and aligned after I put it back into the mother mold? Do I have to glue it back together before recasting the wax?

Great tutorial. What is the aproximate cost of all of the materials used in the video?

A list of distributors is available on our website (smooth-on [dot] com).

Can a burlap or fiberglass matte layer be added when brushing on the Plasti-Paste II support shell? I'm concerned with the strength of the shell using Plasti-Paste II alone.

About 4 layers is usually sufficient

👏👏👏👏👏👏👏👏👏👏👏👏👏

What were the steps to create the bust - is it sculpted in clay then molded into a plaster or a resin ? is there a video you can suggest about creating the bust.

Hey guys great vid, my question is can this be used on pink foam? I work using pink insulation foam to make Dios and would like to cast a few in hydrocal. I was wondering if this would destroy the foam?

What is the difference between silicone and urethane rubber, what are the advantages of each.

What if i have a prop that cant be glued down? Just one half at a time until it dries?

Hmmm, just one question...which one is better for concrete casting: Brush-On or Rebound?

@guysytaccount You should have longer than 5 minutes to work with the material. Urethane rubber is heat-sensitive, perhaps an elevated working temperature made the material cure more quickly.

hello! not sure if you still answer questions here, but I have the red rubber rebound 25 brush on and want to mold an antique glazed ceramic teapot.. I cant seem to find a way to ask google if that paint will potentially be damaged from the process...? what kinds of things are not safe in rubber and silicone molds??

good

10:02.Is that a batman returns cowl fiberglass mold behind the guy?Let me know.thanks

I am making small resin toys from super sculpey. Which is the best mould product for these?

You can use sulfur free clay for your model.

Im in the process of reproducing a rubber boot for my 1952 Buick starter. I have experience in casting and working with epoxy eurethane resin just not rubber wich the part is. What do you recommend that will not tear easily, heat resistant and a flat black finish with the most minimal shrinkage?

20 steps?? I agree with lat6ish... video is nice, but I wonder, if I will not stay with gypsum mold (3 steps) or find another thechnology with silicone mold.. Anyway, thank you - at least is possible to see, that - in any case several layers has to be done, before work, sculpture has to be adjusted to remove from mold, usage of different colors is good idea. Have a lot of succesfull creations! Alex.

A minute in and there 3 products you don’t need, they just want you to buy it.

Could i cast with resin after doing this? and would the inside of it be smooth, Im planing on making a mask? thanks :) x

and the other have this : Hardness (shore A)= 33 +-2 ; Mixing Ratio(%) = 2~3 ; Viscosity (MPa.s) =25000+- 2000 ; tensile strength (MPa) = 4,0 ;Tear Strength (Kn/m)= 25 +- 2; Elongation (%) =450 ; Density (g/cm^3) = 1,09 ; Pot Life Working Time = 30-40 minute ; Curring time /setting time = 3-4 hrs (25°C); shrinkage rate (%) = 0,3

(when applying Rebound 25) -- If you are using a sulfur-free clay for the partition wall... is it ok if the clay dries out?

How you did pigment Brush-On 40? Maybe you using So-Strong Color Tints or Silc Pig Color system?

I just used rebound 25 to make a mold and after a day it's still tacky. My measurements were precise and i mixed really well. I'm not sure what went wrong.

It is best to secure the model somehow.

Please contact our tech department by submitting a ticket at smooth-on . com

Thanks for the video! Why are your rubber shims in a different placement than your mother mold seams?

Could you do this method using silicone, to produce a silicone mask from the rubber cast ?

Is universal mold release an option instead of sonite wax? Would vaseline work?

Sir, I have a small silicone toy and it is of skin color. I want to change the color of that toy to green. Please tell me how to do it and what will be required.

can i cast in concrete if making a mold with this method?

what quantity of smooth on does it take to create a mold the size of a human head including the 4 coats? And how much does it take to cast a copy? is a pint enough?

what about if the model is made of clay and stabbing it as violently as you are with a thick rubber on a brush would ruin the model? is there a gentler way to go about it?

I already asked this in another product vid, but can the model be made out of modelling clay? Thank you

smooth-on! you have a store branches in phillipines?

hi, can you use this method and materials on a wet clay model? would a sealing agent need to be used such as petroleum jelly on the model to seal in the moisture before brushing on the rubber? thanks

so how much would all of that cost? im looking into making slush molds for latex masks.

How can I add silicone if my silicone mold already cured? I missed some spot. Thanks

Is it possible to use one layer of rubber only to, let's say, paint the inside of a 3-D printed model to act as a buffer for another object that will go inside that one? How durable is this rubber?

ممتاز ورائع ومحترف

This hollow technique can be done with Smooth Cast 300?

will this material work over a plastilina clay bust?

can the duoMatrix NEO be used for a mask

Did you seal the seam of the rubber mold before you put it in the plastic shell?

also how many layers of rubber does it need? thanks

Im looking to create some Jason Vorhees head and shoulder busts. I need them to be very durable. Could I use oil based clay to sculpt the bust, spray with relief agent, apply the liquid rubber as shown, apply another layer of relief agent, use fiberglass resin and hardener to create the two half support shells, and when the rubber mask is put in the support shell add another layer of relief agent to the inside and fill with fiberglass resin and hardener to make a true fiberglass bust? Or would this be too tedious and complicated and time consuming?

how thick should the silicone glove mold be?

Is the Thi Vex a replacement for the Cab-O-Sil mentioned in this video. the thickening agent for mold max stroke?

Hi there. This method could be used to make a mold for a Star Wars Stormtrooper helmet right?

Would this be a good method for making Halloween masks? Or just solid busts?

👍👍👍

At 04:25 you say "Use modeling clay to make support parting shims". Is this plasticine?

Is there a way to clean the brushes you use? Or are they totally destroyed after each layer?

Can u make another mold from mold

what is the model made of? is it clay - and is it fired. I want to make a mold of a clay sculpture - but it's not fired as it has armature inside... can I make a mold of an un-fired clay piece and does it need to be dry or leather hard?

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Is it possible to use the brush on rubber on human models?

what song is this haa i like it

What kind of sealer did you use