Making a Brush-On Silicone Mold | Mold Making Tutorials, Part 1/2

[EpicSteamer]

I typed in RUBBER SNUGGIES and got sent here......

[pooponastick3214]

Can you reuse the excess silicone used to make the mold at the base that was cut off at the base if it is reheated and turned back to liquid? If not what is done with it?

[SmoothOnInc]

@pooponastick3214 It cannot be reheated or liquified. This material is inert and is disposed of.

[BlueGirlHaley]

can you do this with neoprene tails? You see, I'm trying to make a silicone mermaid tail that I can swim in. so, would this work for it? Thanks!

[SmoothOnInc]

@BlueGirlHaley I would recommend casting the scales first, then adhering them to the neoprene with Sil-Poxy, as neoprene will inhibit platinum silicone.

[BlueGirlHaley]

@SmoothOnInc your videos have been very useful! thank you!

[japichic]

Is it really necessary to use a brush? Can you just pour the silicone into a cup to make the mold like with the OOMOOO 30?

[SmoothOnInc]

@japichic This mold rubber is too viscous for pouring. our Mold Star series is a platinum, pourable silicone rubber.

[stickydoyle]

where can i buy smooth on products in the UK? Are Bentley chemicals my only option?

[SmoothOnInc]

@stickydoyle Bentley should be able to provide you with everything you need, they are our largest distributor in the UK. Where are you located?

[stickydoyle]

@SmoothOnInc im based in Plymouth , a bentley chemicals rep visited my employer a few months ago, i was really interested is using your product for some of my own work , but never managed to talk about pricing and options.

[MamoTheta]

Do you dispose your brush for each layer?

[SmoothOnInc]

@MamoTheta In this case it it easier to dispose of an inexpensive chip brush than try to clean the silicone for the brush in between each layer.

[SHUZOBUS]

My friend and I were laughing so hard, because of how many coats she put on. Just when we thought she was done, she decided to put one more coat on. Then when we were at the end, we were like Oh yay, now we see what happen. Then we have to frickin click another link.

 -Thank You

[cooldog60]

I was begining to think you wee going to put 100 coats on.

[SmoothOnInc]

@cooldog60 This is a good point - it may be necessary to put more than 4 coats on, depending on the configuration and size of your original. The time spent in making the mold is more than a pour-on mold, but a lot less material is used in a brush-on application.

[out6of6my6mind]

Roughly how much of the rubber was used to make this mold? Would it be about the amount that you get in the Trial Size Rebound 25?

[SmoothOnInc]

@out6of6my6mind Correct, we used 1 trial unit of Rebound 25.

[barrycondicasting]

I needed a complicated job done quickly (architectural restoration at Trump Towers in Manhatten) and the guy I hired from your mold maker's list saved the day using this orange rubber. The molds he made were perfect and the moldings he cast were perfect.

[fortysevenprops]

Also, I had applied it pretty thick, will that also affect it curing? The flange that I had left had cured perfectly, just not to the buck. It's a pain to clean, but I want to remold it using Rebound 25.

[SmoothOnInc]

@fortysevenprops MDF should be sealed with a clear acrylic spray, such as Krylon Crystal Clear Spray. The primer may have been an inhibitor. Fumed silica will work as a thickener, but be cautious to have proper ventilation when using it.

[fortysevenprops]

I was casting a wood proton pack (ghostbusters) buck that I had made using Rebound 25. When the detail coat had cured, I had applied a second coat of rebound and left it overnight to cure.

When I woke up to demold, I found a lot of it had not cured, specifically where it had come into contact with the buck. The buck was made from MDF, and coated with grey primer. Is there a chance it caused it to not cure? How should I seal it so it will cure perfectly? Give it a light coat of resin?

[fortysevenprops]

@fortysevenprops Also, I'm going to use Smooth Cast 300 to rotocast this mold, will fumed silica be ok to thicken smooth cast 300? I want the shell to be about 1/8" thick when I pour and rotocast it. I'll be rotating it by hand, and filling any major depressions in the mold solidly with smoothcast 300 before rotocasting. What ratio is optimal for fumed silica to smooth cast 300 to ensure a good rotocasting consistency?

[yamila2068]

What about tje mold re;lease agent?

[michaelandymyers]

@yamila2068 silicone molds don't require mold release unless you are casting silicone into a silicone. They naturally give off mold release as they cure.

[SmoothOnInc]

@michaelandymyers True, silicone is self-releasing, but this is due to the material's makeup and not giving off any release agents as they cure.

[panikattak14]

@yamila2068 @tonbridgeguy silicone rubber has a habit of only sticking to more silicone, so usually a release agent is not necessary. UNLESS your subject being molded is sulfur-based (some clays) in which case you must apply release to prevent a chemical reaction.

[SmoothOnInc]

@panikattak14 Actually, a sulfur clay will react with silicone, even with a release. Sulfur clay must be sealed with an acrylic spray, and even then can inhibit platinum silicone.

[tonbridgeguy]

Did you use a mold-release agent first?