How to make a Rubber Mold with Smooth On for Concrete

In this video I will show you how to make a rubber urethane mold to make decretive concrete pieces using a product called Smooth On. The best part is that you can use this product to make mold for what ever you want! Concrete, plaster, pot metal, chocolate, candy and even molds for human skin! Take your creative mind to new heights!!!

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PRODUCTS AND TOOLS I USED:
-Smooth-On VytaFlex 20
-Smooth-On VytaFlex 30
-25lbs. Cement All
-Flow Control
-Milwakee 18v Drill
-Small Mixing Paddle
-Bucket trowel

FILMING EQUIPMENT I USE:
Rode mic
Camera iPhone 8
iPhone Lens kit
Editing software: Adobe Premiere Pro CC
Gimbal DJI Mobile 2

Michael Builds
P.O. Box 700391
Plymouth Mi. 48170

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[rogermccaslin]

I've built hundreds of molds - fiberglass, urethane, silicone. Smooth-On makes good products.

Here's a couple of tips:

When pouring, hold the container high above the mold (15-20 inches) and pour slowly. What you want is a thin stream of urethane or silicone. This will help release entrained bubbles.

To get a good approximation of the volume of an oddly shaped mold, fill it with play sand and then pour the sand into an appropriately sized measuring container like a Mix-n-Measure bucket. You will find the volume of mixed material within a percentage point or two.

[vernonvinson]

No worries about the tail break... they grow back!

[patglenn]

There's actually a good reason for using the "right" modelling clay. It's not so much a concern with urethane, but casting silicones will react to the presence of metals. (They wont cure properly.) And latex will go hard if you use a clay with sulphur in it. (That's how rubber tires are made.) As well, latex will discolor in the presence of some metals. (Not really a big deal, but nice to know.)

[ksramos]

“Binge watch”. Dude I haven’t done one project but I feel like I can go to Home Depot right now and make anything. Thanks. I’m so trying some of these projects.

[daviddickmeyer]

Put a rounded over needle or tiny brad in your exacto holder and use that to cut the clay from around your model. It works much better than the knife blade.

[kmh]

I knew there had to be a product like this, I just never ran across it, so, thank you for the video!

[raughboy]

This is a hell of a product especially becasuse if you make dioramas you can make your own molds for rocks that would probably outlast ones you buy

[reuma]

Thank you again for taking the time to make & share your videos with us, fork I love them.

[neatcool]

Most molders put a lip of wood on the end of the wood boards, arrange them like he has them and use C-claps to hold the boards together. Then molders put thin strings of clay in the cracks to seal it. I've molded since 2000, when I started, the guy at the supply store told me to use Vaseline as a general all around release and sealer wherever needed, I've used nothing else since, but WD-40 should be a fine substitute.

[ray]

Looking forward for that sweater that says "come on!"

[freedomhard]

Man I've been up all night binge watching your videos! Love them.

[terrijuanette]

Instead of going to the trouble of sculpting around your piece, would it be easier/less time consuming use a pasta machine (I have one I got for crafting) to 'roll out' a uniform thickness and set the piece on the clay pressing down slightly to eliminate gaps. OR....adding the clay to the bottom of the piece THEN putting it on the board and pressing down - whichever works best. It seems like it would be easier to me. I'd be sure to make the 'pasta clay' the same size as the base.

[barrycondicasting]

Well done! I’ve used smooth-on products for 30 years. They have more products than you can count for any project. Read and follow directions and they work every time. Build on!

[karinasamaniego]

I could just die. I didn't know this stuff existed. I'm going to go nuts when things get back to normal. I have so many projects imagined in my head now. I know how to finish off my porch, gonna build a concrete bar in back after we build the back deck and no telling what else. So glad I found you!!!! 😍😍😍

[kokaneeoutdoors]

Mike I have used Oomoo (By smooth on) for molds, but if you need to in a pinch you can use pure silicon caulk mixed with corn starch. It is cheap and gives pretty good definition, if you can stand the smell lol

[Bettyluv]

So happy I stumbled across this video...this will help me a lot with my next project...Thank you! ...and you're hilarious!

[nickbutler]

F.Y.I. a watered down P.V.A. wash will seal most porous surfaces and dries very quickly. Sorry if I am stating the obvious to fellow mould makers. but for newbies it's a quick tip and helps eliminate some of the bubbles on the mould surface. Yep I spell Moulds with a 'U' cos I am a Brit. :)

[grimm]

1 video in and I subscribed (with notification ON) this guy is the type of DIY I can relate to. 👍

[milt]

That is awsome i I also learned about smooth on a few years ago but was afraid to try it because the videos that I saw for making silicone mold had you using a vacuum chamber and I didn't want to spend all the money thanks Michael now I know you can do it without all that crap

[gotbikes]

Nobody ever ripped this guy off!! He's gonna always find the easiest/ cheapest way to compete ANY project!!