Casting a perfect miniature with blue stuff

If you carve/cut small lines leading away from your model, the excess putty wont disrupt the mold, it will be pushed into the spew lines. I use toothpicks to do this

I like the idea of building a box for the mold support. Good Idea for the clamps to press the mold together. However, some things you might consider to create a better finished product. Pour channels. I know you're not pouring anything, but they will give you room for the excess putty. Mold alignment pins. Just push a stick into the bottom half around the part to create holes that the top half will fill when pressed in. The resulting 'pins' will help keep the two soft halves in alignment. Also, consider smoothing out the material on the bottom half before pressing the top down. Part of the reason they are hard to separate after cooling is the rough surface texture of the bottom layer. Finally, allow the blue stuff to cool longer, or even put the mold in the refrigerator to speed the cooling. You got a lot of your distortion from pulling the mold apart while the blue stuff was still soft in the center. Finally the music. Are we watching a diaper commercial?

Pro tip. Before you press in your second blob of blue stuff, use a pen or rod to press some dimples in the area around the part. Then when you press in the second part of the blue stuff it will fill in those dimples. This will create registration points for the two halves to lock into so that your two mold halves will line up better.

Just use Lego for the mound frame

Lego base and blocks work good for the mold edging too. If you have enough blocks you can make a lid press that fits like a glove too I only recently starting casting bits like this but its pretty simple. First few I made i didnt use any oil or lego blocks and a bit too much epoxy but the bits came out great once cleaned up. Each bit from their has gotten better and better. I mainly just make extra purity seals and other tiny bits that you usually only get a few of per kit. Decking out all my units like a mad man~

That music, that dam music 🥹

This is the best video for learning how to make the best blue stuff molds.

honestly this is the best method i have seen so far to make GOOD molds from blue stuff, great job and thank you for the idea! i will try it this weekend

I made a mess of one of my miniatures. Your frame is what I need. Thanks for showing this. I think I'm going to make a few from masonite, just picked up some clamps.

Awesome job! This is probably the best video i've seen on making 2 part molds with Blue Stuff/Oyumaru. I'm not 100% convinced Blue stuff is any different than Oyu. I've used both and if I didn't know any better I would say they are chemically the same. Except for the fact that Green Stuff does a better job of not sticking to surfaced. Still a great produce!

I am 5 years late, but thanks for the demo. Along with the comments, this upload is very helpful.

Thank you for a very encouraging video for me to have a go. And by it not turning out exactly perfect it demonstrated some pitfalls newcomers should watch out for. Very useful additional comments on here too. And they were right about the music 😉

wonderful, one of the BETTER instructional video's. Just what I needed. THANK YOU!

Bro, add a notch to any side of the box interior and you can match the halves up easier latter. Could label your molds while still hot also if your gonna make a master caste to re-use.

34 minutes of that music will drive everyone bonkers 🥴

Mold shell with lego blocks then it lines up really nicely

The music is so amazing you should make it louder next time

great video mate very interesting thanks

How precise are the parts, are they as precise as making them using silicone and resin?

Wish I could hear what you're saying, the music is too loud and made me freaking mental...other than that, a good video.