"Best casting material" Topic

Hello All

I just order some of the instant mold to try my hand at some very minor sculpting and molding/casting.

What are the recommended cheap ways to go ahead and try this: and any cons associated with materials

I have seen reference to green stuff, miliputty, and hydrostone used.

Thanks for any help in the matter

nothing that creates heat . instant mold will deform . resins are out . Hydrocal is cheap enough and sets quick

It depends on what you are making. I've used green stuff in very small pieces like 28mm arms or heads. The heat generated by hydrocal and resin depend on how much of the material you are using, but even something like a cubic inch might be enough to soften instamold.

I have used two part ribbon epoxy successfully. If you are making lots of castings of the same thing you will probably need to melt and remake the mold at some point.

I've used greenstuff and other epoxies, plaster and hydrocal.
Das Pronto airdrying modelling clay worked fine.

Tried it with acrylic caulking, which, as expected, didn't work that well.

Polymorph worked really well, but you must watch the temperature. (Instant mold/Oyumaru melts at 80 C and Polymorph at 60.) I'm not entirely certain why you'd use it, but I had to try.

Durham's Water Putty

For figures I don't have suggestions. For terrain, buildings, etc. Drystone by US Gypsum is a great product that is near in quality to dental plaster but costs much less. You can get it through Ceramic shops.

henrix
that polymorph stuff couple of questions
pouring resin
1 how flexible is it, and what about under cuts/detail level
2 can it be used for a two part mould
3 does it pour like silicon rubber