Need Help on Mold Making/Casting

[Sandr]

Hey everyone, i am in the process of making a Pink Ranger helmet. I want to be able to make a mold and cast it several times. I need help with materials. Can anyone recommend a good silicon from smooth on to make the mold? and what resin i should use to make the casts? also how do i know how much resin to pour into the mold?

Thanks

 

[pitchforknumb]

Mold Max 30 is always a good option for molding. I've never had any problems with it. And for casting the helmet I usually use smooth cast 65d. It's a resin specifically designed for rotocasting. I usually do 4 layers of the 65d. You want to build up your thickness instead of trying to get it in one go.

 

[BrianDHT]

For something that size, I would go with a brush on mold. Rebound 25 is pretty good. You can also use Mold Max 30, like pitchforknumb said, and thicken it up with Thi-Vex.

 

[zoal]

I'll second Rebound 25 with Thi-Vex. Thi-Vex to thicken up your layers is a life saver i cant recommend that enough. For casting I've heard Smooth Cast 65d has pretty low heat tolerance but i've no experience with it myself. I like using Smooth Cast 320 series.

 

[BrianDHT]

65D is nice because it gels before it cures. It's easier the get an even coating and you'll probably get less air bubbles than the 300 or 320 series.