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  1. Jawafive's Avatar
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    Apr 20, 2009, 8:19 AM - Smooth-On resin? Need some help/info #1

    I've got some molds I made out of MoldMax30 and I need to cast the resin pieces. I was looking at getting the Smoothcast 310. Anybody worked with it before and have any suggestions?

    -Matt
  2. RPF Premium Member Skaught's Avatar
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    Apr 20, 2009, 8:25 AM - Re: Smooth-On resin? Need some help/info #2

    I've used 300 to slush cast and normal casting. What kind of advice do you need?

    Scott
  3. Jawafive's Avatar
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    Apr 20, 2009, 8:30 AM - Re: Smooth-On resin? Need some help/info #3

    I guess I need a recommendation more than advice. Thanks for your input!
  4. RPF Premium Member Hotshot's Avatar
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    Apr 20, 2009, 8:41 AM - Re: Smooth-On resin? Need some help/info #4

    300, 305, and 325 are all my stand-bys. 1:1 mixes, bright white (325 is a hazy clear, awesome for coloring)

    Just be sure to wear a good mask or respirator, cause thus stuff can build up in your system pretty bad over time.
  5. Jawafive's Avatar
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    Apr 20, 2009, 8:41 AM - Re: Smooth-On resin? Need some help/info #5

    Thanks!

    I'm this is only a one time usage thing.
  6. RPF Premium Member Skaught's Avatar
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    Apr 21, 2009, 1:15 PM - Re: Smooth-On resin? Need some help/info #6

    Hotshot said: View Post
    300, 305, and 325 are all my stand-bys. 1:1 mixes, bright white (325 is a hazy clear, awesome for coloring)

    Just be sure to wear a good mask or respirator, cause thus stuff can build up in your system pretty bad over time.

    Really? Huh...better not take advice from me then.

    Not much too the stuff. Just mix up equal parts, pour it in, and come back in 10 minutes. With slush casting, I pour twice so it's easier to manage. Too much and the weight of it stops to glop around inside the mold before it sets, resulting in an uneven interior. I wait until the first pour stops moving, but before it's completely set, then pour in the next layer. The second pout seems to cure faster, whether from the heat of the curing first pour or because the chemical reaction in the first pour affects the second, or both, I don't know. But since the second pour is just adding thickness, the quicker the better.

    Scott
  7. LeMarchand is offline LeMarchand
    Apr 21, 2009, 3:17 PM - Re: Smooth-On resin? Need some help/info #7

    I use 300 for smaller casts as it kicks fairly fast and 305 for bigger molds. Make sure you stir/shake part B wel before mixing. Not stirring part B properly before adding a+b together can reult in uncuring resin that will kill your mold (trust me, i have been there)

    If you don't have the option to degass your resin prior to casting or do pressure casting and you decide to use 305 or 310. Shake can B firmly and let it be for 30-45 minutes. You will then have a good part B and most of the bubbles that have been introduced into it will have risen to the surface.

    Personally i love this resin.

    Cheers,

    Marc
  8. RPF Premium Member stormtrooperguy's Avatar
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    Apr 21, 2009, 3:19 PM - Re: Smooth-On resin? Need some help/info #8

    for slush casts i always use smoothcast roto. the 3xx series is too brittle for my tastes. i've dropped roto helmets onto concrete and at worst had a minor chip, usually nothing.

    solid stuff i usually end up using roto as well, since i have it. i can toss, say, a firefly message recorder across the room without damage
  9. LeMarchand is offline LeMarchand
    Apr 21, 2009, 3:26 PM - Re: Smooth-On resin? Need some help/info #9

    Is the smooth-on resin good for regular casting too? How does it compare to their 'Task' series?
  10. Kwally89's Avatar
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    Apr 21, 2009, 3:37 PM - Re: Smooth-On resin? Need some help/info #10

    tk7602 said: View Post
    for slush casts i always use smoothcast roto. the 3xx series is too brittle for my tastes. i've dropped roto helmets onto concrete and at worst had a minor chip, usually nothing.

    solid stuff i usually end up using roto as well, since i have it. i can toss, say, a firefly message recorder across the room without damage
    A lot of people use smoothcast 300 for slush casting, but I have always loved smoothcast roto. It is VERY easy to work with and you can pull great casts with little effort. If you are looking to do solid pieces, I like smooth-cast 325. It has a short pot life, but you can demold the casts in around 10 minutes.
  11. RPF Premium Member Skaught's Avatar
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    Apr 21, 2009, 3:45 PM - Re: Smooth-On resin? Need some help/info #11

    I've used 300 for both slush and normal casting. I dropped one of my IG-88 heads and it bounced with no damage. And these are 1/8" thick. Solid stuff.

    Scott
  12. fettster's Avatar
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    Apr 21, 2009, 4:30 PM - Re: Smooth-On resin? Need some help/info #12

    hi Matt, is this for what i think it is?
  13. Jawafive's Avatar
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    Apr 21, 2009, 7:35 PM - Re: Smooth-On resin? Need some help/info #13

    Actually it's not, lol. I've got some SmoothCast 300 on the way for these pieces. If it will work for what you requested I will give it a try.

    -Matt
  14. RPF Premium Member Hecubus114's Avatar
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    Apr 21, 2009, 9:25 PM - Re: Smooth-On resin? Need some help/info #14

    is it for what I think it is, LOL???
  15. THStudio is offline THStudio
    Apr 21, 2009, 9:35 PM - Re: Smooth-On resin? Need some help/info #15

    You can use Smooth Cast 320 as a surface coat for Roto resin castings. I've done that before with great success. Just dont waste time between layers so everything adheres. Didnt have delamination, or any problems.

    The resin why I did that was to create a bit of a harder surface, which still allowed a great deal of flex. Normally, for me the surface of roto pieces are too soft, as the resin cures softer than what you might be used to.

    Tyler
  16. Jawafive's Avatar
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    Apr 21, 2009, 9:36 PM - Re: Smooth-On resin? Need some help/info #16

    Hecubus114 said: View Post
    is it for what I think it is, LOL???
    Both of you want the same thing

    I'm workin' on it I promise.

    Thanks Tyler for that info!
  17. fettster's Avatar
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    Apr 22, 2009, 6:08 AM - Re: Smooth-On resin? Need some help/info #17

    The Batman said: View Post
    Both of you want the same thing

    I'm workin' on it I promise.

    Thanks Tyler for that info!
    If your thinking what Im thinking then Matt is thinking he thinks he knows what we are thinking. I think
  18. Yodajammies's Avatar
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    Apr 22, 2009, 8:01 AM - Re: Smooth-On resin? Need some help/info #18

    Not to thread-jack but, I've had a lot of experience with smoothcast300 and found it to be a bit brittle. Does smooth on offer a product with properties closer to that of a frisbee? A lower durometer rating?
  19. Jawafive's Avatar
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    Apr 22, 2009, 8:11 AM - Re: Smooth-On resin? Need some help/info #19

    fettster said: View Post
    If your thinking what Im thinking then Matt is thinking he thinks he knows what we are thinking. I think


    Brain hurts!
  20. RPF Premium Member CSMacLaren's Avatar
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    Apr 22, 2009, 9:27 AM - Re: Smooth-On resin? Need some help/info #20

    How workable is the roto material? If you have to cut out, say, eye slots, does the material sand well or does it remain squeaky, rigid and intolerant to any modification?

    Also, how heat resistant is it, or will things start to "melt" if worn too long out under the sun?
  21. RPF Premium Member Hotshot's Avatar
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    Apr 22, 2009, 11:49 AM - Re: Smooth-On resin? Need some help/info #21

    The roto's awesome. It sands up and cuts as well as the 300 series. It stinks though!!!
  22. RPF Premium Member Skaught's Avatar
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    Apr 23, 2009, 9:50 AM - Re: Smooth-On resin? Need some help/info #22

    CSMacLaren said: View Post
    How workable is the roto material? If you have to cut out, say, eye slots, does the material sand well or does it remain squeaky, rigid and intolerant to any modification?

    Also, how heat resistant is it, or will things start to "melt" if worn too long out under the sun?

    I have a patch of 300 that I spilled on my outside work area. It's been in the sun for abotu three months now. Other than turning yellow, it's as hard as it ever was. I've chiseled some of it off, but it takes a thin layer of concrete with it.

    Scott
  23. RPF Premium Member stormtrooperguy's Avatar
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    Apr 23, 2009, 10:36 AM - Re: Smooth-On resin? Need some help/info #23

    Yodajammies said: View Post
    Not to thread-jack but, I've had a lot of experience with smoothcast300 and found it to be a bit brittle. Does smooth on offer a product with properties closer to that of a frisbee? A lower durometer rating?
    that's the smoothcast roto

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