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WORKBENCH: RTV brands
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TOPIC: WORKBENCH: RTV brands
#15045
WORKBENCH: RTV brands 8 Years, 2 Months ago  
And in keeping with jackattack's suggestion under the Workbench thread in the Website forum, here's my first.

I've used both the Blue stuff from Micro-Mark and OoMoo from Smooth-On for making silicone rubber molds. Bot have given me excellent results for 1:1 mix silicones, althoug hthe Smooth-On seems just a tad bit stronger - say 40 Shore as opposed to 39 Shore for the Blue. Not that those are the actual Shore strength readings, but just as an example. Price was roughly comparable, @$25 for a one-pint bottle of each, parts A and B.

I'd be interested to see if anyone has other ideas regarding what brand of 1:1 silicone rubber they use.

I'll be back later with resin and paint stuff. I'm at work and the boss just walked by my cubicle - with a curious look on her face about all that key-tapping going on in there!

See ya!

Jim
jkratzer
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#15046
WORKBENCH: RTV brands 8 Years, 2 Months ago  
I have been using Alumilite's RTV, the two different types are the Quick Set Rubber and HSIII. I like HSIII much better than the Quick Set, much better shear strength, and good for undercuts, but the QS has some uses, if you are making a floor type piece the HSIII is much to elastic and can cuase sags in the large flat bits.

I use this mainly becuase i have easy access through it being sold at two stores near me, a FLGS, and a FLHS.
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More Sci Fi Please, request a DEAD END for Sci Fi Passages
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#15047
WORKBENCH: RTV brands 8 Years, 2 Months ago  
Don't go gettin' canned, Jim!

I've used Alumilite, castin'craft, and another off brand RTV that I can't remember the name of.

The Alumilite worked much better than the catsin'craft stuff you get from Michael's. It was sturdier from what I recall.

There was, however, an "off brand" that I picked up in Michigan at a LGS called "Old Guard Hobbies". It was on Ford Road in Garden City. weaverjk is probably familiar with the store. This stuff was the best. Really heavy-duty RTV that could stand up to a lot of abuse. Wish I could remember the name of the product.

A couple years have passed since I've played around with resing and RTV but at the time, I was keeping pretty good shop notes on the outcomes of my mixtures. Still have my log buried somewhere on my workbench. Maybe I'll dig it out tonight and share some of the notes with you all.

It's amazing to see how much money you can drop on the "professional" products--good RTV that can be vulcanized without turning into a big, gooey glob. I learned alot about how many silicones tear easily but resist heat really well, and how "sturdier" RTVs hold up well to flexing but don't do well with heat sometimes. Trade offs, eh?
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#15048
WORKBENCH: RTV brands 8 Years, 2 Months ago  
What's an RTV?
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#15049
WORKBENCH: RTV brands 8 Years, 2 Months ago  
pf -

RTV stands for "Room-Temperature Vulcanizing" silicone rubber; it's used to make molds for casting resin models. It's also been used for casting metals, but it HAS to be a high-temp-resistant compound.

BTW: off-topic, but important to you and me. I was able to modify a couple of the drawings in TileSystem so I can use them on modified DF pieces. As you may or may not know, I'm known on the DF forum as the king of the DF butchers. I'll cut up a DF piece in a minute to make a custom-sized piece or a modification for a specific purpose. I was able to use Gimp to modify the drawings and the photo for a Fantasy T-passage. If you like, I'll post them back here for you to see; if you're willing to wait until I can get it together, I'll put them up for you on my Web page. I AM planning to get the page back up.

See ya!

Jim
jkratzer
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#15050
WORKBENCH: RTV brands 8 Years, 2 Months ago  
Sure, post the pix!
pfworks
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#15051
WORKBENCH: RTV brands 8 Years, 2 Months ago  
Sure, post the pix!
Wilco, eventually. I still have to re-learn Front Page, or SOMETHING to do a page with!

See ya!

Jim
jkratzer
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Jim Kratzer, a/k/a The Mad Yank
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