March 9th, 2010
AeroMarine Casting Resin is a polyurethane polymer that frequently exudes an oily film as it cures. This film seems to dissipate a day or two after curing. It is also possible to prime the casting resin with Krylon Fusion spray paint before applying any other paint. If possible, let the object cure for a couple of days, then wipe with a paper towel. In some cases you may need to wipe the casting with a mild solvent or alcohol to remove any surface oils.
Some used paint the inside of the silicone rubber mold before casting the resin. The resin then sticks to the “back” side of the paint. This has the advantage of creating a chemical bond between the resin and the paint.
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March 9th, 2010
The best way to remove cured epoxy is usually with a heat gun. Home Depot sells some inexpensive heat guns for under $30- They look like a hair dryer but they put out much more heat. Avoid breathing the fumes of the heated epoxy.
A less satisfactory method is to dissolve the epoxy chemically. Methylene Chloride is the most effective solvent, but it evaporates quickly and is toxic. Jasco makes a paint stripper in a gold colored can that contains methylene chloride. It contains some other substances that make the methylene chloride cling better to a vertical surface and evaporate more slowly.
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January 29th, 2010
A customer called recently asking how large of the silicone rubber mold could possibly be made. I told him that the largest item I have ever seen made have been life sized palm trees. Actually I’ve seen quite a few palm trees molded in silicone rubber molds. Typically these trees are used in Las Vegas hotels.
Some times if you go into a hotel in Vegas you will smell something that reminds you of white glue. A lot of “real” tree leaves are preserved with a chemical similar to white glue- and the trunks of these trees are often molded in our AM 128 Silicone Mold Making Rubber.
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January 29th, 2010
We now stock a black rubber powder that is used to extend latex rubber molds. It looks like car tires ground up into a very fine powder. After you have brushed on a few layers of pure latex, you can use this powder to extend and thicken the latex. Currently we stock 1/2 gallon pails selling for $12. Larger sizes are available.
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January 22nd, 2010
Climbing walls in gyms have become very popular. We have a lot of customers making molds for climbing holds as well as making the actual climbing holds themselves. It’s a fairly easy process, since climbing holds are generally simple shapes.
The two products to use are:
- AeroMarine Casting Resin
- Aeromarine 128 Silicone Moldmaking Rubber
Although not necessary, you should also consider our Parfilm Urethane Mold Release. It will make the molds last longer.
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January 22nd, 2010
We are primarily an internet business but we do have a warehouse that stocks our products in San Diego.
It is open to the public Monday- Friday from 9am until 4pm.
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December 10th, 2009
You can run your old molds through a meat grinder to recycle old silicone rubber molds. Use the ground silicone to fill in the non critical parts of a mold such as the corners. This can save quite a bit of $ when making molds.
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January 6th, 2009
The title is self-explanatory. How can oil prices drop in half but epoxy prices remain unchanged? Epoxies come from only three major oil processors/refiners- We buy from all three, and none of them are able to explain why their prices are staying at all time highs. When we get an answer, we will let you know!
Update July 13, 2009-
Seven months later, oil prices are still substantially down and appear to be going lower. The oil companies still haven not provided a reasonable answer.
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January 6th, 2009
We saw this on the web:
QUOTE(herogear @ Nov 6 2007, 08:07 PM) 
I highly recommend http://www.jgreer.com/index.htm Way over smooth-on, TAP, or Poly-tech… His stuff is cheaper, excellent quality ( I’ve been using him exscusively for the past 3 years), & he usualy ships the next day. His prices WITH shipping usualy costs less than other places retail price alone…
His casting resin is basicly oderless, cure to an off-white, very stable, good set time, & durable. His silicone’s catylist is purple & smells like grape bubblegum… LOL I use those as well as the silicone 2-part putty, oils, & other products… Try him, you won’t be dissappointed. He also sells fiberglass cloth, resins, 2-part pour foam… Everything you need for armor/prop making.
Wolf
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December 30th, 2008
We make a lot of messes around here, so we are pretty good at cleaning them up!
We only use two products for cleanup, which makes things easy.
- For spills, drips, and leaks we use a spray can of carburetor cleaner from the automotive store.
- For cleaning our hands we use a product called “Fast Orange with Pumice”, also from the automotive store
I try to be as carefull as possible when working with resins so I try to avoid wearing gloves. This is because wearing gloves causes me to be unaware of messes I’ve made, allowing them to spread. I don’t recommend this for everyone, and my employees always wear gloves- but wearing gloves can really cause a small mess to grow.
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