looking for flexible latex rock molds

I used molds from Bragdon Enterprises.  They are very flexible, shallow and some of them are pretty large.  Here's a link to the molds.  Click on the magnifying glass icons on the left to see photos.

 

http://www.bragdonent.com/smpic/item2.htm

 

If you call them, Joel can suggest molds that represent the type of rocks you want to represent.  They are not cheap, but the quality is there.

Ed

I don't know if this would work. Just a idea.

 

What if you took a piece if two inch thick pink foam board 3 or 4 plus feet at a time 7 or 8 inches high and dug out one side as deep as possible along a long piece. Different depths and angles. Try and make your own mold.

 

Then fill the different depths flush with plaster ( like dry wall mud)?

 

Just sitting here thinking??? I don't know if I'm explaining that well.

 

Larry

It's easy to make your own molds.  Just find a suitable rock to make the mold.  You can get liquid latex from a craft store like Michale's.  Select the side of the rock you want to make a mold out of and spray it with some water with a couple drops of dish washing liquid.  Using a cheap paint brush paint the surface and just a little down the sides.  You only need to go down about a 1/4 inch.  After your done put the paintbrush in a ziplock bag and let the mold dry.  You can speed the drying process with a hair dryer.  Paint five coats on your rock making sure you allow it to dry, but not longer then 24 hours between coats.  Once you have the fifth coat dry, paint on another coat and cover the mold with gauze type material.  I found mosquito netting at JoAnn Fabric.  Make sure you get the cloth covered.  After this coat dries apply another 4 or 5 coats.  When the last coat is dry carefully peal off the mold.  Spray the mold with the water mixture and pout in your plaster casting material.  You can wait until it sets up and peal off the mold or once it sets up enough you can take the mold and press it against the area you want to attach it to. If you already have plaster there wet it a little.  Hold the mold in place for a couple minutes and peal off the mold.

Ed, you might take a look at Eric's Trains video series. He details how to make tunnels in 8 videos plus how to make mountains in 6 video series. He includes the howtos as well as where to get the materials (I believe he uses Bragdons also). He uses a two part epoxy mix for making thin skin molds kind of like you describe. You can get to his blogs through the sponsor list. Ray

 I don't have anything else to add other than Jim P here on the forum used the Bragdon's and they looked great!

 I would just like to ask that you show the work so I can at least attempt to copy! You're layout looks like museum quality to me. I have been trying to follow your's, and many others here when you guys share. Jim Scorse's layout, I have not checked up on in a while either.

 Chris's, John Sethian's, etc. etc. Well John showed the wire railings in the last OGR!