BBDINO Silicone Mold Making Kit, Super Elastic Liquid Silicon for Mold Making, N.W. 21.2 oz, 1:1 by Volume, Jade Green, Ideal for Casting Silicone Molds for Resin/Plaster/Wax/Jewelry etc.

I have used silicone casting compounds on and off since using Dow/Corning Silastic circa 1990. I really, really like this product. Of the compounds I have used, this is the easiest-pouring, with low viscosity. This makes it easy to mix, the pour gets into tight parts of the mold, and any bubbles rise quickly to the top and pop. When mixed and setting, the product is clear, so you could see any bubbles if they were present. All previous silicone mold compounds I have used tended to trap bubbles. I would recommend a bit more than the 5 hours they say for setting time, and the surface may be a little tacky for a few days. Their instructions list things that can interfere with setting up (a severe problem with a compound I used previously). My mold forms were wood topped with clear acrylic spray to seal the surface, which did not interfere with setting. I used Sprayon MR311 Dry Release Agent (McMaster Carr) to keep the compound from sticking to the mold, with no apparent effect on setting. Without mold release, this compound will stick to molds made from the same compound. The mold detail is fantastic: it can reproduce the grain of wood.

I do a lot of 3D printing, but I needed to make a part that was both flexible and durable that I couldn't 3D print. Partly because of the shape, and partly because my printer can't handle super-flexible filament.I saw this stuff on Amazon and it seemed like it might work, so I ordered the small kit. I then 3D printed a mold in PLA, then coated the parts that needed to be smooth in XTC-3D epoxy. For the parts where surface didn't matter, I just left the raw PLA, layer lines and all. Because of the odd shape, I had to make a 4-part mold that could be screwed together.Once the epoxy was dry, I mixed up a batch of this BBDINO silicone, being careful to be as precise as possible with measuring. After mixing thoroughly, I took a 60ml syringe and sucked up all the silicone mix and then squirted it through the access hole in the top of my mold until it started coming out of the vent holes.At first it went pretty well, but after a couple minutes the silicone started seeping through the joints of the mold. I figured that might happen since this stuff is pretty thin - which is a good thing for getting it to flow into all nooks and crannies of the mold, but I should have done a better job sealing it. I made a frantic effort to tape up the seams to try and stop the leaks. Fortunately, it worked for the most part. But because a little bit leaked out, I didn't have quite enough to fill to the top anymore, so I quickly mixed up a second small batch and injected that as well. No big deal. I left the syringe sitting in the filler with a little excess in it so it would top off the mold if any more leaked out as it cured.Unfortunately, I got a little impatient and pulled the syringe out about an hour later, before it was completely cured and the "plug" for the hole pulled out with it because it was still soft. It didn't hurt anything in the end, other than to leave a slight dip in the finished surface instead of a plug that could be cut flush. Lesson learned.I couldn't wait to see how it came out. The instructions say to wait 5 hours before demolding, but I did it after a little more than 4. It was perfect! (other than the dip mentioned above). In order to completely remove it from the mold I had to stretch it around parts to get it loose. It's quite durable! I had to stretch quite a bit and it showed no signs of tearing. There was a lot of flashing from where it had leaked into the joints of the mold, but that was easy enough to trim off. They even supply a tool for doing so, though I didn't try it.It picked up every detail of the mold, including of course the layer lines. I had no trouble with it sticking to anything. Even the rough layer lines of the PLA. It came out of the syringe and mixing cups easily too, just by pulling on it.I have to say I am thrilled with how things turned out. I will definitely be using this stuff again if I need to make more squishy parts.

Absolutely love this silicone! So easy that even a beginner can use it and the molds come out perfect every time!

It works but its not that much coverage. I wish it also had better instructions

Best mixed by weighing each part. The mold must not be made of rubber. Drys firm in 2 days.

Did everything as advertised

I love this silicone. I’ve bought it several times now and each batch I love. It’s been great for capturing the finest details in the items I’m casting. Excellent, highly recommend.

Hard to demold. And it tares easily. I wouldn't recommend it for big projects as it's too expensive.