Siraya Tech Defiant 25 Platinum Silicone Mold Making DIY Kit, Food Safe, 25A Hardness, Ideal for 3D Printer UV Resin, Easy to Stop Curing Inhibition, No Coating, for Casting Epoxy Resin (35.3 Oz)

Let me start out by saying I rely on silicones and casting products to make a living. I have tried several 15-30 durometer silicones and had always had strange problems with them. Having said that, this silicone did not have any of the issues that other *more costly* silicones had that were comparable. The fact that I have also had zero cure inhibition issues when used in conjunction with elegoo ABS like 2.0 (that is my go to resin for my 3D printer) is just like the cherry on top of an already great silicone. It degasses extremely fast which speeds up production, while having ample work time when making smaller molds. I have used both the 15 and 25 duro varieties and have been equally impressed with both. One last thing worth noting is that when I had used other comparable platinum silicones that are a 1to1 ratio I seem to get a considerable amount of shrinkage. This has not been the case with the siraya tech silicone, even when using the molds repeatedly in a heated pressure pots I have not had any noticeable shrinking in any of my molds. Lastly, in my opinion it is very affordable, to be honest at its price point I didn’t expect to be this impressed by it. It is very seldom that I use a product that checks all the boxes, I wouldn’t change a thing except maybe making the product available in larger kit sizes and expanding the durometer range to include maybe a 45. It has quickly become my go to silicone for smaller molds that require some flexibility. These are my views and opinions and your mileage may vary.

This stuff is fun to use. I made some chocolate molds with it, and I'm really pleased with the resulting chocolates. It molded around PLA (3-D printed models) very well. It kept so much detail that I was able to print the models on a holographic surface, which transferred to the mold, which transferred all the way to the chocolate and made excellent party favors. I used a vacuum pot and vacuumed the mixture 3x before pouring to get all the bubbles out. The working time is supposed to be 15 minutes, but it felt like it was starting to get gloopy around 13 minutes. I was working in a fairly warm environment at the time.

Works brilliantly. Takes mica pigment well and the self degassing is effective. Used for a few different projects now and it is quite durable when demolding/removing from form and is a good mix between stiffness and flexibility in general. Sets quickly while still allowing a good working time and gentle tapping/vibration should help any bubbles fully escape. Seems to handle small amounts of UV resin just fine although if you are casting a resin print I would recommend a topcoat just to be safe. Mixes well and cleans up just fine I should note too.

I went from idea to finished product in about 5 hours using this silicone! I was VERY skeptical that this would work without any inhibition, but there were absolutely no uncured spots in my molds at all when they were done (I used Siraya Tech "Fast" Navy Grey resin for the original). I poured about 1/4th of an inch of silicone for these small molds, and they were cured within AN HOUR. Literally the only negative I have is that I struggled to get all the bubbles out of these detailed molds - specifically talking about the spots where bubbles formed on my resin original due to surface tension, not the floating bubbles in the silicone - and the silicone was too thick to get them out by tapping the mold box or poking them with a toothpick. That's true of a lot of silicones I've tried though, and the pros waaaay outweigh the cons here. Best of all, the molds come out clear enough that you can use UV resin in them. Very excited about what I'll be able to do with this material!

Okay so my second time trying to write this review is for some reason Amazon itself crashed on my mobile device. The material when compared directly against an off-the-shelf silicone fared better. The off-the-shelf silicone being cheaper and more plentiful had a far harder time being removed from the test object. Now unfortunately given the cost of this material I've not done much testing with it as much as I would like to. Because to do a lot of good testing I need a rather large substantial source of it. And in casting you're going to use a good quantity. Unfortunately what you get in the containers is enough for maybe 2 good casts. So quantity versus cost is not in line with what I would like. That's not necessarily A fault of the product itself it's just that I would like to see the company offer a larger container of this stuff. Without you know a crazy hiking cost. Now the primary thing that I didn't like about this material and it goes as an unresolved issue. Was of the two times that I have used it in testing the very first time it took several days for it to cure and I'm not really quite sure why. I don't believe the substance requires a UV light here. The second time I did expose it to UV just in case. But I do not know that that had anything to do with it. I'm assuming it has something to do with external ambient temperature and exposure to atmosphere. But the second time that I used it I had better results and it did you overnight. I hope to get more casting in in the future and to be able to return better results and even perhaps a warning if possible to those who want to use it regarding specifics of what is necessary to get a Best use cure time.

Really high quality silicone. I don't use silicone often, but this has been my go to. Hardens well, and is bubble free. Mixes easy and the cure time is pretty quick.

Erfüllt meine Erwartungen.

3Dプリンタで成形したものを、大量生産と考え、シリコンモールドを初めて作りました。扱いやすく、とても簡単に作れました。リピートしてます。

Fantastico ottimo prodotto

Top spul geen bubbels en snel hard

Cures very fast, ready to use mold in 4h. Copy details very well and is very durable, also works incredible well will liquid printed resin pieces, I never have a silicone that work as good as this with that kind on pieces, no uncured areas close to the printed resin, is fantastic! The only thing I don't like very much is the shore it has, 25A make the molds a bit difficult to demold for some kind of pieces cos the silicone is a bit too rigid, but that the only point of it I don't like very much cos make my fingers hurt when I demold ceratin pieces, but it's absolutelly worthy 10/10, very recomended