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 (35.27 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.

We used SirayaTech Fast Smokey Black to print our masters. After a lot of research, we decided to try the SirayaTech Defiant 25 silicone to make our first master molds rather than fuss with other methods to prevent cure inhibition. IT WORKS. No inhibition. And as a total bonus, I messed up and poured some of the Defiant 25 in a previously made dice mold (BBDINO 20A Silicone) and the die came out CLEAN and I have now made squishy dice without weird mold release!Highly recommend this silicone for making molds for 3d printed masters.

As a small company prototyping a variety of products that require platinum cure silicone, this silicone formula GREATLY simplifies our processes and ensures high degrees of success when casting silicone against resin molds. For many, printing in resin is the go-to method for making cost effective high quality molds for casting soft rubbers, either by using the printed resin object as a master to make a silicone mold, or by pouring directly into a printed resin mold. We have tested this silicone against Siraya tech Fast, Blu, and Build resins and have found that they cure properly and consistently against fully cured resin. This is something we have been needing for years!While we have not rigorously tested the mechanical properties we have found that for most purposes it is on par with other similar platinum cure silicones in terms of overall strength and tear resistance. Truly great stuff! Can't wait to see what's next for the future of this company as I just love their products for their quality, consistency, variety, and innovation.

This works great for my uv resin prints. Only thing is there are micro bubbles that other brands don't have.

I've been using this silicon for making resin molds for over a year and have had great success with it. Easy to measure and work with. Recommend degasing with a 3CFM, or above, vacuum to eliminate the risk of bubbles. Cures within 4-5 hours.

I make dice as a hobby and needed to make a new mold. Worked fine with my old 3d printed masters and perfectly captured all the details of the numbers with no tear-out when demolding. I forgot to check the cure time and was happily surprised to see the mold had cured in 4 hours, saved me a lot of expected waiting time since most silicones take 24 hours. Highly recommend.

I am 3D printing and make silicone molds of the print.For a while I am trying to find a way to prevent the infamous "Cure Inhibition". The silicone does not cure (remains semi liquide... an unholy mess) when it gets in contact with certain chemicals, even when they exist only in trace amounts.Siraya claims that their silicone does not have this problem. IT DOES !I tried "Inhibit X" does not work as expected.I tried "Acrylic Spray", it will cover up details... not usable.But there is a solution and I am using it now for several weeks.I am using Anycubic Tough 2.0 (other resins may be different) and after UV post cure, I put the parts into an oven at 60C for several days... probably 2 days is enough. Note, that some cheaper resins will crack at high temperature, Anycubic Tough 2.0 does not.I can make silicone molds using these 3D printed parts, without any cure inhibition. I have now tried 4 different brands of silicone and they work all well what cure inhibition concerns.This Siraya silicone is not any better than any other type of silicone I have used.

Best platinum silicone I've ever used (which compares to a LOT of brand).1) THIN. When they say self-degassing, they mean it. This is the lowest vicosity silicone I've seen, probably lower viscosity than the resin.I still vacuumed (keep in mind its a lower work time) and this stuff had already fully degassed before chamber even reached 1psi~ and only expanded 50%. Nearly as fast as watching boil.2) No cure inhibition just as advertised. Treated the parts as specified (which is normal process) and had no inhibition, even in the tiny recesses/overhangs that usually as the nightmares (less UV post curing perhaps)3) The low viscosity also helped pouring a very cleanly.The downsides i could find, were the shore level and the lack of bulk options. Shore 25 is a bit stiff for my needs. Maybe after this is a overwhelming success, alternate shores or a thinning agent will be made available.Gallon units or larger please. 2x5kg jugs would be sufficient.