--- product_id: 339668414 title: "Smooth-On, Inc Mold Star 15 Slow Moldmaking Silicone Rubber - Trial Unit" brand: "smooth-on" price: "€ 145.21" currency: EUR in_stock: true reviews_count: 5 category: "Smooth On" url: https://www.desertcart.gr/products/339668414-smooth-on-inc-mold-star-15-slow-moldmaking-silicone-rubber store_origin: GR region: Greece --- # Smooth-On, Inc Mold Star 15 Slow Moldmaking Silicone Rubber - Trial Unit **Brand:** smooth-on **Price:** € 145.21 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Smooth-On, Inc Mold Star 15 Slow Moldmaking Silicone Rubber - Trial Unit by smooth-on - **How much does it cost?** € 145.21 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/339668414-smooth-on-inc-mold-star-15-slow-moldmaking-silicone-rubber) ## Best For - smooth-on enthusiasts ## Why This Product - Trusted smooth-on brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Shop wide range of collection of Casting Moulds from the house of Smooth on desertcart. Review: I've tried a lot of molding silicones from a few brands, and so far, this one's my favorite for a handful of reasons. 1. Long pot life means there's ample time to mix and pour before things start to thicken up on you. If you're like me, when you first start making your own molds, you'll find dozens of ways to screw things up. A nice long pot life means that if (or in my case, WHEN) things go haywire, you'll have plenty of time to fix things. Silicone isn't cheap, so mistakes can be expensive -- the wiggle room is nice! 2. Relatively quick cure time, especially given how long you have before the mix starts to solidify. I can come home from work, pour a mold, and it's ready to use with time to spare before I need to head to bed. 3. Platinum cure is always a plus. For mysterious reasons, I've had trouble with tin cure silicones and the material I usually cast (epoxy). I think post-curing tin-cure molds is supposed to solve part of the issue, but even when I've tried that, the tin-cure molds have left a slightly tacky, sticky film on the surface of my castings. I've had much better luck with platinum silicones, which actually seem to *improve* how my epoxy resin cures. 4. Low viscosity means you don't get bubbles as long as you don't overmix, and the trapped air in detailed molds doesn't have shove its way through super-thick goop to break free. In other words, unlike a lot of silicones, you can get excellent results with this one without using a vacuum degassing thing-a-ma-bob. The last thing is a plus/minus: This stuff is soft, but not insanely soft. The flexibility makes it excellent for intricate stuff because you don't need Hercules hands to get your casting out of the mold. However, really soft, flexible silicone like this can also cause some problems. So here are a couple tips I learned the hard way :). 1. If you'll be casting something in multiple layers, make sure you either place your mold in some kind of support shell -- a cup or a plastic bowl can work -- or make your mold with extra "buffer" rubber on the base and the sides. Why? Well, if you move the mold too much, those awesome natural silicone release properties can work against you and knock your layer loose, which means the next layer can ooze down the sides. Having something to make sure the soft mold doesn't get jostled makes all the difference. 2. On a similar note, if you're going to make one mold with lots of cavities, it's probably best to time things to everything is ready to be popped out of the mold at the same time. The flexibility means it's pretty easy to accidentally knock one casting loose while trying to remove another one. All in all, a really awesome product. Highly recommended! Review: I used this to mold ornate chess pieces and to make some cuppboard knobs in PU resin. It mixes simply and don't have to hurry (in fact I might look for a slightly faster version). I cast using a plastic cup and a paper cyclinder as a container and both worked fine and could be removed. neither of the masters (the resin chess pieces of wooden knobs) got stuck at all. The resulting mold has good, but flexibility but is fairly dense, the knob needed a split mold to get the bulbous part out. I cast with PU resin without any mold release spray and they came out of the mold easily and the level of detail was exceptional. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00ATDV5BQ | | Best Sellers Rank | #2,101,465 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #106 in Casting Moulds | | Brand | Smooth-On | | Colour | Multicolor | | Country of Origin | USA | | Item Dimensions LxWxH | 19.3 x 15 x 7.9 Centimeters | | Item Weight | 1 kg 90 g | | Item dimensions L x W x H | 19.3 x 15 x 7.9 Centimeters | | Item model number | SOMoldStar15kit | | Material | Silicone | | Number of Pieces | 1 | | Shape | Star | | UPC | 751635292413 | ## Product Details - **Brand:** Smooth-On - **Colour:** Multicolor - **Item dimensions L x W x H:** 19.3 x 15 x 7.9 Centimeters - **Material:** Silicone - **Shape:** Star ## Images ![Smooth-On, Inc Mold Star 15 Slow Moldmaking Silicone Rubber - Trial Unit - Image 1](https://m.media-amazon.com/images/I/312zvLTmNmL.jpg) ![Smooth-On, Inc Mold Star 15 Slow Moldmaking Silicone Rubber - Trial Unit - Image 2](https://m.media-amazon.com/images/I/41Axo7OP4YL.jpg) ![Smooth-On, Inc Mold Star 15 Slow Moldmaking Silicone Rubber - Trial Unit - Image 3](https://m.media-amazon.com/images/I/41CVouLzHBL.jpg) ![Smooth-On, Inc Mold Star 15 Slow Moldmaking Silicone Rubber - Trial Unit - Image 4](https://m.media-amazon.com/images/I/41E-1tKmGVL.jpg) ![Smooth-On, Inc Mold Star 15 Slow Moldmaking Silicone Rubber - Trial Unit - Image 5](https://m.media-amazon.com/images/I/41cTTntEZJL.jpg) ## Questions & Answers **Q: Are these pints? I am looking for the volume, not the weight and I can't seem to find it.** A: They are pint bottles. **Q: Is this enough to make a full set of rpg dice molds in small cups?** A: I ran out after 6 of the 7 dice. I used 4 oz cups and was barely able to make the six molds. The molds did turn out great, though! **Q: How well does this retain fine details?** A: It does a great job with details. **Q: What is the shelf life for parts A and B unmixed?** A: Hey mOWWck, the shelf life is about 1 year (usually slightly longer than that) if you do not use them. This is an approximate number and based on our experiences in keeping the products in our store. You should, however, place the products in a low humidity area to keep them longer. Do note that unused silicone last longer than unused resins before the products start gradually losing their properties (such as hardness etc.) Hope this helps and have a great day ahead!! ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by S***C on 12 January 2014* I've tried a lot of molding silicones from a few brands, and so far, this one's my favorite for a handful of reasons. 1. Long pot life means there's ample time to mix and pour before things start to thicken up on you. If you're like me, when you first start making your own molds, you'll find dozens of ways to screw things up. A nice long pot life means that if (or in my case, WHEN) things go haywire, you'll have plenty of time to fix things. Silicone isn't cheap, so mistakes can be expensive -- the wiggle room is nice! 2. Relatively quick cure time, especially given how long you have before the mix starts to solidify. I can come home from work, pour a mold, and it's ready to use with time to spare before I need to head to bed. 3. Platinum cure is always a plus. For mysterious reasons, I've had trouble with tin cure silicones and the material I usually cast (epoxy). I think post-curing tin-cure molds is supposed to solve part of the issue, but even when I've tried that, the tin-cure molds have left a slightly tacky, sticky film on the surface of my castings. I've had much better luck with platinum silicones, which actually seem to *improve* how my epoxy resin cures. 4. Low viscosity means you don't get bubbles as long as you don't overmix, and the trapped air in detailed molds doesn't have shove its way through super-thick goop to break free. In other words, unlike a lot of silicones, you can get excellent results with this one without using a vacuum degassing thing-a-ma-bob. The last thing is a plus/minus: This stuff is soft, but not insanely soft. The flexibility makes it excellent for intricate stuff because you don't need Hercules hands to get your casting out of the mold. However, really soft, flexible silicone like this can also cause some problems. So here are a couple tips I learned the hard way :). 1. If you'll be casting something in multiple layers, make sure you either place your mold in some kind of support shell -- a cup or a plastic bowl can work -- or make your mold with extra "buffer" rubber on the base and the sides. Why? Well, if you move the mold too much, those awesome natural silicone release properties can work against you and knock your layer loose, which means the next layer can ooze down the sides. Having something to make sure the soft mold doesn't get jostled makes all the difference. 2. On a similar note, if you're going to make one mold with lots of cavities, it's probably best to time things to everything is ready to be popped out of the mold at the same time. The flexibility means it's pretty easy to accidentally knock one casting loose while trying to remove another one. All in all, a really awesome product. Highly recommended! ### ⭐⭐⭐⭐⭐ Review *by M***Y on 18 October 2021* I used this to mold ornate chess pieces and to make some cuppboard knobs in PU resin. It mixes simply and don't have to hurry (in fact I might look for a slightly faster version). I cast using a plastic cup and a paper cyclinder as a container and both worked fine and could be removed. neither of the masters (the resin chess pieces of wooden knobs) got stuck at all. The resulting mold has good, but flexibility but is fairly dense, the knob needed a split mold to get the bulbous part out. I cast with PU resin without any mold release spray and they came out of the mold easily and the level of detail was exceptional. ### ⭐⭐⭐⭐⭐ Review *by M***A on 28 October 2019* 👍 ## Frequently Bought Together - Mold Star 15 Slow - 1A:1B Mix by Volume Platinum Silicone Rubber - Pint Unit - Smooth-Cast™ 300: Bright White, Low Viscosity, Liquid Plastic Casting Resin - Pint Unit - Smooth-On Universal™ Mold Release Spray, 14 fl. oz. Aerosol Can --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/339668414-smooth-on-inc-mold-star-15-slow-moldmaking-silicone-rubber](https://www.desertcart.gr/products/339668414-smooth-on-inc-mold-star-15-slow-moldmaking-silicone-rubber) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-04-25*