{"title":"Heat Resistant Silicone","description":"\u003cstyle\u003e\n  \/* Variables are fine in :root, but we will only use them inside our scoped class *\/\n  :root {\n    --primary: #287ecb !important;\n    --accent: #db463e !important;\n    --dark: #1a1a1a !important;\n    --light: #f8fafc !important;\n    --white: #ffffff !important;\n    --gray: #64748b !important;\n    --border: #e2e8f0 !important;\n  }\n\n  \/* Scoped Wrapper: This replaces the 'body' styles *\/\n  .collection-page-wrapper {\n    margin: 0 !important;\n    padding: 0 !important;\n    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif !important;\n    background-color: var(--white) !important;\n    color: var(--dark) !important;\n    line-height: 1.6 !important;\n    box-sizing: border-box !important;\n  }\n\n  \/* Ensure box-sizing only applies to elements inside the collection *\/\n  .collection-page-wrapper * {\n    box-sizing: border-box !important;\n    -webkit-font-smoothing: antialiased !important;\n  }\n\n  .collection-page-wrapper .rte {\n    max-width: 800px !important;\n    margin: 0 auto !important;\n    padding: 40px 20px !important;\n  }\n\n  \/* Simplified Intro Section - Removed H1 and Border *\/\n  .collection-page-wrapper .intro-section {\n    margin-bottom: 40px !important;\n    padding: 0 !important;\n  }\n\n  .collection-page-wrapper .intro-section p {\n    font-size: 18px !important;\n    line-height: 1.6 !important;\n    color: #475569 !important;\n    margin: 0 !important;\n    padding: 0 !important;\n    border: none !important;\n  }\n\n  \/* Typography - Only targeting headers inside the wrapper *\/\n  .collection-page-wrapper h2 {\n    font-size: 22px !important;\n    font-weight: 800 !important;\n    margin: 50px 0 20px 0 !important;\n    color: var(--dark) !important;\n    display: flex !important;\n    align-items: center !important;\n    gap: 12px !important;\n    text-transform: uppercase !important;\n    letter-spacing: 0.05em !important;\n  }\n\n  .collection-page-wrapper h2::after {\n    content: \"\" !important;\n    flex: 1 !important;\n    height: 1px !important;\n    background: var(--border) !important;\n  }\n\n  .collection-page-wrapper p {\n    margin-bottom: 20px !important;\n    font-size: 16px !important;\n    color: #334155 !important;\n  }\n\n  .collection-page-wrapper strong {\n    color: var(--accent) !important;\n    font-weight: 700 !important;\n  }\n\n  \/* Links *\/\n  .collection-page-wrapper a {\n    color: var(--primary) !important;\n    text-decoration: none !important;\n    transition: all 0.2s ease !important;\n    font-weight: 600 !important;\n    border-bottom: 1px solid transparent !important;\n  }\n\n  .collection-page-wrapper a:hover {\n    color: var(--accent) !important;\n    border-bottom: 1px solid var(--accent) !important;\n  }\n\n  \/* Lists - AGGRESSIVE BULLET REMOVAL FOR SHOPIFY *\/\n  .collection-page-wrapper .rte ul,\n  .collection-page-wrapper ul {\n    list-style: none !important;\n    list-style-type: none !important;\n    padding: 0 !important;\n    margin: 25px 0 !important;\n    display: grid !important;\n    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)) !important;\n    gap: 12px !important;\n  }\n\n  .collection-page-wrapper .rte ul li,\n  .collection-page-wrapper ul li {\n    list-style: none !important;\n    list-style-type: none !important;\n    position: relative !important;\n    padding: 12px 15px !important;\n    background: var(--light) !important;\n    background-image: none !important; 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}\n  \n  .collection-page-wrapper .faq-answer {\n    padding: 0 20px 15px 20px !important;\n    font-size: 15px !important;\n    color: var(--gray) !important;\n  }\n\n  @media (max-width: 600px) {\n    .collection-page-wrapper .rte { padding: 20px 15px !important; }\n    .collection-page-wrapper h2 { font-size: 18px !important; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"collection-page-wrapper\"\u003e\n\u003cdiv class=\"rte\"\u003e\n\u003cdiv class=\"intro-section\"\u003e\n\u003cp\u003e\u003cstrong\u003eHeat-resistant silicone\u003c\/strong\u003e has become one of the most practical materials in modern fabrication. Whether you are making molds for resin 3D printing, casting parts in pewter or low-melt metals, or working on projects that demand durability under high temperatures, the right silicone makes all the difference. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSiraya Tech Defiant Series platinum silicones\u003c\/strong\u003e are specifically formulated for use with 3D printed parts, resisting the curing inhibition that breaks down lesser silicones when they contact UV resins.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhat Is Heat-Resistant Silicone?\u003c\/h2\u003e\n\u003cp\u003eHeat-resistant silicone is a platinum-cure elastomer that maintains its properties from below freezing to over 200°C. Unlike tin-cure silicones, platinum-cure variants offer superior resistance to thermal aging and physical compression.\u003c\/p\u003e\n\u003cp\u003eIn fabrication, your mold must survive the exothermic heat of curing resins and molten metals. If the silicone fails, the mold deforms or degrades. Siraya Tech Defiant silicones are engineered to solve this problem while maintaining compatibility with UV resins.\u003c\/p\u003e\n\u003ch2\u003ePlatinum Cure vs. Tin Cure Silicones\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlatinum cure (addition cure)\u003c\/strong\u003e: High accuracy, low shrinkage, and strong heat resistance. Dimensionally stable and resistant to cure inhibition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTin cure (condensation cure)\u003c\/strong\u003e: More affordable but prone to shrinkage and less heat-resistant. Often suffers from inhibition with 3D printed resins.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSiraya Tech Defiant Series\u003c\/h2\u003e\n\u003cp\u003eCo-developed with professional prop makers, the Defiant Series allows you to pour silicone directly over 3D printed parts without treating or sealing the surface first.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDefiant 10\u003c\/strong\u003e (10A Shore): Soft and flexible for delicate or complex geometry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDefiant 15\u003c\/strong\u003e (15A Shore): Mid-range flexibility; a great general-purpose choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDefiant 25\u003c\/strong\u003e (25A Shore): Firmer for structural strength or high-temperature metal casting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow to Use Defiant Silicone\u003c\/h2\u003e\n\u003cdiv class=\"steps-container\"\u003e\n\u003cdiv class=\"step-item\"\u003ePrepare your 3D printed master. Clean it thoroughly to remove any uncured resin, isopropyl alcohol residue, or dust. A short UV post-cure is recommended.\u003c\/div\u003e\n\u003cdiv class=\"step-item\"\u003eMix the silicone according to the instructions on the product. Defiant silicones are two-part systems. Measure by weight at the recommended ratio for your hardness level.\u003c\/div\u003e\n\u003cdiv class=\"step-item\"\u003eDe-air the mixed silicone using a vacuum chamber if available. If not, mix slowly and let it sit for a few minutes to allow large air bubbles to escape before pouring.\u003c\/div\u003e\n\u003cdiv class=\"step-item\"\u003ePour the silicone slowly over your master part. Start from the lowest point and let it flow up and over the geometry. This reduces air entrapment in fine details.\u003c\/div\u003e\n\u003cdiv class=\"step-item\"\u003eAllow the silicone to cure fully. Cure time depends on the hardness level and ambient temperature. Do not rush the cure, especially for thicker mold sections.\u003c\/div\u003e\n\u003cdiv class=\"step-item\"\u003eOnce fully cured, carefully remove the master from the mold. Defiant silicones are flexible enough to release complex geometry without damage to the pattern.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eHeat Resistance and Durability\u003c\/h2\u003e\n\u003cp\u003eThe Defiant Series maintains structural integrity across a wide thermal range. This is critical when casting hot materials like pewter or urethane.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDefiant 25\u003c\/strong\u003e is specifically suited for high-heat applications, resisting deformation even after repeated thermal cycles.\u003c\/p\u003e\n\u003ch2\u003eWhy Siraya Tech Defiant for Heat-Resistant Silicone?\u003c\/h2\u003e\n\u003cp\u003eSiraya Tech built the Defiant Series out of real fabrication needs. Professional prop makers and product designers who use 3D printed masters daily needed a silicone that could be poured directly over their prints without fail.\u003c\/p\u003e\n\u003cp\u003eThe result is a platinum-cure line with genuine resistance to cure inhibition and high heat performance across three Shore hardness options.\u003c\/p\u003e\n\u003cp\u003eWhether you are casting pewter rings, making resin copy molds, or building production tools for urethane parts, Defiant gives you a silicone that works with your 3D printed geometry rather than against it.\u003c\/p\u003e\n\u003ch2\u003eShop Related Collections\u003c\/h2\u003e\n\u003cdiv class=\"collection-grid\"\u003e\n\u003ca href=\"https:\/\/siraya.tech\/collections\/silicone\"\u003eSilicone\u003c\/a\u003e \u003ca href=\"https:\/\/siraya.tech\/collections\/silicone-rubber\"\u003eSilicone Rubber\u003c\/a\u003e \u003ca href=\"https:\/\/siraya.tech\/collections\/heat-resistant-resin\"\u003eHeat Resistant Resin\u003c\/a\u003e \u003ca href=\"https:\/\/siraya.tech\/collections\/castable-resin\"\u003eCastable Resin\u003c\/a\u003e \u003ca href=\"https:\/\/siraya.tech\/collections\/engineering-resin\"\u003eEngineering Resin\u003c\/a\u003e \u003ca href=\"https:\/\/siraya.tech\/collections\/accessories-for-3dprinter-and-resin-fdm-prints\"\u003eAccessories\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"related-articles\"\u003e\n\u003ch3\u003eRelated Articles\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/siraya.tech\/blogs\/news\/innovative-silicone-mold-kit\"\u003eInnovative Silicone Mold Kit Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/siraya.tech\/blogs\/news\/how-to-cast-pewter-using-3d-printing-and-siraya-tech-defiant-25-silicone-mold\"\u003eCasting Pewter with Defiant 25\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/siraya.tech\/blogs\/news\/cleaning-and-sterilizing-siraya-tech-defiant-silicone-parts\"\u003eCleaning and Sterilizing Molds\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/siraya.tech\/blogs\/news\/can-you-3d-print-silicone\"\u003eCan You 3D Print Silicone?\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat makes heat-resistant silicone different from standard silicone?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003eHeat-resistant silicone uses platinum-cure chemistry rather than tin-cure chemistry. Platinum cure silicones maintain their mechanical properties across a much wider temperature range, from well below freezing to over 200 degrees Celsius. They also resist cure inhibition when poured over 3D printed surfaces, which is the main limitation of standard tin-cure silicones in fabrication workflows.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I pour silicone directly over a 3D printed part?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003eIt depends on the silicone. Standard tin-cure silicones often suffer cure inhibition when poured over UV resin 3D printed surfaces, leaving a tacky layer at the interface. Siraya Tech Defiant Series platinum silicones are specifically formulated to resist this inhibition, so you can pour them directly over your 3D printed master without a sealer or barrier layer. Always verify your 3D printed master is fully post-cured before pouring.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat Shore hardness should I choose for mold making?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003eUse Defiant 10 or 15 for delicate or intricate 3D printed masters where the mold needs to flex during demolding. Use Defiant 15 for general-purpose mold making. Use Defiant 25 for high-heat applications like metal casting, or when you need a more rigid mold for production use.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs Defiant silicone food safe?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003eYes. Once fully cured according to the product instructions, Defiant silicones are food-safe. This makes them suitable for making molds for edible applications like chocolate, soap, and candy casting, subject to following safe handling and curing procedures.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I mix and de-air platinum silicone?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003eMix the two parts by weight at the recommended ratio. De-air using a vacuum chamber if available. If you do not have a vacuum chamber, mix slowly and let the mixture rest for a few minutes to allow large air bubbles to escape before pouring. Pour slowly from the lowest point of your mold frame to reduce air entrapment in fine details.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat temperature can Defiant silicone withstand?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003eDefiant Series platinum silicones maintain their properties across a wide temperature range. Defiant 25, the firmest formulation, is specifically designed for high-heat applications like pewter casting where mold temperatures can reach 230 to 250 degrees Celsius. The softer grades offer good heat resistance for standard resin casting and moderate-temperature applications.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","products":[{"product_id":"siraya-tech-silicone-defiant-25","title":"Siraya Tech Platinum Silicone - Defiant 25","description":"\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan class=\"a-list-item\" data-mce-fragment=\"1\"\u003e【Extra Resistance to Platinum Poisoning and Less Post-processing】Siraya Tech Defiant 25 silicone mold-making kit is designed to be much more tolerant than common platinum silicone, but some resins are just better in terms of working with silicone and require a lot less post-processing. With just 30 minutes of curing the part submerged in water, Defiant 25 will cure without the part being clear coated. Our platinum silicone rubber can also be used with 3d printing UV resin.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan class=\"a-list-item\" data-mce-fragment=\"1\"\u003e【Easy Mixing Ratio 1A:1B】Siraya tech Defiant 25 silicone mold-making kit consists of part A 17.64Oz and part B 17.64Oz, mixing ratio 1:1, by weight (or volume), easy to mix, self-degassing, and very easy to use. Siraya Tech Defiant 25 liquid silicone rubber can be easily used by beginners without any experience. (For detailed usage, please refer to the user manual of \"Product guides and documents\" at the bottom of the page to make your mold more exquisite.)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan class=\"a-list-item\" data-mce-fragment=\"1\"\u003e【Easy to Use 】This Mold Making Silicone Rubber kit is very simple to use, you need to mix parts A and B according to the weight (or volume) ) in a 1:1 ratio mix, then stir the silicone rubber for 5 minutes. Make sure to stir the liquid rubber mixture well for better results. (The products made with this silicone kit are bubble-free.) Pot life is about 15 minutes and it fully cures in 4 - 6 hours (the ambient temperature at 25C).\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan class=\"a-list-item\" data-mce-fragment=\"1\"\u003e【Extremely Low Viscosity】Siraya Tech platinum silicone mold-making rubber is a low viscosity, easy to mix and pour, and also has the same material strength as standard platinum silicone, including tear strength and heat resistance. The finished molds with this silicone mold-making kit are soft and elastic, very flexible, and easy to demould, with high tensile strength. With this liquid silicone mold, you can easily get flexible and smooth silicone molds.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan class=\"a-list-item\" data-mce-fragment=\"1\"\u003e【Widely Used】Siraya Tech Defiant 25 has a good balance of hardness and flexibility, is generally applicable to general molding applications, and is ideal for applications such as crafts, casting resins, and more. It is a silicone mold set specially formulated for resin molds, wax molds, candle molds, soap molds, casting molds and architectural details, statue and figurine making. (If you have any questions, please feel free to contact us.)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Siraya Tech","offers":[{"title":"US \/ 1KG (500gA+500gB)","offer_id":40546451980397,"sku":"ST2001","price":24.99,"currency_code":"USD","in_stock":true},{"title":"US \/ 2KG (1000gA+1000gB)","offer_id":43632887136365,"sku":"ST2301","price":40.93,"currency_code":"USD","in_stock":true},{"title":"CA \/ 1KG (500gA+500gB)","offer_id":40651507040365,"sku":"ST2001CA","price":26.63,"currency_code":"USD","in_stock":true},{"title":"AU \/ 1KG (500gA+500gB)","offer_id":40733306749037,"sku":"ST2001AU","price":26.39,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0255\/7539\/1341\/products\/61uVwBSbjwL._AC_SX679.jpg?v=1675908164"},{"product_id":"siraya-tech-silicone-defiant-15","title":"Siraya Tech Platinum Silicone - Defiant 15","description":"\u003cdiv data-slate-node=\"element\"\u003e\n\u003cp\u003eStop struggling with failed silicone cures.\u003c\/p\u003e\n\u003cp\u003eDefiant 15 is an advanced platinum-cure silicone specifically engineered to resist curing inhibition from 3D printed resins. With a simple 1:1 mix ratio and low viscosity, it allows both beginners and pros to create high-detail, reusable molds for resin, food, wax, and more.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFood safety certified.\u003c\/li\u003e\n\u003cli\u003eCompatible with Siraya Tech Fast\/Build\/Blu\/Simple V2\/Sculpt resins. Please note that other brands resin have not been tested.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Siraya Tech","offers":[{"title":"US \/ 1KG (500g A+500g B)","offer_id":40711709753453,"sku":"ST2002","price":23.99,"currency_code":"USD","in_stock":true},{"title":"US \/ 2KG (1000g A+ 1000g B)","offer_id":43868281798765,"sku":"ST2302","price":40.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0255\/7539\/1341\/products\/61no9Nb-26L._AC_SL1500.jpg?v=1692943131"},{"product_id":"platinum-silicone-defiant-10a-hardness-food-safety","title":"Siraya Tech Platinum Silicone - Defiant 10","description":"\u003cp\u003eSiraya Tech Defiant 10 is a premium 10A Shore hardness platinum silicone engineered to resist curing inhibition from 3D printer UV resins. Co-developed with professional prop makers, it eliminates the need for complex coatings, offering a smooth, flexible, and frustration-free mold-making experience.\u003c\/p\u003e","brand":"Siraya Tech","offers":[{"title":"US \/ 1KG (500gA+500gB)","offer_id":44038562676845,"sku":"ST2003","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0255\/7539\/1341\/files\/Defiant10A-platinumsilicone6.png?v=1770889045"}],"url":"https:\/\/sirayatech.myshopify.com\/collections\/heat-resistant-silicone.oembed","provider":"Siraya Tech","version":"1.0","type":"link"}