{"product_id":"siliconen-additie-kleurloos-25","title":"Silicone Addition Colourless 25 – Platinum Silicone for Strong Moulds \u0026 End Products","description":"\u003ch2\u003ePremium Platinum Silicone for Professional Moulds and End Products\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSilicone Addition Colourless 25\u003c\/strong\u003e is a 2-component, platinum-cure (addition-cure) casting silicone with Shore A 25 hardness and exceptional mechanical properties. This high-quality silicone combines high tensile and tear strength (7 N\/mm² and 30 N\/mm) with very high elongation (\u0026gt;420%) and minimal shrinkage (\u0026lt;0.1%), ideal for durable moulds and strong end products. Free-flowing, self-de-airing and easy to colour with silicone pigment. Simple 1:1 mixing ratio.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional mechanical strength:\u003c\/strong\u003e 7 N\/mm² tensile strength and 30 N\/mm tear strength for durable moulds that can handle hundreds of casts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVery high elongation:\u003c\/strong\u003e \u0026gt;420% elongation for flexible applications without tearing or permanent deformation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShore A 25 hardness:\u003c\/strong\u003e Optimal balance between flexibility and stability for versatile applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlatinum-cure technology:\u003c\/strong\u003e Minimal shrinkage (\u0026lt;0.1%), no inhibition on most substrates, long mould life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree-flowing and self-de-airing:\u003c\/strong\u003e 3,900 mPa·s viscosity for excellent detail reproduction without vacuum treatment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy to colour:\u003c\/strong\u003e Transparent with a slight yellowish tint, ideal for colouring with silicone pigment for intense colours\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStrong, durable moulds for concrete, cement and WetCast precast elements\u003c\/li\u003e\n\u003cli\u003eProps, masks and flexible decorative elements for SFX, film and theatre\u003c\/li\u003e\n\u003cli\u003eEnd products and prototypes where high mechanical strength is required\u003c\/li\u003e\n\u003cli\u003ePad printing pads and flexible printing applications in the graphics industry\u003c\/li\u003e\n\u003cli\u003ePodiatry applications and medical models with a balance between softness and firmness\u003c\/li\u003e\n\u003cli\u003eJewellery moulds, design objects and industrial applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Features\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBasic specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType: 2-component platinum-cure silicone (polyaddition)\u003c\/li\u003e\n\u003cli\u003eMixing ratio: A:B = 100:100 (1:1 by weight)\u003c\/li\u003e\n\u003cli\u003ePot life: 30 minutes at 20°C\u003c\/li\u003e\n\u003cli\u003eDemould time: 3–5 hours at 20°C\u003c\/li\u003e\n\u003cli\u003eViscosity: 3,900 mPa·s at 20°C\u003c\/li\u003e\n\u003cli\u003eHardness: Shore A 23–27\u003c\/li\u003e\n\u003cli\u003eTensile strength: 7 ± 2 N\/mm²\u003c\/li\u003e\n\u003cli\u003eTear strength: 30 ± 2 N\/mm\u003c\/li\u003e\n\u003cli\u003eElongation: \u0026gt;420%\u003c\/li\u003e\n\u003cli\u003eShrinkage: \u0026lt;0.1%\u003c\/li\u003e\n\u003cli\u003eDensity: 1.03 g\/cm³ at 20°C\u003c\/li\u003e\n\u003cli\u003eColour: Transparent with a slight yellowish tint\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eProcessing instructions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eCarefully mix components A and B in a 100:100 ratio (1:1 by weight) by hand or mechanically\u003c\/li\u003e\n\u003cli\u003eStir slowly in a figure-of-eight motion to prevent air entrapment\u003c\/li\u003e\n\u003cli\u003eProcess the mixture within the 30-minute pot life\u003c\/li\u003e\n\u003cli\u003eWait until fully cured before demoulding (3–5 hours at 20°C)\u003c\/li\u003e\n\u003cli\u003eCuring can be accelerated by heat – every 10°C temperature increase roughly halves the time\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eCustomisation options:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduce hardness:\u003c\/strong\u003e Add \u003ca href=\"\/en\/collections\/siliconen-olie-polydimethylsiloxanen-olie\"\u003esilicone oil\u003c\/a\u003e (note: migrates to the surface over time)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThicken for spreading:\u003c\/strong\u003e Add \u003ca href=\"\/en\/products\/thixo-a?variant=49489539498325\"\u003eSilicone Thixo A\u003c\/a\u003e or \u003ca href=\"\/en\/products\/filler-fumed-silica?variant=49531888075093\"\u003efumed silica\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColouring:\u003c\/strong\u003e Use \u003ca href=\"\/en\/products\/silicone-dye\"\u003esilicone pigment\u003c\/a\u003e for intense colours\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSilicones and More\u003c\/strong\u003e supplies high-quality silicones for professional mould making, SFX, industrial applications and strong end products.\u003c\/p\u003e\n\u003ch3\u003eImportant Warning: Inhibition in Addition-Cure Silicones\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e This is an addition-cure silicone (platinum-cure). These silicones can be inhibited by sulphur, nitrogen, amino compounds and metal salts. If you are unsure whether the products you are using (including gloves, spatulas and cups) contain these ingredients, please do a small test first. These substances are found in many latex gloves, some plasticines, paints and adhesives, condensation-cure silicones, 1-component silicone sealants, natural rubbers and 3D printing materials (especially stereolithography). If you still wish to use these, you will need to apply a protective layer of \u003ca href=\"\/en\/products\/siliconesandmore-polyvinyl-alcohol-release-agent\"\u003epolyvinyl alcohol (PVA)\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eProfessional Support\u003c\/h3\u003e\n\u003cp\u003eOur technical specialists advise on material selection, processing techniques, colouring and optimal results for your specific mould or end-product application. Contact us for technical data sheets, processing guidelines or advice on preventing inhibition in addition-cure silicones.\u003c\/p\u003e","brand":"Silicones and More","offers":[{"title":"1 kg set","offer_id":49531857961301,"sku":"S10727","price":28.95,"currency_code":"EUR","in_stock":true},{"title":"2 kg set","offer_id":49531858026837,"sku":"S10728","price":53.75,"currency_code":"EUR","in_stock":true},{"title":"10 kg set","offer_id":49531858059605,"sku":"S11603","price":262.0,"currency_code":"EUR","in_stock":true},{"title":"50 kg set","offer_id":49531858125141,"sku":"S11708","price":1196.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0896\/4096\/0341\/files\/huismerk-sam-siliconen-additie-kleurloos-25-platinum-silicone-voor-49051663204693.png?v=1772190384","url":"https:\/\/siliconesandmore.com\/en\/products\/silicone-addition-colourless-25","provider":"siliconesandmore","version":"1.0","type":"link"}