{"product_id":"siliconen-condensatie-dc-3481-r","title":"Dow Silastic RTV 3481 R – Condensation Silicone for Resin \u0026 Concrete Moulds","description":"\u003ch2\u003ePremium Condensation Silicone for Professional Resin and Concrete Moulds\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDow Silastic RTV 3481 R\u003c\/strong\u003e is a high-quality 2-component condensation-curing (tin-cure) casting silicone with a Shore A 19 hardness, specially developed for durable moulds with improved service life when casting polyester resin. This professional silicone combines excellent flowability (self-deairing), high mechanical strength (tensile strength 4.6 MPa) and 622% elongation with broad chemical resistance – ideal for art casting, WetCast concrete and industrial moulds. The mixing ratio is 100:5 (A:B) by weight, with a working time of 90 to 120 minutes and curing within 24 hours at room temperature.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved resin resistance (-R variant):\u003c\/strong\u003e Specifically tuned for longer mould life with polyester casting resin; also suitable for polyurethane, concrete, wax and soap – ideal for industrial and artistic foundries\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcellent flowability:\u003c\/strong\u003e Viscosity 20,000 mPa·s for self-deairing casting without vacuum treatment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh mechanical strength:\u003c\/strong\u003e 4.6 MPa tensile strength and 26 kN\/m tear strength for long-lasting, durable moulds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtreme elongation:\u003c\/strong\u003e 622% elongation at break for easy demoulding of complex geometries and undercuts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong working time:\u003c\/strong\u003e 90-120 minutes pot life for mixing, deairing and filling large or highly detailed models\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimal shrinkage:\u003c\/strong\u003e 0.2-0.4% linear shrinkage for dimensionally accurate reproductions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMoulds for polyester and polyurethane casting resin in art casting and industrial production\u003c\/li\u003e\n\u003cli\u003eWetCast concrete moulds for precast elements, tiles and architectural ornaments\u003c\/li\u003e\n\u003cli\u003eArt casting: moulds for statues, sculptures and decorative objects\u003c\/li\u003e\n\u003cli\u003eModel making and prototyping for small series and test parts\u003c\/li\u003e\n\u003cli\u003eHoneycomb and wax casting applications\u003c\/li\u003e\n\u003cli\u003eIndustrial moulds for ornaments, reliefs and architectural elements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eProcessing instructions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eStir the A component (base) thoroughly first; filler may settle during prolonged storage\u003c\/li\u003e\n\u003cli\u003eWeigh 100 parts A to 5 parts B (by weight; e.g. 50 g B per 1 kg A) and mix until the curing agent is fully dispersed\u003c\/li\u003e\n\u003cli\u003eMix carefully by hand or mechanically; do not let the temperature exceed 35 °C\u003c\/li\u003e\n\u003cli\u003eDe-air in a vacuum chamber if desired; then pour within the 90-120 minute pot life and avoid air entrapment\u003c\/li\u003e\n\u003cli\u003eCure at room temperature (22-24 °C); demould after a maximum of 24 hours. Final properties are reached within 7 days\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eSpatula moulds:\u003c\/strong\u003e Add 0.6-2% \u003ca rel=\"noopener\" href=\"https:\/\/www.siliconesandmore.com\/products\/thixo-c\" target=\"_blank\"\u003eThixo C\u003c\/a\u003e (typically 1%) to thicken the mixture for spatula applications. Combine with a support shell of \u003ca rel=\"noopener\" href=\"https:\/\/www.siliconesandmore.com\/products\/gips-gipsverband\" target=\"_blank\"\u003eplaster (bandage)\u003c\/a\u003e, \u003ca rel=\"noopener\" href=\"https:\/\/www.siliconesandmore.com\/nl\/epoxy-steunkap.html\" target=\"_blank\"\u003eepoxy putty\u003c\/a\u003e or \u003ca rel=\"noopener\" href=\"https:\/\/www.siliconesandmore.com\/products\/acryl-hars-set\" target=\"_blank\"\u003eacrylic resin\u003c\/a\u003e with \u003ca rel=\"noopener\" href=\"https:\/\/www.siliconesandmore.com\/products\/triaxiaal-glasvezeldoek\" target=\"_blank\"\u003eglass fabric\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Temperature and humidity affect the curing speed; higher temperature and humidity shorten the working time. Condensation-curing silicones can soften and lose elasticity under prolonged exposure above 150 °C or when fully confined at high ambient temperature. This is an industrial product and is not intended for food, dental or skin-contact applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDow\u003c\/strong\u003e is a world leader in silicone technologies for professional foundries, construction applications and industrial moulds, with decades of expertise in condensation silicones.\u003c\/p\u003e\n\u003ch3\u003eProfessional Support\u003c\/h3\u003e\n\u003cp\u003eOur technical specialists advise on mixing ratios, curing speeds, support-shell construction and optimal results for your specific resin or concrete mould application. Contact us for technical data sheets or advice on condensation silicones for your project.\u003c\/p\u003e","brand":"Dow Corning","offers":[{"title":"1.05 kg. Set (A+B)","offer_id":49531886567765,"sku":"S10436","price":33.5,"currency_code":"EUR","in_stock":true},{"title":"5.25 kg set (A + B)","offer_id":49531886600533,"sku":"S82023","price":160.55,"currency_code":"EUR","in_stock":true},{"title":"26.25 kg set (A + B)","offer_id":49531886633301,"sku":"S82024","price":747.39,"currency_code":"EUR","in_stock":false},{"title":"210 kg set (A + B)","offer_id":49531886666069,"sku":"S82025","price":5757.65,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0896\/4096\/0341\/files\/dow-corning-dow-silastic-rtv-3481-r-condensatie-silicone-voor-hars-48098058142037.jpg?v=1775744537","url":"https:\/\/siliconesandmore.com\/en\/products\/dow-silastic-rtv-3481-r-condensation-silicone","provider":"siliconesandmore","version":"1.0","type":"link"}