{"product_id":"elastosil-wacker-m4503","title":"Wacker ELASTOSIL® M 4503 – Pourable Condensation Silicone for Polyester Molds \u0026 Reproduction","description":"\u003ch2\u003ePourable Condensation Silicone for Cost-Effective Molds, Especially for Polyester Resin\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWacker ELASTOSIL® M 4503\u003c\/strong\u003e is a pourable, condensation-curing two-component silicone rubber (RTV-2) that cures at room temperature. With a Shore A hardness of 25, a tear strength of more than 20 N\/mm and an elongation at break of 350%, this material is particularly suitable for molds of models with pronounced undercuts. Its high resistance to casting resins, especially polyester, ensures a long mold life. ELASTOSIL® M 4503 is processed with 2 wt% \u003ca href=\"\/en\/products\/t40-harder-voor-siliconen-condensatie-bestand-tege\"\u003eWACKER® Catalyst T 40\u003c\/a\u003e; the catalyst is supplied separately.\u003c\/p\u003e\n\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eHigh resistance to polyester resin:\u003c\/strong\u003e suitable for repeated casting of polyester resin, as well as plaster and wax.\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eTear strength \u0026gt;20 N\/mm:\u003c\/strong\u003e molds of heavily undercut models can be demolded without tearing.\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eElongation at break 350%:\u003c\/strong\u003e high extensibility and elasticity for demolding complex geometries.\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eShore A 25:\u003c\/strong\u003e soft and flexible, with long-term stable mechanical properties.\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eGood flow:\u003c\/strong\u003e pourable with a viscosity of approx. 40,000 mPa·s, good detail reproduction.\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eAdjustable working time:\u003c\/strong\u003e with 2–4% Catalyst T 40 you can adapt pot life and cure time to your application.\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eNo inhibition issues:\u003c\/strong\u003e as a condensation silicone it is insensitive to the substances that can inhibit addition silicones.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCost-effective molds for casting polyester resin\u003c\/li\u003e\n  \u003cli\u003eReproduction of models with very pronounced undercuts\u003c\/li\u003e\n  \u003cli\u003eMolds for plaster and wax casting\u003c\/li\u003e\n  \u003cli\u003eReproduction of sculptures, reliefs and decorative objects\u003c\/li\u003e\n  \u003cli\u003eModel making and prototyping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eProcessing instructions:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003col\u003e\n  \u003cli\u003eStir the base (white) thoroughly in its container before use, so that any settled fillers are evenly redistributed.\u003c\/li\u003e\n  \u003cli\u003eWeigh out the required amount and add 2 wt% WACKER® Catalyst T 40 (20 g per kg). For faster processing and curing, up to 4% can be added.\u003c\/li\u003e\n  \u003cli\u003eMix slowly and carefully until the mixture is homogeneous and streak-free, scraping the sides and bottom of the mixing cup.\u003c\/li\u003e\n  \u003cli\u003eOptionally degas the mixture in a vacuum chamber to remove air bubbles; recommended for fine details.\u003c\/li\u003e\n  \u003cli\u003ePour the mixture slowly from a single point into the mold within the pot life (approx. 75 minutes at 23 °C with 2% T 40).\u003c\/li\u003e\n  \u003cli\u003eThe mold can be demolded after approx. 20 hours at 23 °C. Final properties are reached after approx. 7 days at 23 °C \/ 50% relative humidity.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003eManufactured by \u003cstrong\u003eWacker Chemie AG\u003c\/strong\u003e in Munich, Germany.\u003c\/p\u003e\n\n\u003ch3\u003eNote: Condensation Silicone\u003c\/h3\u003e\n\n\u003cp\u003eELASTOSIL® M 4503 is a condensation-curing silicone. Allow for a linear shrinkage of approx. 0.5%; for dimension-critical applications an addition silicone such as \u003ca href=\"\/en\/products\/elastosil-wacker-m4601\"\u003eELASTOSIL® M 4601 A\/B\u003c\/a\u003e is more suitable. This product is not suitable for food contact. Curing takes place with the help of air humidity: in very dry conditions or thick layers, curing may take longer.\u003c\/p\u003e\n\n\u003ch3\u003eProfessional Support\u003c\/h3\u003e\n\n\u003cp\u003eNot sure which silicone best suits your casting resin or application? Contact us for technical data sheets, processing advice or a quotation for larger quantities.\u003c\/p\u003e","brand":"Wacker","offers":[{"title":"25 Kg Hobbock","offer_id":55725723779413,"sku":"A90669","price":903.87,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0896\/4096\/0341\/files\/Aktionslogo-Reproduction-Moldding-WACKER-011215.jpg?v=1793194535","url":"https:\/\/siliconesandmore.com\/en\/products\/elastosil-wacker-m4503","provider":"siliconesandmore","version":"1.0","type":"link"}