Mold making & molding.
Silicone reproduces the finest details and delivers dimensionally accurate castings, from architectural models to art and jewelry, all the way to production molds. The curing system, Shore hardness, and release agent determine the level of detail and the mold's lifespan.
overview
Basics
In mold making, silicones allow for low-shrinkage, highly detailed molds. Addition-curing (platinum-catalyzed) types offer minimal shrinkage, maximum dimensional accuracy, and food-grade variants, but are sensitive to inhibition by sulfur, tin, or amines. Condensation-curing (tin-catalyzed) types are more robust in handling and less expensive, with slightly higher shrinkage. The Shore hardness determines which geometries and undercuts can be demolded. The casting material, such as casting resin, concrete, or plaster, also influences the system and release agent required. Silicone is often self-releasing; a release agent is necessary for silicone-on-silicone or reactive resins. The technical data sheet of the respective system is binding.
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Products & Brands
Addition-curing and condensation-curing RTV-2 silicones in various Shore hardnesses, along with casting resins, release agents, and processing accessories: you'll find the right materials for model making, art, and series production directly in our shop. Technical data sheets are available to help you make your decision.
To know
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Guidelines and comparisons from the knowledge center: from material selection to Shore hardness to the right release agent.
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Areas of application
For which industry?
Molding silicones and casting resins are used in these industries, among others.
FAQ
Frequently Asked Questions
Addition-based or condensation-based?
Addition-curing (platinum) for precision, dimensional accuracy, food contact, and series production. Condensation-curing (tin) for large molds, individual castings, and tight budgets. Specific properties are available in the data sheet.
Do I always need a release agent?
Not necessarily; silicone is often self-releasing. It becomes necessary when bonding silicone to silicone, with reactive resins like polyurethane, and with molds made of foreign materials. A preliminary test with the original materials is advisable.
Which Shore hardness is suitable?
Intricate objects and deep undercuts require softer cast materials, while flat and abrasive applications require harder ones. The required hardness depends on the geometry, cycle time, and casting material, and is specified in the data sheet.
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Material question still open?
Describe the application, component, and load. We will review suitable resin systems, technical data sheets, and possible alternatives.