Silicon Moulding / Cast Resin

What are the key properties of modern molding compounds and casting resins?

Molding materials and 2K casting resins are essential wherever high detail reproduction, dimensional stability, and process-safe handling are required. Silicone rubber compounds offer high tear strength, are flexibly demoldable, and enable bubble-free casting. Ideal for model making, art mold creation, or duplicating technical parts. Epoxy resins for mold making are known for excellent polishability, sandability, and dimensional accuracy – crucial for tool molds and prototypes. PUR casting resins offer great flow properties, short demolding times, and can be customized with fillers or color pastes. Acrylic casting resins, as solvent-free systems, provide odorless, eco-friendly processing – perfect for decorative and technical objects. These materials meet the highest standards in model making, rapid prototyping, and electronic potting.

What types of molding compounds and casting resins are available?

There is a wide range of molding materials and casting resin systems, each with specialized properties for different applications:

> Silicone molding compound
These elastic molding compounds based on silicone are ideal for creating highly detailed, precision molds. They remain permanently flexible, are chemically resistant, temperature-stable, and allow shrink-free demolding. Commonly used for model molds, art replicas, and creative casting. Buying silicone molding compounds ensures tear resistance, dimensional fidelity, and bubble-free processing.

> PUR casting resin
A two-component polyurethane resin with fast curing, good flow characteristics, and high-detail resolution. Perfect for delicate cast parts, models, and prototypes, and ideal as an electronic potting resin. PUR systems are typically impact-resistant, sandable, and load-bearing – making them ideal for technical parts and model making. Thanks to short demolding times, fast-cure PUR resins are also suitable for small batch production.

> Epoxy casting resin
This 2K epoxy resin offers high mechanical strength, thermal resistance, and is suited for large-volume or crystal-clear castings like tabletops, inlays, or industrial molds. It’s low in bubbles, has a long pot life, and can be modified with dyes, fillers, or additives. Due to its strong adhesion and compressive strength, it’s used in mold making, as embedding resin, or for surface sealing.

> Acrylic casting resin
A modern plastic resin system based on water, ideal for artistic creations, decorative items, and replicas. It’s odorless, solvent-free, and perfect for thin-walled structures, reliefs, or historical reproductions. The resin cures quickly and can be easily post-processed. Thanks to mineral fillers, it's also well-suited for technical molds and dimensionally accurate serial production.

> Repair resin
These high-strength resins are used to restore damaged parts, fill voids, reinforce, or bond components. They offer excellent adhesion, impact resistance, and are widely used in automotive, marine, and industrial repair. As filler resin, adhesive resin, or injection resin, they ensure durability. Particularly suitable for structural bonding in CFRP and GFRP components.

> Modeling silicone molds
Specially designed for model building, small-scale series production, and miniature manufacturing, these silicone molds capture extremely fine details and are praised for their shape retention and longevity. They are reusable, compatible with various casting resins – from PUR to epoxy – and allow damage-free demolding of complex geometries. Ideal for resin casting, rapid prototyping, and figurine production.

What are the advantages of different resin systems?

Each casting resin technology offers specific advantages for individual applications. Buying silicone molding compounds is especially beneficial for filigree replicas, as they capture even the finest details while staying dimensionally stable. Epoxy casting resins for mold making or copy models are pressure-resistant, tough, and can be polished or post-processed with ease. PUR resins, also known as fast-curing resins, impress with their low viscosity and quick handling time – ideal for series production of thin-walled parts. For creative projects and object duplication, acrylic resins are ideal thanks to their water base, low shrinkage, and easy release. All types can be accurately dosed and offer various benefits like mechanical strength, chemical resistance, or UV stability – crucial for industrial manufacturing, artisanal work, or restoration.

Where are molding compounds and casting resins commonly used?

Molding and casting systems are used in many fields: from model making, prototype production, and furniture design to the potting of electrical components. Silicone molds are ideal for miniatures, sculptures, replicas, or architectural details. In technical mold making, high-strength epoxy resins are key – whether for mold plates, injection resins, surface coatings, or as repair resin, they deliver mechanical durability and long life cycles. PUR systems are commonly used as electronic potting compounds or for impact-resistant form parts. If you're looking to buy acrylic casting resin, you're choosing a solvent-free option for making decorative objects, technical reliefs, or historical reproductions. Modern 2K resin systems are also essential in stone carpet applications, wood casting, design elements, and restoration work.