Choosing the right silicone for projects involving both steel and rubber can be challenging due to the need for versatility, durability, and fine detail reproduction. This page explores the top silicone options available for mould making, art, or technical applications where compatibility with rigid and flexible surfaces matters. If you need a robust, reliable silicone for mixed-materials work, this guide is for you.

Overview: Comparing the Best Silicones for Steel and Rubber

When selecting a silicone suitable for both steel and rubber, it’s crucial to balance flexibility, resistance, and detail capture. In this comparison, we feature platinum-based and bi-component silicones that offer excellent compatibility across an array of casting materials. Whether you’re creating professional moulds or artistic pieces, each silicone has unique advantages regarding mixing, curing speed, and durability. We’ll explore their key features and help you identify the right choice for your project requirements.

Visualising the Right Silicone for Your Mixed-Material Projects

Get inspired by real-world applications of translucent and bi-component silicone rubbers. Observe results achieved with steel-backed and rubberised mould forms using the “Pure Mould” and “Liquid Mould” ranges for detailed, resilient moulds.

“Pure Mould” – Translucent Liquid Silicone Rubber for Mould Making

For those seeking high-quality, translucent platinum-based silicone, “Pure Mould” – Translucent Liquid Silicone Rubber for Mould Making stands out. Its fast-curing (3–8 hours) and easy 1:1 mixing ratio make it accessible for both professionals and hobbyists.

PLATINUM BASED TRANSLUCENT AND FAST CASTING LIQUID SILICONE RUBBER FOR MOULDS ensures suitability for projects that demand the creation of reusable and highly detailed moulds. Its unique formulation is especially compatible with epoxy, polyester, polyurethane, acrylics, plaster, and cement—ideal if steel and rubber are key materials in your work.

IMPECCABLE QUALITY guarantees resistance and reusability, while low shrinkage and up to 30% longer service life bring peace of mind for repeated casting cycles. The transparency of “Pure Mould” allows you to monitor the process closely, reducing mistakes and waste.

As a solvent-free, odourless and certified non-toxic product, “Pure Mould” meets the highest safety standards for both your workspace and finished items.

“Liquid Mould” – Casting Liquid Silicone Rubber, 5-40 Shores, Bi-Component A+B

If you require a versatile silicone that penetrates intricate spaces and accurately reproduces fine detail, “Liquid Mould” – Casting Liquid Silicone Rubber, 5-40 Shores, Bi-Component A+B offers an adaptable solution. Its bi-component system (A+B) allows you to mix and cure as you need, with a high strength formula suitable for technical and decorative casts.

CASTING LIQUID SILICONE RUBBER – for moulds, bi-component A + B. This system is compatible with resins, soap, polymer pastes, as well as more challenging shapes found in industrial applications. The catalyst-activated formula helps produce highly detailed moulds, essential for accurate work on both steel and rubber forms.

Its 5–40 shore rating indicates variable hardness to suit a range of moulding needs, whether flexibility or rigidity is required. Ideal for both serial production of models and unique bespoke projects.

“Liquid Mould” – Casting Liquid Silicone Rubber, 15 Shores 20.8 kg

Specially designed for professional settings or larger-scale reproductions, “Liquid Mould” – Casting Liquid Silicone Rubber, 15 Shores 20.8 kg provides the volume needed for repeated high-quality casting. Retaining all the fine detail and undercut capabilities of its smaller counterparts, this product emphasises reliability for multiple runs with hard or flexible materials—including steel and rubber combinations.

This bi-component silicone delivers a mid-range 15 shore hardness for balanced detail capture and flexibility. Its adaptability across different casting materials (resin, plaster, wax, etc.) makes it well-suited for workshops dealing with a variety of forms.

CASTING LIQUID SILICONE RUBBER – for moulds, bi-component A + B. As with the rest of the Liquid Mould range, catalyst addition is essential for use, and its easy-to-work formula supports technical and artistic projects alike.

“Silicone Hexagons Mould” – For Creating with Epoxy Resin – 24x21cm

For those focused on decorative or craft projects, the “Silicone Hexagons Mould” – For Creating with Epoxy Resin – 24x21cm offers a ready-made, flexible mould suitable for use with epoxy, steel embellishments, and rubber bases. Its robust silicone construction is heat resistant, easy to clean, and reusable—making it excellent for repeated artistic creations.

The flexible design enables you to create coasters, keepsakes, or custom components that might blend steel elements with resin infills or rubber accents. Its professional-grade silicone construction provides long-term durability for ongoing crafting.

Tips for Selecting the Right Silicone for Mixed-Material Projects

When choosing silicone for use with both steel and rubber, consider the primary purpose of your mould. For fine technical work with high detail, opt for platinum-based or bi-component silicones with low shrinkage and superior mechanical properties, such as “Pure Mould” or “Liquid Mould” varieties. For decorative or craft projects, flexible reusable options like the Silicone Hexagons Mould may best fit your needs.

Key factors to weigh include: curing time, hardness (shore rating), resistance to chemicals, ease of mixing, and long-term reusability. Reviewing the product details and matching them with your material combinations will result in greater success and fewer casting issues.

Project Examples and Expert Guidance

Explore a range of cast moulds incorporating steel and rubber elements. See the different finishes possible with platinum-based and flexible silicone options, and learn expert-approved techniques for achieving the best results on mixed material projects.