We offer a 24hr turnaround on quote requests

Silicone Moulding Compound

Home 5 Materials 5 Silicone Moulding Compound

About Silicone Moulding Compound

Silicone moulding compound, often referred to as silicone mold rubber, is a versatile and popular material used for creating Molds in various industries. It is made from silicone elastomers, which are synthetic rubber-like materials known for their flexibility, durability, and ease of use. Silicone moulding compound is commonly employed for its ability to replicate intricate details and produce high-quality Molds.

Here are some key details about silicone moulding compound, along with its uses and benefits:

Composition and Characteristics:

Silicone moulding compounds are typically two-part materials, consisting of a base or polymer component and a curing agent or catalyst. When mixed together in the correct proportions, these components initiate a chemical reaction that results in the solidification of the silicone into a flexible and elastic rubber-like material.

Key characteristics of silicone moulding compounds include:

  • Flexibility: Silicone Molds are highly flexible, allowing for easy removal of cast objects without damaging the mold.
  • Durability: Silicone Molds can withstand multiple castings without significant degradation, making them suitable for both short-run and long-run production.
  • High Tear Strength: They exhibit excellent tear resistance, which ensures the durability and longevity of the mold, even when intricate shapes or fine details are involved.
  • Chemical Resistance: Silicone moulding compounds are resistant to a wide range of chemicals, including many casting materials such as resins, plaster, and some metals. This chemical resistance helps prolong the life of the mold.
  • Temperature Resistance: Silicone Molds can withstand a wide range of temperatures, making them suitable for casting materials that require elevated curing or melting temperatures.
  • Uses and Applications:
  • Silicone moulding compounds have a wide range of uses and applications across various industries, including:
  • Prototyping: Silicone Molds are commonly used for prototyping and model-making. They allow for the rapid production of prototypes and scale models in various materials, including plastics and resins.
  • Casting and Reproduction: Silicone Molds are used to replicate objects and create duplicates, whether for artistic sculptures, architectural elements, or industrial parts. They are especially valuable for reproducing intricate and detailed objects.
  • Candle and Soap Making: Artisans and crafters use silicone Molds for candle and soap making, as silicone can withstand the heat and chemicals involved in these processes.
  • Confectionery: In the food industry, silicone Molds are employed for making chocolates, candies, and confections with intricate shapes and designs.
  • Dental and Medical: Silicone moulding compounds are used for making dental impressions and Molds for prosthetic devices. They are also used in medical device manufacturing.
  • Special Effects and Film Production: Silicone Molds are utilized in the creation of special effects and prosthetic makeup in the film and entertainment industry.


The benefits of silicone moulding compound include:

Excellent Detail Replication: Silicone Molds can capture fine details and intricate shapes accurately.

  • Ease of Use: Silicone moulding compounds are user-friendly and require minimal special equipment for mold creation.
  • Longevity: Silicone Molds have a long lifespan and can be used for multiple castings.
  • Non-Toxic and Food Safe: Food-grade silicone Molds are available for culinary applications.
  • Variety of Hardnesses: Different silicone compounds offer varying levels of hardness and flexibility to meet specific needs.

Silicone moulding compounds are valued for their versatility, ease of use, and ability to reproduce complex shapes and fine details accurately. They have become indispensable tools in industries ranging from art and design to manufacturing and medicine.

Silicone moulding compounds are available in a range of Shore hardness values, which are measured on the Shore durometer scale. The Shore hardness scale measures the hardness or softness of materials, including elastomers like silicone, by assessing their resistance to indentation. For silicone moulding compounds, Shore A and Shore D hardness values are commonly used. Here’s what you can typically find:

Shore A Hardness: Shore A hardness is used to measure the hardness of flexible and elastomeric materials. Silicone moulding compounds are often available in a range of Shore A hardness values, which can include:

  • Very Soft: 10-20 Shore A (e.g., for making flexible and soft Molds)
  • Soft: 20-40 Shore A (e.g., for general-purpose Molds)
  • Medium: 40-60 Shore A (e.g., for Molds with moderate flexibility)
  • Firm: 60-80 Shore A (e.g., for Molds requiring some rigidity)
  • Hard: 80+ Shore A (e.g., for Molds that need to maintain their shape)

Shore D Hardness: Shore D hardness is used to measure the hardness of rigid materials, including some silicone compounds that are formulated to be firmer. While not as common as Shore A hardness for silicone moulding compounds, you can find silicone materials with Shore D values, usually in the range of 20-80 Shore D. These are typically used for applications where more rigidity and less flexibility are required.

The choice of Shore hardness depends on the specific application and the flexibility or rigidity required for the Molds. Softer Shore A values are suitable for replicating intricate details and for Molds that need to be flexible for easy demoulding. Firmer Shore A values or Shore D values are used when the mold needs to maintain its shape and resist deformation during casting processes.

Quick Enquiry

If you need help or a quote regarding any of our processes, materials or capabilities, please contact us on +44 (0)1903 235784 or complete the quick enquiry form below.

Silicone Moulding Compound Enquiry

Privacy Policy

14 + 6 =

Why C&W Seals?

C&W Seals constantly review our activities to allow us to provide the latest products & manufacturing techniques in the marketplace. Our highly-trained staff specialise in the manufacturer of tailor-made products to meet specific customer specifications.

By regularly benchmarking our material prices we can guarantee new and current clients the best possible prices as well as bringing our clients the latest products with our forward thinking and dedicated mindset.

Need Help?

If you can't find the answer that you need, or would just like to speak to someone about any of our processes, mateials or capabilities, then please do get in touch.


+44 (0)1903 235784



Request a quote and we'll send it back within 24 hours

If you need a quote for Material Conversion, please complete our quote request form and we will send a quote back within 24 hours.