Silicone Condensation 20 Polyester – Molding Rubber for Polyester Molds & Composite Casting

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Silicone Condensation 20 Polyester – Molding Rubber for Polyester Molds & Composite Casting

✔ Flexible, Strong, good resistance to polyester
✔ White, Good Fluid, Bleeding
✔ Shore (A) 23 ~ 26
✔ Low shrinkage (<0.3%)
✔ 120 minutes working time
✔ Mix ratio (Weight) 100:5 Read more

€24,50 Incl. BTW
SKU: S11413
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    ✔ Flexible, Strong, good resistance to polyester
    ✔ White, Good Fluid, Bleeding
    ✔ Shore (A) 23 ~ 26
    ✔ Low shrinkage (<0.3%)
    ✔ 120 minutes working time
    ✔ Mix ratio (Weight) 100:5

    Size chart

    Premium Condensation Silicone for Professional Molds

    Silicone Condensation 20 is a tin-cure silicone rubber with a Shore A 20 hardness, specially developed for creating durable molds for polyester, epoxy, and composite casting. This liquid silicone delivers exceptional detail and combines flexibility with very high tensile strength for long-term use.

    Key Benefits

    • Excellent fluidity: Captures finest details and textures accurately
    • Very high tensile strength: Resistant to intensive use and repeated castings
    • Optimal flexibility: Shore A 20 hardness for easy demoulding
    • Polyester compatible: No inhibition when used with polyester resins
    • Reliable curing: Predictable processing time and consistent results
    • Cost-effective: Long life and high yield per mold

    Typical Applications

    • Molds for polyester and composite parts in the automotive and maritime industries
    • Props and set pieces for theatre, film and events
    • Sculptures, ornaments and architectural elements in plaster and concrete
    • Candle molds and soap molds for artisanal production
    • Prototypes and model building for product design
    • Precision foundry and art foundry applications

    Technical Features

    This condensation silicone is supplied as a two-component system, easy to use at room temperature. Its medium hardness (Shore A 20) offers the ideal balance between flexibility and dimensional stability. Suitable for both brush and pouring applications, depending on the complexity of the model.

    Note: Pot life (processing time) and demold time depend heavily on the mixing ratio and humidity. Adding more silicone B (hardener) or increasing humidity will shorten the pot life and demold time.

    Ironing, Smearing or Spatula

    For spreading, spatulating or smoothing silicone you can use Thixo C (0.6%-2%, usually 1%) . This thickener makes the silicone easy to spread. With this processing method, the mold must be provided with aplaster bandage support cap. epoxy support cap, or acrylic resin with thickener and glass fibre.

    Manufactured by Silicones and More , specialists in high-quality moulding rubbers and casting materials for professional makers.

    Professional Support

    Questions about processing time, mixing ratios, or application possibilities? Our technical team is happy to advise you on the right material for your project.

    Our story

    Our story began with our father, the founder of Nedform BV. We— Roel, Rutger, and Rob Collaris —are his sons and wanted to bring his passion and knowledge to the online world. That's how SAM (Silicones and More) was born—a creative space for everyone.

    Whether you're a beginner, an expert, or an enthusiastic DIYer looking for the right tools, materials, and some guidance, you've come to the right place. We've worked with silicones, resins, and casting materials ourselves for years. That's why we not only deliver quality but also genuine support—based on experience.

    • Small team with a great love for creating
    • Honest advice and reliable materials!
    • We help makers bring their ideas to life.

    More about us

    FAQs

    What is the delivery time of my order?

    Orders placed and paid for on business days will be shipped on the same day in most cases. Orders received on weekends will be processed on the next business day.

    We always do our best to ship orders as quickly as possible, but actual shipping times may vary due to high volume, stock availability, or carrier circumstances.

    Delivery time depends on the destination country and the carrier. Below is a general indication:

    • Netherlands: usually within 1 business day
    • Belgium & Germany: typically within 1–2 business days
    • Other countries: depends on the destination and the local carrier

    Please note: these are guidelines, not guarantees. The final delivery time may differ due to factors beyond our control, such as sorting center delays, public holidays, or exceptionally high volume.

    What is the return policy?

    We offer a 30-day return policy as an added service. If you'd like to return an item or if there's something wrong with your order, please email us at info@siliconesandmore.com with your name and order number within 30 days of delivery. We'll help you quickly. The full terms and conditions can be found on our returns page.

    How can I track my order?

    Once your order has been processed and shipped, you'll receive a track and trace code by email, allowing you to easily track your package. Please note that it can sometimes take up to 24 hours after processing for the track and trace to be active.

    I have a problem with my order, how can I reach you?

    If you have any questions or run into any problems, please feel free to contact us via our contact page or email us at info@siliconesandmore.com . We'll be happy to help you quickly.

    If you want an immediate answer, ask our chatbot. They have extensive knowledge of all our products and can often help you right away!

    Can I also order for business purposes?

    Yes, business orders are possible . Customers within the EU outside the Netherlands can order VAT-free with a valid EU VAT number (0 percent intra-Community supply).

    Enter your VAT number on the shopping cart page , not at checkout.

    Go to the shopping cart via the link below and enter your VAT number and email address, after which the VAT will be automatically removed.

    https://siliconesandmore.com/cart

    Please note that if you only enter your VAT number at checkout, it will not be processed correctly and VAT may still be charged.

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