Premium Fast Translucent Silicone for Professional Prototyping
Wacker Elastosil Vario 15 Fast is a 2-component, platinum-cure (addition-curing) casting silicone with exceptional softness (Shore A 15) and very fast curing (15 minutes demoldable). This high-quality translucent silicone combines very low viscosity (5,000 mPa·s) with minimal shrinkage (<0.1%) and excellent mechanical properties, specifically developed for rapid prototyping where visual control is essential. Food-contact compliant according to BfR and FDA guidelines. Easy 10:1 mixing ratio.
Key Benefits
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Very fast curing: 2 minutes pot life, 15 minutes demoldable at 20°C for rapid production and short lead times
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Translucent for visual control: Cast objects remain visible for precise positioning and precision cutting during prototyping
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Shore A 15 softness: Very flexible and soft for easy demolding and delicate details
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Platinum-cure technology: Minimal shrinkage (<0.1%), no inhibition with most substrates, food-contact compliant to BfR and FDA
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Very fluid and self-deaerating: 5,000 mPa·s viscosity for perfect detail reproduction without vacuum treatment
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Adjustable properties: Hardness and speed adjustable by mixing with Vario 40 and/or Normal catalyst - see mixing charts
Typical Applications
- Rapid prototyping where visual control during mold cutting is essential
- Food-safe molds for chocolate, confectionery, fondant, and culinary creations (after post-curing)
- SFX and prosthetics: molds for masks, facial applications, and special effects
- Podiatry applications and medical models where softness and speed are required
- Pad printing pads and flexible printing applications in the graphic industry
- Molds for polyurethane, epoxy, polyester, and acrylic resins where transparency is required
Processing Instructions:
- Carefully mix component A and B in a 10:1 ratio (by weight) manually or mechanically
- Stir slowly in a figure-8 motion to prevent air entrapment
- Process the mixture within the 2-minute pot life
- Wait to demold until fully cured (15 minutes at 20°C)
- For food-safe applications: post-cure for 2-3 hours at 100-140°C to fully outgas
- Curing can be accelerated by heating - note: air bubbles have less time to escape
Customization Options:
🧪 EL ASTOSIL VARIO MIX
Mixing Calculator for Your Perfect Silicone
Calculate exactly how much Elastosil Vario 15, Vario 40, Catalyst Vario F (fast) and Normal you need.
All values at 20 °C. Temperature has a big influence!
Disclaimer: This calculator is merely a tool and provides an estimate based on the graph from the manual. Actual processing time and curing time may vary due to temperature, mixing technique, humidity, or other factors. Siliconesandmore accepts no liability for differing results. Always perform a small test mix first and consult the official manual.
Tip: Purchase the kits separately if you want to adjust both hardness and speed.
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Adjusting Hardness: Mix A-component of Vario 15 with Vario 40 for any desired hardness between Shore A 15-40 (e.g., 50/50 mix = approx. Shore A 27.5)
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Adjusting Speed: Mix Fast B-component (15 min) with Normal B-component (6 hours) for intermediate curing times - see graph in datasheet
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Please note: Total B-component must always be 10% of the weight of the total A-component
Wacker Chemie is a world leader in silicone technologies for professional mold making, prototyping, and food-safe applications with over 100 years of expertise.
⚠️ What the compliance statements do and do not say
Wacker states BfR and FDA compliance for Elastosil Vario 15. That is a food-contact statement. It is explicitly not a statement of skin safety, biocompatibility or suitability for prolonged contact with mucous membranes. We do not use the term skin-friendly as a certification, because no such certification exists at raw material level.
If you are manufacturing a product with prolonged body contact, the assessment sits with you as the manufacturer of the finished article. Have the cured finished product tested by an accredited laboratory, as a minimum to ISO 10993-5 and ISO 10993-10. Contact us if you would like to discuss this.
Important Warning: Inhibition with Addition-Cure Silicones
Please note: This is an addition-cure silicone (platinum-cure). These silicones can be inhibited by sulfur, nitrogen, amino compounds, and metal salts. If you are unsure whether the products you are using (including gloves, spatulas, and cups) contain these ingredients, first conduct a small test. These substances are found, among other things, in many latex gloves, some plasticines, paints and glues, condensation-cure silicones, 1-component silicone sealant, natural rubbers, and 3D printing material (especially stereolithography). If you wish to use these, you will need to apply a protective layer of polyvinyl alcohol (PVA).
Professional Support
Our technical specialists advise on material selection, hardness adjustments, speed adjustments, and optimal results for your specific rapid prototyping or mold application. Contact us for technical datasheets, processing guidelines, or advice on the Wacker Vario modular system.
