Wacker Elastosil® Vario 15 Fast – Fast-Curing Translucent Platinum Silicone for Prototyping & Moulds

Premium Fast Translucent Silicone for Professional Prototyping

Wacker Elastosil Vario 15 Fast is a two-component, platinum-cure (addition-cure) casting silicone with exceptional softness (Shore A 15) and a very fast cure (demouldable after 15 minutes at 23 °C). This high-quality translucent silicone combines low viscosity (base material 5,000 mPa·s, mixed 3,000 mPa·s) with minimal shrinkage (<0.1%) and excellent mechanical properties, and was specially developed for rapid prototyping where visual control is essential. Food safe in accordance with BfR and FDA guidelines. Simple 10:1 mix ratio.

Key Benefits

• Very fast cure: 2-minute pot life, demouldable after 15 minutes at 23 °C for fast production and short turnaround times
• Translucent for visual control: Embedded objects stay visible for precise positioning and accurate cutting during prototyping
• Shore A 15: Very flexible and soft for easy demoulding and fine details
• Platinum-cure technology: Minimal shrinkage (<0.1%), food safe in accordance with BfR and FDA
• Very fluid: 3,000 mPa·s after mixing for good detail reproduction
• Adjustable properties: Hardness and speed can be adjusted by blending with Vario 40 and/or the Normal catalyst – see the mixing calculator below this description

Typical Applications

• Rapid prototyping where visual control while cutting the mould is essential
• Food-safe moulds for chocolate, sugarcraft, fondant and culinary creations (after post-curing)
• SFX and prosthetics: moulds for masks, facial appliances and special effects
• Podiatry applications and medical models where softness and speed are required
• Pad printing stamps and flexible printing applications in the graphics industry
• Moulds for polyurethane, epoxy, polyester and acrylic resins where transparency is required

Processing instructions:

1. Mix components A and B carefully in a 10:1 ratio (by weight), by hand or by machine
2. Stir slowly in a figure-of-eight motion to avoid trapping air
3. Use the mixture within the 2-minute pot life; vacuum degassing is not feasible with the Fast version
4. Wait until fully cured before demoulding (15 minutes at 23 °C)
5. For food-safe applications: post-cure at 140 °C for 2 hours for complete outgassing
6. Curing can be accelerated with heat – note: air bubbles then have less time to escape

Customisation options: use the mixing calculator below this description to work out how much Vario 15, Vario 40, Catalyst VARIO and VARIO F you need for your target hardness (Shore A 15–40) and working time (2–150 minutes).

Wacker Chemie is a global leader in silicone technology for professional mould making, prototyping and food-safe applications, with more than 100 years of expertise.

Important Warning: Inhibition of Addition-Cure Silicones

Please note: This is an addition-cure (platinum-cure) silicone. These silicones can be poisoned by sulphur, nitrogen, amine compounds and metal salts. If you are not sure whether the products you are using (including gloves, spatulas and cups) contain these substances, please carry out a small test first. They are found in, among other things, many latex gloves, some plasticines, paints and adhesives, condensation-cure silicones, one-component silicone sealants, natural rubbers and 3D printing materials (especially stereolithography). If you still want to use such materials, you will need to apply a protective layer of polyvinyl alcohol (PVA).

Professional Support

Our technical specialists can advise you on material selection, hardness adjustments, speed adjustments and achieving optimum results for your specific rapid prototyping or mould application. Contact us for technical data sheets, processing guidelines or advice on the modular Wacker VARIO system.