Premium Transparent Platinum Silicone for Professional Mold and Prototyping Applications
Wacker ELASTOSIL® VARIO 40 Fast is a 2-component, addition-curing (platinum-cure) casting silicone with Shore A 40 hardness and a completely transparent color, specially developed for molds where fast turnaround times and visibility of the cast object are essential. The Fast variant offers a pot life of only 2 minutes and a demolding time of 15 minutes at 20°C – ideal for production environments where speed is a priority. This professional silicone combines excellent flowability (10,000 mPa·s), high tensile strength (8 N/mm²), food safety, and broad chemical resistance with unique adaptability via the VARIO system. Mixing ratio 10:1 (A:B).
Key Benefits
-
Ultra-fast curing (Fast): Pot life 2 minutes, demoldable after 15 minutes at 20°C – maximum production efficiency for series production
-
Completely transparent: The cast object remains visible in the mold for precise and accurate cutting – ideal for prototyping and complex geometries
-
Adjustable hardness via VARIO system: Mix VARIO 15 and VARIO 40 A-components for any desired Shore A hardness between 15 and 40
-
Adjustable curing speed: Combine Fast and Normal B-component for any desired curing time – total B always 10% of A-weight
-
Food-contact compliant: Platinum-cure technology without by-products, compliant with BfR XV and FDA 21 CFR 177.2600, suitable for culinary molds
-
High mechanical strength: 8 N/mm² tensile strength and 15 N/mm tear strength for durable, long-lasting molds
Typical Applications
- Series production of molds where fast cycle times are required
- Prototyping and rapid tooling: transparent molds for precise cutting of complex models
- Culinary molds for chocolate, confectionery, and food-safe applications (FDA compliant)
- Stamps and pad printing industry: high detail reproduction and chemical resistance
- Podiatry and medical simulation: molds and anatomical models
- Robotics, animatronics and textile: flexible silicone objects
Processing Instructions:
- Mix A and B components in a 10:1 ratio by weight
- Mix slowly in a figure-8 motion to minimize air entrapment
- Pour immediately – pot life is only 2 minutes; vacuuming is not recommended for the Fast variant
- Demold after 15 minutes at 20°C
- Recommended: post-bake at 100°C for 2-3 hours for complete degassing
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 significant 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 sets separately if you want to adjust both hardness and speed.
Wacker Chemie is a global leader in silicone technologies for professional mold making, food-safe applications, and industrial processes with over 100 years of expertise in platinum-cure silicones.
⚠️ What the compliance statements do and do not say
Wacker states compliance for this product for food contact: EC 1935/2004, BfR XV Silicones (volatiles max 0.5 %, extractables max 0.5 %) and FDA 21 CFR 175.300 and 177.2600. Wacker further declares that phthalates, bisphenols, PVC, PFAS, SCCP, heavy metals, latex and fragrances, among others, are not intentionally introduced, that the product is not of animal or human origin, is not derived from GMOs and does not undergo irradiation, and that the substances listed in the toy standards EN 71-3 and EN 71-9 and in CPSIA are not intentionally introduced.
This is not a statement about skin contact or biocompatibility. We do not use the term skin-friendly as a certification, because no such certification exists at raw material level. Wacker itself notes that regulatory sanctioning of the ingredients does not imply the finished product is considered safe, and that responsibility for the finished article and for migration, extraction and volatile testing rests with its manufacturer.
Note for body-contact applications: the WACKER SILICONES HEALTH CARE POLICY generally does not permit use in contact with the genital mucosa, generally excludes applications of more than 30 days, and assesses contraceptive and reproductive devices case by case. If you are working on such a product, contact us before ordering.
Professional Support
Our technical specialists advise on hardness-mixing, curing speed, processing techniques, and optimal results for your specific mold, prototype, or stamping application. Contact us for technical datasheets, processing manuals, or advice on the VARIO system.
