PlatSil FS-20 – Fast Platinum-Cure Silicone for Mold Making & Prototyping
PlatSil FS-20 – Fast Platinum-Cure Silicone for Mold Making & Prototyping
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Ordered and paid on a working day: usually ships the same day
Delivery to Netherlands: usually within 1 working day
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Premium Fast Platinum-Cure Silicone Rubber for Professional Applications
PlatSil FS-20 is a fast platinum-cured silicone rubber from Polytek Development Corp. with a Shore OO66/A20 hardness and a low viscosity of 3,800 cP. This 1A:1B system (by weight or volume) is developed for moulds and prototypes where fine detail reproduction and a short turnaround time are decisive: pour time 8 minutes, demould after 25 minutes.
Key Benefits
- Low viscosity: 3,800 cP for excellent detail reproduction and easy pouring without vacuum equipment.
- Very short turnaround: pour time 8 minutes, demould after 25 minutes at 23°C.
- Milky white appearance: Milky white after curing.
- Chemically stable: Non-reactive under normal conditions.
- Professional use: Developed for industrial and professional applications with consistent batch quality.
- Easy processing: 1A:1B mixing ratio by weight or volume, no complex calibration required.
Typical Applications
- Moulds that need to be made quickly
- Moulds for polyester, epoxy, and polyurethane
- Industrial moulds for repeatable use in production environments
- Educational and craft applications
Technical Characteristics
PlatSil FS-20 is mixed in a 1A:1B ratio by weight or volume. Shore hardness: OO66/A20. Mixed viscosity: 3,800 cP. Pour time: 8 minutes. Demould: 25 minutes at 23°C. Specific gravity: 1.11. Tensile strength: 467 psi. Elongation at break: 626%. Tear strength: 148 pli (Die B), 53 pli (Die T). Colour after curing: milky white. Flashpoint: >150°C – this is a safety property of the uncured components and says nothing about the heat resistance of the cured rubber. Store at 15–32°C in unopened original packaging; use within six months. According to the EU safety data sheet, component A is classified as harmful to aquatic life with long-lasting effects (H412). Source: Polytek Technical Bulletin PlatSil® FS-Series, revision 09-12-2020.
Food contact
For PlatSil FS-20 we hold no declaration or test report for contact with foodstuffs. Polytek does not list this product among the silicones that comply with 21 CFR 177.2600. We therefore make no food-safety claim for this product. If you need silicones where that evidence does exist, look at Silicone Culinary (tested by TÜV Rheinland in accordance with § 31 LFGB, result Pass) or at the Wacker addition-cure silicones for which Wacker issues a food-contact statement, such as the FX range (EU regulations) and Vario 15 and Vario 40 (FDA 21 CFR 177.2600).
Polytek Development Corp. is an American specialist in polyurethane and silicone systems for professional mould making and industrial casting, with over 40 years of experience in the sector.
Professional Support
Do you have technical questions about mixing ratios or specific applications? Our team is ready with product-specific advice based on your project. Contact us for personal guidance.
Product Properties
- Hardness20Shore AHardness of the silicone material
- Hardness66Shore 00Very soft hardness
- Shrinkage0.0%Linear shrinkage after curing
- ColorMilk whiteColor of the finished product
- TransparencyOpaqueDegree of transparency
- Viscosity3800mPa·sViscosity of the uncured silicone
- Density1.11g/cm³Density of the cured material
- Mix ratio1:1Mixing ratio A : B
- Tensile strength3.219MPaMaximum tensile force before breaking
- Tear strength26.0kN/mResistance against tearing
- Elongation at break626%Maximum stretch before breaking
- Pot life8minutesWorking time after mixing
- Cure time25minutesTime until full cure
Electrical Properties
- Electrically insulatingYesPrevents electric current flow
Certification & Safety
- Chemical resistanceGood — suitable for casting polyester, polyurethane and epoxyResistance to chemicals
- Moisture resistantYesResistant to moisture and water absorption
Application
- Use caseMaking moulds, casting polyurethane, epoxy and polyesterIntended use
- Silicone type["Addition curing","RTV-2"]Type of silicone or polymer
- Cure speedFastHow quickly the material can be demoulded
Safety Information
According to Polytek's EU safety data sheet, component A is classified as harmful to aquatic life with long-lasting effects (H412). No signal word or hazard pictogram applies. Component B is not classified as hazardous. Avoid release to the environment (P273) and dispose of residues and packaging via an approved waste disposal company (P501). Wear nitrile or butyl rubber gloves and safety glasses while working, and work in a well-ventilated area. Always consult the supplied safety data sheet (SDS) for full information on hazards, handling, storage and first aid.| Safety Pictograms | Safety Data Sheets (SDS) |
|---|---|
Required protection (ISO 7010)
  |
| Signal Word | H‑code | Hazard Statement | P‑codes | P‑statements |
|---|---|---|---|---|
| Warning | H412 | Harmful to aquatic life with long lasting effects | P273 P501 |
|
Technical data sheets
Frequently asked questions
What is the delivery time for my order?
Orders placed and paid on working days are in most cases shipped the same day. Weekend orders are processed on the next working day.
Indicative delivery times: Netherlands usually within 1 working day, Belgium and Germany typically 1–2 working days, other countries depending on destination and carrier. These are guidelines, not guarantees: peak periods, public holidays or carrier delays can have an effect.
What is the return policy?
You have 30 days to return after receipt. Email info@siliconesandmore.com within 30 days of delivery with your name and order number. The full conditions are in our return policy.
How can I track my order?
As soon as your order has shipped, you'll receive a track & trace code by email. It can take up to 24 hours before the code is active.
I have a problem with my order – how do I reach you?
Contact us via our contact page or email info@siliconesandmore.com. We're happy to help you quickly.
Can I order as a business?
Yes. Apply for a business account; we review your application within 3 working days. After that you order while logged in and pay on invoice, with payment terms of 14 days after delivery.
EU businesses outside the Netherlands with a valid VAT number order with VAT reverse-charged (0%, intra-community supply). The VAT number is stored in your business account; it cannot be added to an order after it has been placed.