PlatSil® HTS-40 – High-Strength Silicone Casting Rubber for Mould Making & Production
PlatSil® HTS-40 – High-Strength Silicone Casting Rubber for Mould Making & Production
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Variant: 0.55 kg. Set
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Premium Silicone Casting Rubber for Professional Applications
PlatSil® HTS-40 is a two-component, platinum-catalysed silicone rubber (RTV) from Polytek Development Corp., developed for demanding production environments where higher hardness is required. With Shore A40, excellent tear strength and good chemical resistance, this rubber delivers reliable performance with repeated demoulding and intensive use.
Key Benefits
- Shore A40 hardness: Sturdier moulds for applications that require more structural rigidity.
- High tear strength (131 pli, Die B): Withstands intensive use in high-volume production environments.
- Excellent release: No release agent is needed in most applications.
- Good chemical resistance: Suitable for casting polyesters, polyurethanes, epoxies and more.
- No shrinkage on curing: Excellent dimensional accuracy for precision parts.
- Adjustable working time: Compatible with accelerators (Part X) and retarders (Part R).
Typical Applications
- Mould making for polyurethane, epoxy and polyester casting materials
- Industrial prototyping: accurate reproduction of stiffer parts
- Architectural restoration: reproduction of ornamental details in concrete or plaster
- Art casting and sculpture: sturdy moulds for repeated use
- Production of technical parts with tight tolerances
Technical Specifications
Mix ratio 1A:10B (by weight). Shore hardness A40, mixed viscosity 17,000 cP, pour time 30 minutes, demould after 24 hours at 77 °F. Cured colour: milky white. Specific gravity 1.11, elongation 831%. Can be thickened with PlatThix or fumed silica for brush-on applications.
Manufactured by Polytek Development Corp. (Easton, PA, USA) – specialists in professional casting and mould-making materials for industry, art and manufacturing.
Professional Support
Do you have questions about the correct application, mix ratio or compatibility with your model or casting material? Our technical team is ready to give tailored advice for your specific project.
Product Properties
- Hardness40Shore AHardness of the silicone material
- Shrinkage0.0%Linear shrinkage after curing
- ColorWhiteColor of the finished product
- TransparencyOpaqueDegree of transparency
- Viscosity17000mPa·sViscosity of the uncured silicone
- Density1.11g/cm³Density of the cured material
- Mix ratio1:10Mixing ratio A : B
- Tensile strength4.73MPaMaximum tensile force before breaking
- Tear strength23.0kN/mResistance against tearing
- Elongation at break831%Maximum stretch before breaking
- Pot life30minutesWorking time after mixing
- Cure time1440minutesTime until full cure
Component Properties
- Color AClear/transparentColor of component A
- Color BMilky white/translucentColor of component B
- Viscosity A1200mPa·sViscosity of component A
- Viscosity B28000mPa·sViscosity of component B
- Density A0.96g/cm³Density of component A
- Density B1.12g/cm³Density of component B
Electrical Properties
- Electrically insulatingYesPrevents electric current flow
Certification & Safety
- Chemical resistanceGoodResistance to chemicals
- Moisture resistantYesResistant to moisture and water absorption
Application
- Use caseDie & mould makingIntended use
- Silicone type["Addition cure","RTV-2"]Type of silicone or polymer
- Cure speedNormalHow quickly the material can be demoulded
Safety Information
Component A is classified as irritating to skin and eyes: it causes skin irritation (H315) and serious eye irritation (H319). Signal word: Warning. According to Polytek's European safety data sheet, component B is not classified as hazardous. Wear protective gloves, for example nitrile, and eye protection, and wash your hands thoroughly after work. In case of skin contact, wash with plenty of soap and water. In case of eye contact, rinse cautiously with water for several minutes and remove contact lenses if possible. If irritation persists, consult a doctor. 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 | Causes serious eye irritation | - | - | |
| Warning | Causes skin irritation | - | - |
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.