Wacker Catalyst T 47® – Curing Agent for Condensation Silicones & Mold Making
Wacker Catalyst T 47® – Curing Agent for Condensation Silicones & Mold Making
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Premium Fast Catalyst for Professional Mold-Making and Model-Making Applications
WACKER® Catalyst T 47 is a very fast tin catalyst (curing agent) for all condensation-curing RTV-2 silicones. The thin, yellowish liquid (viscosity 1.6 mPa·s, density 1.02 g/cm³) strongly accelerates curing and is dosed at 1 to 2 % relative to the A component. T 47 can be used neat for maximum speed, or blended with a standard catalyst such as T 21 (polyurethane resin resistance) or T 51 (polyester resin resistance) to set any curing speed while retaining that catalyst's properties. This lets you control pot life and demolding time across a wide range, from a few minutes to over an hour. The catalyst is intended for producing flexible molds and printing pads based on condensation RTV-2 silicones.
Key Benefits
- Very fast curing – as the fastest catalyst in the WACKER T series, T 47 used neat (1.5 %) reduces demolding time to 1 to 2 hours.
- Low dosage of 1 to 2 % – a small amount is enough, so the properties of the silicone system are largely retained.
- Freely blendable – miscible with T 21 or T 51 (for example 90:10) to fine-tune speed and resin properties exactly to your application.
- Wide adjustable range – pot life adjustable from a few minutes up to about 120 minutes and cure time from 1 to 24 hours at room temperature.
- Universally applicable – suitable for all condensation-curing ELASTOSIL® M/RT silicones and comparable RTV-2 systems.
- Colorable for mixing control – the yellowish tint and optional color addition make visual control of a homogeneous mix easy.
Typical Applications
- Accelerating condensation silicones for making flexible molds
- Molds for casting polyurethane and polyester resins
- Model-making and prototyping where short demolding times are desired
- Production of printing pads (pad printing)
- Molds for concrete, plaster, wax and candles
- Props, set building and art casting with condensation silicones
Processing Instructions
- Stir the A component (silicone) thoroughly before use.
- Weigh the catalyst accurately: 1 to 2 % T 47 by weight of the A component (so 1 to 2 grams T 47 per 100 grams A). For slower curing with more time for air to escape, dose towards 1 %; for faster curing, towards 2 %. Never use too little catalyst, as the silicone will then cure insufficiently.
- For a controlled speed while retaining resin resistance: blend T 47 with T 21 or T 51 (for example 0.5 gram T 47 with 4.5 grams T 21 or T 51 per 100 grams A).
- Mix the A component and catalyst thoroughly and homogeneously.
- Pour the mixture within the pot life and never prepare more than you can process within that time.
- Allow the whole to cure completely before demolding. Pot life and demolding time depend strongly on dosage and humidity: more catalyst or higher humidity shortens both.
Wacker Chemie AG is the world market leader in the development and production of silicones for industrial and technical applications.
Professional Support
Unsure about the right dosage or blend ratio for your condensation silicone? Our specialists are happy to help you find the right balance between pot life and curing speed. Feel free to contact us for tailored advice.
Product Properties
- ColorYellowColor of the finished product
- Viscosity2mPa·sViscosity of the uncured silicone
- Density1.02g/cm³Density of the cured material
Physical Properties
- Flash point34°CMin. temperature at which the product ignites
- Ignition temperature215°CTemperature at which the product self-ignites
- Boiling point100°CBoiling point at atmospheric pressure
- Vapour pressure<12.5hPaVapour pressure at 20°C
Certification & Safety
- Chemical resistanceReacts with water, bases and acids forming ethanolResistance to chemicals
Application
- Use caseVery fast catalyst for accelerating all condensation-curing RTV-2 silicones in the production of flexible moulds and printing padsIntended use
- Silicone type["Auxiliary material"]Type of silicone or polymer
- Cure conditionRoom temperatureCondition under which the material cures
- Application method["Mix with A component","Dose by weight","Mix manually or mechanically"]How the product is applied
- Dosage ratio1 to 2% by weight of the A componentRecommended dosage ratio
- Reaction timePot life from a few minutes up to about 120 minutes, depending on dosage and humidityRequired reaction/flash-off time
Safety Information
WACKER Catalyst T 47 is classified as hazardous. The product is a flammable liquid and vapour (flash point 34 degrees Celsius), causes serious eye irritation, is harmful if inhaled and may cause respiratory irritation. It is also suspected of damaging the unborn child and may cause damage to organs through prolonged or repeated exposure. Keep the product away from heat, sparks and open flame and do not use it near pregnant women. When using, wear chemically resistant gloves (nitrile or butyl), close-fitting safety goggles and protective clothing. Work in a well-ventilated area and avoid inhaling vapour or mist. Wash hands thoroughly after use and do not eat, drink or smoke while working with this product. Always consult the Safety Data Sheet (SDS) for full information on safe use, storage and disposal.| Safety Pictograms | Safety Data Sheets (SDS) |
|---|---|
GHS hazard pictograms
  
Required protection (ISO 7010)
   |
| Signal Word | H‑code | Hazard Statement | P‑codes | P‑statements |
|---|---|---|---|---|
| Warning | H226 | Flammable liquid and vapour | P210 P233 P280 P303+P361+P353 P370+P378 |
|
| Warning | H302 | Harmful if swallowed | P264 P270 P301+P310 |
|
| Warning | H319 | Causes serious eye irritation | P264 P280 P305+P351+P338 P337+P313 |
|
| Warning | H332 | Harmful if inhaled | P261 P271 |
|
| Warning | H335 | May cause respiratory irritation | P261 P271 |
|
| Warning | H361d | Suspected of damaging the unborn child | P201 P202 P280 P308+P313 P405 P501 |
|
| Danger | H372 | Causes damage to organs through prolonged or repeated exposure | P260 P264 P270 P314 P501 |
|
| Warning | H373 | May cause damage to organs through prolonged or repeated exposure | P260 P501 |
|
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?
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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.