This hardener works on all condensation silicones. This hardener is extremely fast.
If you want to work very quickly, we recommend using this special B component: Wacker T47 (1-2%).
This B component may also be mixed with other condensation B components to achieve a desired rate with the properties of the other B components. Common mixtures are:
10% T47 with 90% T21, So on 100 grams of A comes 4.5 grams of T21 with 0.5 grams of T47
or
10% T47 with 90% T51, So on 100 grams of A comes 4.5 grams of T51 with 0.5 grams of T47
Processing
You can easily mix the silicone condensation 20 or the 3481 or other condensation silicones by hand or machine. Mix the A and B components carefully and in the specified ratio.
T47 = 1-2%, so on 100 grams of A you use 1 to 2 grams of T47
You can use 0.5% less or more harder. If you use less harder, the curing takes longer and air bubbles have more time to escape. Please note that not too little hardener is used, because the silicone may then no longer harden (properly). With more harder, the hardening will go faster, so that the mold is ready sooner. The disadvantage is that the mold will also age earlier and will have more shrinkage.
Process the mixture within the pot life (working time) and never make more than you can process within the pot life. Wait with demoulding until the whole has hardened completely.
Note: Pot life (processing time) and de-moulding time are strongly dependent on the mixing ratio and air humidity! When adding more silicone B (harder) or at higher humidity, the pot life and de-moulding time become shorter!
Brush or spread
If you want to spread/brush the silicone onto something, you can add Thixo C (0.6%-2%) (usually 1%). Thixo C is a thickener and makes it possible to spatulate the silicone. You should take into account that in this case the mold must be provided with a support cap. This support cap can consist of a plaster cast, an epoxy support cap, or acrylic resin with thickener and glass fabric /
shelf life
Provided that the silicone is stored in closed packaging, cool and frost-free, the shelf life is at least 1 year.
Safety requirements
Use splash goggles, suitable liquid-tight gloves, an apron and work in a well-ventilated area. See Safety Data Sheet for more information
Further important safety information
H-Code hazard statements
H226 Flammable liquid and vapour.
H319 Causes serious eye irritation.
H332 Causes serious eye irritation.
H335 Harmful if inhaled.
H361d
Suspected of harming the unborn child.
H372
Causes damage to organs through prolonged or repeated exposure.
H413
May cause long lasting harmful effects to aquatic life.
P-Code Precautions
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. Do not smoke.
P233 Keep container tightly closed.
P260 Do not breathe vapour/aerosol.
P271 Use only outdoors or in a well-ventilated area.
P273 Avoid release into the environment.
P280 Wear protective gloves/protective clothing/eye protection.
P243 Take measures to prevent discharges of static electricity.
P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P312 Call a POISON CENTER/doctor if you feel unwell.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. remove contact lenses, if possible; keep rinsing.
P337+P313 If eye irritation persists: consult a doctor.
P370+P378 In case of fire: extinguish with water jet, extinguishing powder, foam or carbon dioxide.
P403+P235 Store in a well-ventilated place. Keep cool.
P501 Dispose of contents/packaging for disposal.
Documentation
Product data sheet Silicone Condensation 20
EN - Safety data sheet Wacker Catalyst T 47.pdf
WACKER Catalyst T series for moldmaking.pdf
