This hardener works on all condensation silicones and is especially intended for the Wacker M 4503 condensation silicones. The T-35 is easy to mix with the T-47 for shorter curing times.
Processing
The condensation hardening silicone can be easily mixed by hand or machine. Mix the A and B components carefully and in the specified ratio.
T35 mixture = 5%, so for 100 grams of A component you use 5 grams of Wacker T35 hardener (B component).
You can use 0.5% less or more hardener. If you use less hardener, the curing takes longer and air bubbles have more time to escape. Be careful not to use too little hardener, because then the silicone may not harden (properly). With more hardener, the curing will go faster, so the mold is ready sooner. The disadvantage is that the mold will also age sooner and will shrink more.
Process the mixture within the pot life (processing time) and never mix more than you can process within the pot life. Wait with de-moulding until the whole has completely hardened.
Please note: Potlife (processing time) and de-moulding time are strongly dependent on the mixing ratio and humidity! When adding more silicone B (hardener) or at higher humidity the potlife and de-moulding time will be shorter!
Ironing, spreading or spatulating
If you want to spread/spat/irone the silicone onto something, you can add Thixo C (0.6%-2%) (usually 1%). Thixo C is a thickener and makes it possible to spread the silicone. You should take into account that the mold must be provided with a support cap in this case. This support cap can consist of plaster bandage, an epoxy support cap, or acrylic resin with thickener and glass fabric /
Shelf life
Provided the silicone is stored in a closed container, cool and frost-free, the shelf life is at least 1 year.
Safety requirements
Wear 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
Signal word Warning
H-Code hazard statements
H227 Flammable liquid.
H318 Causes serious eye damage.
H360FD May damage fertility. May cause harm to the unborn child.
H373 May cause damage to organs through prolonged or repeated exposure.
P-Code precautions
P201 Obtain special instructions before use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P260 Do not breathe mist/vapours/spray
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P308+P313 IF exposed or concerned: Get medical advice/attention.
P310 Immediately call a POISON CENTER/doctor/first aid worker.
P370+P378 In case of fire: Use alcohol-resistant foam or normal protein foam to extinguish
P403 Store in a well-ventilated place.
P405 Store locked up.
P501 Dispose of contents/container to authorised hazardous or special waste collection point in accordance with any local regulation..
Documentation
SDS WACKER T35 CATALYST EN.pdf
WACKER Catalyst T series for moldmaking.pdf
