TFC Silicone Rubber Type 12 is a medium-hard addition-curing silicone that is very suitable for demanding, elastic and hard-wearing moulds with pronounced undercuts. This material can be used to produce single or multi-part moulds and can be used for casting original models from concrete, clay, wood, glass, metal, plastic, wax or ceramic casting compounds.
TFC Silicone Rubber Type 12 is particularly resistant to certain types of casting resins. Thanks to its extremely good mechanical properties, the moulds made from it are very flexible and resistant to breakage and tearing.
In addition to the excellent casting resins from the Moertelshop, all water-based casting materials such as Stewalin, Plastalin Super, Keraflott, Keramin, Alabit, modelling and modelling plaster and casting clay can also be cast in the moulds produced. Soap moulding compounds (soap glycerine), waxes for the production of candles and casting resins (resin) are also possible when using our suitable release agents and additives.
The two components are mixed in a weight ratio of 1:1. The mixture has very good fluidity and is therefore easy to pour. The mould produced in this way has a high degree of rigidity and flexibility, a very high level of detail in the reproduction and excellent non-stick properties, which make it easier to remove the models from the mould.
Technical data:
Colour: white (component A) and white (component B)
Mixing ratio: 1:1 by weight
Specific weight: 1.1 g/cm³
Viscosity: 5000 - 7000 mPas
Mixing time at 23°C: 1 minute
Processing time (pot life) at 23°C: 70 - 90 minutes
Curing time (demoulding time) at 23°C: 6 - 8 hours
Shore A hardness after 24 hours: 30 ± 2
Breaking load (tensile strength): 5.5 ± 0.2 N/mm²
Elongation at break: 500 ± 20 %
Tear strength: 18 ± 1 N/mm
Heat resistant (short term) up to: 200°C
Reproduction detail fidelity: 5 µm
Dimensional change after 24 hours: 0.05 %
Shelf life: at least one year
Attention: When working with addition-curing silicone rubbers, make sure to use clean and dry containers. The surface of the object to be moulded should also be as dry and free of impurities as possible. Certain substances can prevent or slow down the curing of addition-curing silicone. These include condensation-curing silicones, organic rubbers, plasticisers, amines, heavy metals and sulphur-containing kneading compounds. At the contact surfaces between the addition-curing silicone and the above-mentioned substances, vulcanisation disorders occur, which render the mould and often also the model unusable. In case of doubt, it is strongly recommended to check the material compatibility in a small preliminary test.
OUR TIP: When selecting the right impression material for your application, please also refer to our TROLL COMPARISON TABLE. All silicone compounds from the extensive TROLL-FACTORY range that are available in the Moertelshop are listed there.
For container sizes up to 2 kg, the silicone is supplied in high-quality plastic squeeze bottles with a dosing cap. This makes dispensing very easy and clean, and exact dosing is effortless, as you would expect from comparable food packaging, for example. This is a significant improvement over the usual cans or wide-neck bottles.
Buy professional moulding compounds and accessories for art, design, construction and handicrafts with concrete from us at a fair price and take advantage of our unbeatable low-cost shipping.
