CASTEX microfusion silicones

CASTEX high-strength Microfusion Silicones are specially designed for making molds for Microfusion by the lost wax method, both for jewelry and costume jewelery and for industrial applications in steel.

CASTEX microfusion silicone range:

It comes in convenient 370x195x95 mm boxes. containing 5,200 kg of silicone approx. (depending on the density) laminated in 7 sheets of 320x170x10 mm. We can manufacture special formulations with colors and presentations on demand.

Properties of our CASTEX microfusion silicones:

EASY TO WORK: They have a low viscosity when raw, which allows the piece to be embedded and placed in the mold simply by pressing with your fingers. It supposes an important saving of time.
THEY DO NOT NEED POWDER OR RELEASE SPRAY: The waxes are released instantly and without using talc or spray, due to the quality of the silicone and its elasticity.
EASY TO CUT: They are easier to cut than conventional rubber. They are very soft when cut with a scalpel. They also allow making molds of 2 or more parts using fine talc as separator-release agent.
HIGH TEAR RESISTANCE: Allows the most difficult cuts thanks to its high tear resistance, its high elasticity and recovery from deformation.
HIGH GLOSS FINISH: If the original is glossy, the wax prints also have a glossy finish.
LESS SHRINKAGE: CONIEX® silicone molds have less shrinkage than usual rubbers, between 2.5% and 3%.
HIGH RESISTANCE TO AGING: The molds made with these silicones remain in perfect condition for many years.

How to use our CASTEX microfusion silicones:

Vulcanization temperature: In the case of CASTEX SM40/120 and CASTEX SM43/120 Microfusion Silicones, the temperature is 115º-120ºC, therefore with CASTEX® the energy cost is lower. In the case of SM45/160 and SM50/160 Microfusion Silicones, the temperature is 160ºC.

Storage conditions: CASTEX® Microfusion Silicone must be stored in a cool place away from light sources, always at a temperature below 30º C. Especially in the case of SM-40/120 and SM-43/120 Microfusion Silicones.

Making the mould: a mould can be made using any technique, and the CASTEX Microfusion Silicone can also be kneaded as many times as necessary, ensuring that there are no large air pockets inside. You have to work with parts and hands free of fat. CASTEX Microfusion Silicone molds cannot be “burned” to make the feeding channel. This technique must be replaced by adding a stud to the original or by cutting the feed with the scalpel in a “V” shape.

TOXICITY of our CASTEX MICROFUSION SILICONE It is not a toxic or corrosive product. During vulcanization, some vapor is released that can be mildly and temporarily irritating to the respiratory tract in people who are sensitive to the product. Lightly ventilate the area. Request our Security Sheet. Our Technical Department is at your disposal for any questions you may have.