This silicone is very suitable as a mold for casting pewter miniatures or for making your own fishing weights and hooks (fishing lure).
- Color: reddish brown
- Easy to mix
- Briefly heat resistant up to 380°C
- Very hard, Shore (A) 60
Specifications
- Mixing ratio (weight): A:B = 100:2
- Processing time at 20°C: 40 minutes
- De-moulding time at 20°C: 4 hours
- Full strength after: 3 days
- Hardness: Shore A 60
- Viscosity @ 23°C: 11,000 mPa
- Tensile strength: 45 kg/cm2
- Color: reddish brown
Description
The high temperature silicone Condensation HT 60 is a 2-component (polycondensation) casting silicone which hardens at room temperature.
This silicone is produced under the name Wacker Elastosil 4470 with the hardener T 40. The silicone is highly filled and suitable for producing high-temperature molds. These molds can be used to cast casting compounds with a melting point up to 380°C. Examples include zamak, tin, or lead. However, the high fill level makes the silicone brittle and therefore only suitable for molds with few to no undercuts.
Processing
Silicone Condensation HT 60 can be easily mixed by hand or by machine. The fillers in the A component must be thoroughly mixed before use.
Mix the components carefully and in the specified ratio. Use the mixture within its pot life and wait until it has fully cured after approximately 4 hours before demoulding. After demoulding, place the rubber in an oven (150°C) for 2-3 hours to allow any vapors to escape (post-curing). Make the mold as thin as possible.
Note: Pot life and demold time depend heavily on the mixing ratio and humidity! Adding more than 2% silicone B (hardener) or at higher humidity will shorten the pot life and demold time.
Before pouring, dust the mold with talcum powder or graphite powder to ensure the tin, lead, or zamak flows smoothly and to prevent imperfections in your cast. Also, ensure the mold is heated before pouring. Place the mold on a surface that conducts heat well.
Shelf life
Provided the silicone is stored in a sealed container at a temperature of 10-25°C, the shelf life is at least one year. If the A-component has been stored for a long time, stir the fillers thoroughly before using the silicone.
Safety requirements
If you frequently work with silicone, it is recommended that you wear gloves and ventilate the area well during application. For safety instructions, always consult the safety data sheet.
H-Code hazard statements
H226 Flammable liquid and vapour.
H319 Causes serious eye irritation.
H332 Harmful if inhaled.
H335 May cause respiratory irritation.
H373 May cause damage to organs through prolonged or repeated exposure.
H413 May be harmful to aquatic life with long lasting effects.
P-Code precautions
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P243 Take precautionary measures against electrostatic charges.
P271 Use only outdoors or in a well-ventilated area.
P280 Wear protective gloves / protective clothing / eye protection.
P273 Avoid release to the environment.
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 present and easy to do. Continue rinsing.
P337 + P313 If eye irritation persists: Get medical advice/attention.
P370 + P378 In case of fire: Use water spray, extinguishing powder, foam or carbon dioxide to extinguish.
P403 + P235 Store in a well-ventilated place. Stay calm.
P501 Dispose of contents/container.
Documentation
Product information sheet Silicone Condensation HT 60 Set (Hard)
EN - Safety Data Sheet Wacker_Catalyst_T_40.PDF
EN - Safety Data Sheet Elastosil 4470.pdf
