Magikmold® P-508 is a platinum-cured, room temperature curing (RTV), translucent silicone rubber designed for the manufacture of high-performing, flexible molds. This two-part (Catalyst & Base), liquid silicone rubber has a Shore Hardness of A8, a pour time of ~20 minutes, and a demold time of ~3-4 hours.
This very soft silicone is popular for making molds of highly detailed and delicate objects (e.g., candle and soap molds).
Magikmold® P-525 molds are commonly used to cast the following materials:
- Urethane (polyurethane) plastic and rubber
- Polyester Casting Resin
- Cement, Concrete
- Low-Melt Metals
Release agent is not necessary for casting most materials into Magikmold® P-500 Series molds, but for longer mold life with epoxy, polyurethane or polyester resins, a barrier coat or release agent (e.g., Stoner E-236 Urethane Mold Release) is recommended.
This is a pourable rubber, but it can be easily thickened with silicone thickener for brush-on application.
|Mix Ratio by Weight||1A:1B|
|Pot Life||20 min.|
|Demold Time @ 77°F||3-4 hr.|
|Mixed Viscosity||2,400 cP|
|Specific Volume||26.6 in³/lb|
|Tensile Strength||185 psi|
|Die B Tear Strength||35.4 pli|
|Die T Tear Strength||11.8 pli|
CURE INHIBITION: Contamination from amines, sulfur, tin compounds, polyester resins, some paints and some silicone rubbers may inhibit surface cure of this product. Perform a test cure on an identical surface to determine that complete curing and good release are obtained.
Technical Bulletin: Magikmold® P-500 Series Technical Data Sheet
Safety Data Sheets: Magikmold® P-508 Catalyst & Base SDS