Magikmold® U-740 is a room-temperature curing (RTV), two-part, liquid urethane rubber designed for the manufacture of flexible molds and parts. This rubber has a Shore A40 hardness, 20-minute pour time, and 16-hour demold time.
Magikmold U-740 is a pourable rubber, but can be thickened with Fumed Silica to make brush-on molds.
Common Applications & Casting Materials
Magikmold U-740 molds are often used in:
- Concrete Casting for home decor, sculpture, and more
- Gypsum Plaster Casting for artistic and restoration projects
- Wax Casting for sculpture reproduction and candle-making applications
- Resin Casting for sculpture reproduction, prototyping, and much more
Magikmold U-740 rubber can also be used to make finished parts, including:
- Prototypes parts
- Industrial parts like gaskets and bushings
Release agent is generally not necessary for casting plaster and some waxes in U-700 Series molds. For resin casting (e.g., Magikast® Fast Cast Resins), first spray the mold with a suitable release agent (e.g., Stoner E-236 Urethane Mold Release) and brush with a dry brush to ensure thorough coverage. For concrete casting, use a suitable form release – avoid solvent-containing release agents as they can cause the mold to shrink or swell.
|Mix Ratio by Weight||1 Part A : 1 Part B|
|Pour Time||20 min.|
|Demold Time @ 77°F||16 hr.|
|Mixed Viscosity||2,500 cP|
|Specific Volume||27.5 in³/lb|
|Tensile Strength||330 psi|
|Die C Tear Strength||75 pli|
WARNING: This product can expose you to chemicals including Toluene diisocyanate (TDI), which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.
Technical Data Sheet: Magikmold® U-700 Series Technical Data Sheet