Magikmold® U-725 is a room-temperature curing (RTV), two-part, liquid urethane rubber designed for the manufacture of flexible molds and parts. U-725 is the softest option in the Magikmold U-700 urethane rubber series. This rubber has a Shore A25 hardness, 20-minute pour time, and 16-hour demold time.
Magikmold U-725 is a pourable rubber, but can be thickened with Fumed Silica to make brush-on molds.
Common Applications & Casting Materials
Magikmold U-725 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-725 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||200 psi|
|Die C Tear Strength||50 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 Bulletin: Magikmold® U-700 Series Technical Data Sheet