Magikmold® U-780 is a room-temperature curing (RTV), two-part, liquid urethane rubber designed for the manufacture of flexible molds and parts. U-780 is the hardest rubber in the Magikmold U-700 Series. This rubber has a Shore A80 hardness, 45-minute pour time, and 16-hour demold time.
Magikmold U-780 is a pourable rubber, but can be thickened with Fumed Silica to make brush-on molds.
Magikmold U-780 rubber is often used to make:
- Concrete Stamps and Texture Mats
- Prototypes parts
- Industrial parts like gaskets and bushings
- Duplicate masters
Plaster and some waxes can generally be cast into U-700 urethane molds without any release agent, but most concrete mixes and polyurethane resins require a suitable release agent, like Stoner E-236 Release Agent.
|Mix Ratio by Weight||2 Parts A : 1 Part B|
|Pour Time||45 min.|
|Demold Time @ 77°F||16 hr.|
|Mixed Viscosity||7,000 cP|
|Specific Volume||26 in³/lb|
|Tensile Strength||750 psi|
|Die C Tear Strength||120 pli|
WARNING: This product can expose you to chemicals including 4,4′-Methylene bis(2-chloroaniline) (MOCA) and 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