Name: Magikmold<sup>®</sup> U-725 Urethane Rubber
SKU: RMSU725
Availability: InStock

Magikmold^® U-725 Urethane Rubber

$39.00 – $455.00

Magikmold^® U-725 is a room-temperature curing (RTV), two-part, Shore A25 urethane rubber that can be used for many mold making and casting applications. U-725 is the softest rubber in the Magikmold^® U-700 urethane rubber series.

4 kit sizes available.

FREE SHIPPING ON ALL SIZES. ONLINE ORDERS ONLY.

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.

Physical Properties

Type	Polyurethane
Mix Ratio by Weight	1 Part A : 1 Part B
Shore Hardness	A25
Pour Time	20 min.
Demold Time @ 77°F	16 hr.
Cured Color	Amber
Mixed Viscosity	2,500 cP
Specific Volume	27.5 in³/lb
Specific Gravity	1.01
Tensile Strength	200 psi
Elongation	730 %
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.