Magikmold® P-525 Platinum Cure Silicone

Description

Magikmold
®
P-525
is a platinum-cured, room temperature curing (RTV), silicone rubber designed for the manufacture of high-performing, flexible molds. This two-part (Catalyst & Base), liquid silicone rubber has a Shore Hardness of A25, a pour time of ~15 minutes, and a demold time of ~4 hours.
Magikmold
®
P-525 molds are commonly used to cast the following materials:
Urethane (polyurethane) plastic and rubber
Plaster
Polyester Casting Resin
Cement, Concrete
Epoxy
Soap
Wax
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.
Physical Properties
Type
Platinum-cured (addition-cure)
Mix Ratio by Weight
1 Part Catalyst : 1 Part Base
Shore Hardness
A25
Pot Life
15 min.
Demold Time @ 77°F
4 hr.
Cured Color
Blue
Mixed Viscosity
3,400 cP
Specific Volume
24.7 in³/lb
Specific Gravity
1.12
Tensile Strength
485 psi
Elongation
440 %
Die B Tear Strength
165 pli
Die T Tear Strength
39 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.