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Mold Max™ XLS™ II

Mold Max™ XLS™ II Technical Specifications

eXtra Low-Shrinkage Silicone Mold Rubber

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All Technical Data

Mold Max™ XLS™ II
Product Type
  • Silicone Rubber - Tin Cure
Mixed Viscosity30,000 cps
Mix Ratio By Weight100A:10B
Pot Life40 minutes
Cure Time24 hours
Shore A Hardness30
Specific Gravity1.22 g/cc
Specific Volume22.7 cu. in./lb.
Die B Tear Strength110 pli
Tensile Strength550 psi
Elongation @ Break375 %
100% Modulus95 psi
Shrinkage0.001 in. / in.
Useful Temperature (min)-65 °F
Useful Temperature (max)400 °F
Volume Resistivity9.000000E+15 ohm/cm
Dielectric Constant, 100Hz3.4
Dielectric Strength>360 volts/mil
Dissipation Factor, 100Hz0.002
Thermal Conductivity0.24 W/M*K

Product Description

Mold Max™ XLS™ II

Mold Max™ XLS™ II is a Shore 30A tin-catalyzed silicone mold rubber that exhibits very low long-term shrinkage. XLS™ II molds last longer than other silicones in production when casting chemically harsh resins such as epoxies and polyesters as well as urethane foams.

Mix ratio is 100A:10B by weight. Pot life is 40 minutes and cure time is 24 hours at room temperature. Mold Max™ XLS™ II silicone will reproduce the finest detail and is suitable for a variety of industrial and art related applications including making production molds for, reproducing prototypes, furniture, sculpture and architectural elements. Mold Max™ XLS™ II can be thickened with THI‑VEX™ additive for brush-on applications.

Vacuum degassing mixed material using a vacuum pump and chamber to remove entrapped air is recommended.

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