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Ecoflex™ 5

Mold Max™ XLS™ II vs. Ecoflex™ 5 vs. Epsilon™ PRO

Super-Soft, Addition Cure Silicone Rubber

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Epsilon™ PRO

Mold Max™ XLS™ II vs. Ecoflex™ 5 vs. Epsilon™ PROEcoflex™ 5

High Performance Impact Resistant EPS Foam Coating

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Mold Max™ XLS™ II

Mold Max™ XLS™ II vs. Ecoflex™ 5 vs. Epsilon™ PROEcoflex™ 5 versus Epsilon™ PRO

eXtra Low-Shrinkage Silicone Mold Rubber

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy and Urethane Coatings
  • Silicone Rubber - Tin Cure
Mixed Viscosity13,000 cps4,000 cps30,000 cps
Mix Ratio By Volume1A:1B2A:1BN/A (gram scale required)
Pot Life1 minute22 minutes40 minutes
Cure Time5 minutes16 hours24 hours
Shore D Hardness65
Shore A Hardness530
ColorTranslucentClear AmberBlue
Disclaimer
Although we do our best to ensure the accuracy of this Compare Tool, Smooth-On offers no warranty either expressed or implied as to the reliability of the information contained herein. Smooth-On assumes no liability for loss or damage associated with use of the Compare Tool. If this is a critical project, we encourage you to review all of the technical data below and contact our Technical Service department with any questions or concerns.

All Technical Data

Ecoflex™ 5Epsilon™ PROMold Max™ XLS™ II
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy and Urethane Coatings
  • Silicone Rubber - Tin Cure
Mixed Viscosity13,000 cps4,000 cps30,000 cps
Mix Ratio By Volume1A:1B2A:1B
Mix Ratio By Weight1A:1B100A:44B100A:10B
Pot Life1 minute22 minutes40 minutes
Thin Film Working Time35 minutes
Thin Film Recoat Time3 hours
Cure Time5 minutes16 hours24 hours
Shore D Hardness65
Shore A Hardness530
Specific Gravity1.07 g/cc1.11 g/cc1.22 g/cc
Specific Volume25.8 cu. in./lb.25.0 cu. in./lb.22.7 cu. in./lb.
ColorTranslucentClear AmberBlue
Die B Tear Strength75 pli110 pli
Tensile Strength350 psi550 psi
Elongation @ Break1,000 %375 %
100% Modulus15 psi95 psi
Shrinkage<.001 in. / in.0.001 in. / in.
Useful Temperature (min)-65 °F-65 °F
Useful Temperature (max)450 °F400 °F
Volume Resistivity9.000000E+15 ohm/cm
Dissipation Factor, 100Hz0.002
Dielectric Strength>360 volts/mil
Dielectric Constant, 100Hz3.4
Thermal Conductivity0.24 W/M*K

Product Description

Ecoflex™ 5

Ecoflex™ rubbers are platinum-catalyzed silicones that are versatile and easy to use. Ecoflex™ rubbers are mixed 1A:1B by weight or volume and cured at room temperature with negligible shrinkage.  Low viscosity ensures easy mixing and de-airing. Dispense using our convenient dispensing cartridges. Cured rubber is very soft, very strong and very “stretchy”, stretching many times its original size without tearing and will rebound to its original form without distortion.

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Epsilon™ PRO

Epsilon™ PRO is a thixotropic epoxy coating that self-thickens for brushing onto a variety of surfaces.  Compared to original Epsilon™, Epsilon™ PRO offers a longer working time and cured epoxy is semi-rigid, offering better impact resistance.  Mix ratio for Epsilon™ PRO is 2A:1B by volume (100A:44B by weight).  A gram scale is not needed to use this product.

Applied in thin layers, mixed material holds a vertical surface without sagging or slumping. Material wets out uniformly over different surfaces.  Pot life is 22 minutes, with a re-coat time of 3 hours.  All layers should be allowed to cure for 16 hours at 73° F / 23° C and can be accelerated with mild heat.  Epsilon™ PRO is clear and can be easily colored using Ignite™ or UVO™ colorants.  Cured coating has a gloss finish and can be sanded, primed and painted.

Applications: Epsilon™ PRO is suitable for use as a protective, impact resistant coating for EPS or polyurethane foam. It can also be applied to plaster, concrete, wood and fabrics. This product is not sensitive to moisture / humidity and contains no VOC’s. 

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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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Silicone Rubber - Tin Cure ›

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