Silicone Rubber - Platinum-Cure

View All Products Specification Table
demolding silicone mold

Use PlatSil® Series liquid silicone rubbers to manufacture high-performance silicone molds and silicone parts.

PlatSil® rubbers are platinum-cured (also known as addition-cure), room temperature-curing silicones that cure to flexible, high-strength rubbers. PlatSil® molds offer excellent release properties and release agent is not necessary when casting most materials. Compared to tin-cured silicone rubbers, platinum-cured silicones exhibit long library life and low shrinkage on cure.

Silicone rubber is an excellent mold material, but select silicone products are also widely used as a casting medium in applications including medical modeling, special effects, and orthotics.

View our new Medical Modeling and Simulation brochure for more information.

Technical Data Bulletin for our standard line of PlatSil Silicone Gels

Technical Data Bulletin for our PlatSil Silicone Gels including Dry Versions

Select a product line below to learn more or continue to scroll to review product line features and common applications:

Product Options


Standard Mold Making & Casting Silicone Rubbers

PlatSil® 71 & 73-Series platinum-cured silicone rubbers offer a variety of Shore Hardness options, pour times, demold times, and 1A:1B and 1A:10B mix ratios.


Fast-Setting Silicone Rubbers

PlatSil® FS-Series silicone rubbers are fast-setting, high-performance silicones with long pour times relative to their cure speed. This allows for fast turn-around of molds and parts with sufficient time to mix and pour.


Silicone Rubbers for Film, Television & Theater: Theatrical Prosthetic Appliances, Makeup FX & Special Effects Applications

PlatSil® Gels are the industry standard in the special effects industry for creating life-like theatrical prosthetic appliances for film, television and theater. They are also used for lifecasting, prop making and general silicone mold making.

PlatSil® SiliGlass is a super-clear, glass-like rubber for a broken glass special effect.


High-Performance Silicone Rubbers with Excellent Tear & Tensile Strength

PlatSil® HTS-Series are high-performance silicones with excellent tear strength, tensile strength and elongation properties. These silicones stand-up to the rigors of high-volume production environments and repetitive demolding or stretching.


Food Contact Silicone Rubbers

These silicone rubbers were tested by an independent laboratory and were found to comply with 21 CFR 177.2600 (as published in the Code of Federal Regulations) for rubber articles intended for repeated use food contact surfaces when accurately measured, thoroughly mixed, and fully cured. Learn more here.

Product Line Features

  • Type: Platinum-cured (addition-cured) silicone rubber
  • Room-temperature curing (RTV)
  • A wide range of durometers
  • 1:1 and 1:10 mix ratios
  • High temperature resistance (up to 450°F)
  • Low and high viscosity options
  • Low shrinkage
  • Translucent options
  • Product options that comply with 21 CFR 177.2600 for repeated use food contact surfaces
  • Skin-safe options in the PlatSil® Gel Series
  • Accelerators, retarders, thickeners, pigments and other accessories that adjust the liquid and cured properties of the silicone
  • Silicone molds can be used to cast a variety of materials, including: polyurethane, polyester and epoxy resin, polyurethane foam, low melting metals, concrete, plaster, wax, platinum-cured silicone, and more

Application Examples

Need assistance in selecting a product?

We’re here to help you along the way.