PROTAVIC METASIL 5023 is a two-component room temperature silicone mold making material offering excellent detail reproduction, low viscosity, high tear/cut resistance and excellent release for long-lasting molds. METASIL 5023 has high temperature and chemical resistance with excellent flexibility and low shrinkage which makes it suitable for all types of cast plastics.

METASIL 5023 is designed to have high durometer with excellent release allowing for easy demolding of even highly detailed models. PROTAVIC recommends a 5-15% solution of Vaseline or Petroleum in Naptha or Xylene as a release coat.

The release solution can be brushed onto the model. Allow the solvent to flash off. If the model is to be encapsulated, an appropriate box or fixture should be developed. The box or fixture should be coated with the release agent as well as to prevent mechanical abrasion. The METASIL 5023 should be applied to an obscure portion of the model to test for proper release and compatibility.


Cure Type Addition
Form Flowable
Cured Form Rubber
Mix Ratio Addition Flowable Rubber 10:1
METASIL 5023 is good for use with the following casting materials: Acrylic, Concrete, Gypsum Wax, Epoxy Polyester, Polyurethane, PVC, wood Pulp
METASIL 5023 is suitable for: Laminate Molding, Bladder and Bag Molding, Pad Printing, Prototype Tooling, Figurines, Furniture, Art, Castings, etc.


Metasil 5023 Resin Metasil 5023 Activator
Viscosity, cps 15,000 15,000
Sp. Gravity 1.10 1.10
Color Gray Gray Clear Clear
Form Liquid Liquid
Mix Ratio 10:1
Mixed Viscosity, cps 12,000
Working time, hrs 2.5
Cure Time @ 25ºC 4 days
Cure Time @ 65ºC 2 hrs.
Cure Time @ 100ºC 30 min.
Cure Time @ 150ºC 15 min.
Durometer, Shore A 30 +/- 5
Tensile, psi 725
Elongation % 425
Tear B, ppi 115
Linear Shrinkage, % 0.1%

Handling Instructions: Weigh 10 parts of activator to 100 parts resin. Mix for a period of time until mixing is complete. Degass for 10 minutes under a vacuum of 25-29 inches of Mercury. Pour slowly into mold box so as not to entrap air. Cure according to the cure schedule desired.

Note: Certain substances may inhibit the cure of Metasil 5023 by direct or indirect contact. Metallic salts, butyl, PVC plasticizers, chlorinated rubber, amines and sulfur containing materials may all inhibit the cure.

Storage and Handling: PROTAVIC Metasil 5023 has a shelf-life of six months from date of shipment when stored in original unopened containers at a temperature below 25ºC.

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Technical information and recommendations made by Protavic America, Inc. concerning products and uses or applications thereof, are based on reliable laboratory tests and are believed to be accurate. No warranty, however, is expressed or implied, nor is any warranty expressed or implied as to results to be obtained from use of said materials, whether used singly or in combination with other products. No statements made are to be construed as constituting a license under any existing patent.