GP-58 Hard Inert Silicone Wax

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Price is dependant on quantity, please request a quote for more information. If you are interested in samples, please refer to our sample price policy.


GP-58 is a 100% active organo silicone wax copolymer. This unique product is recommended for use as a lubricant, mold release agent and internal lubricant for plastics. When combined with aliphatic solvents, such as mineral spirits, GP-58 forms a dry, colorless film on substrates. This film is stable and will not break down in the presence of water. The lack of any dimethyl silicone removes the problems of orange peel, fisheyes, or similar effects normally associated with dimethyl silicone. GP-58 has the following special features:

  • Acts as an Antiblocking Coating when Applied to Uncured Rubber Product
  • Unique Silicone Copolymer Provides Excellent Metal on Metal Lubrication
  • Acts as a Rubber and Plastic Mold Release Agent Lubricant
Typical Properties
White Solid
Wt. % Active
Weight/Gallon @ 25°C
7.1 lbs
Aliphatic Hydrocarbon Solvents
Specific Gravity
Molecular Weight (Calculated)
12600 amu
Melting Point
109°F - 110°F
Viscosity (cPs) @ 70°C
230.2 cP


Rubber Industry: Release Agent
Green Rubber Detackifier
Band Ply Lubricant Lubricity Additive
Mandrel Lubricant
Plastics Industry: Release agent
Internal Lubricant and Mold Release Agent for Rubber Latex
(Molding and Dipping)
Paper Industry: Antiblocking
Paperboard Ice Release
Carbon Paper: Antiblocking
Typewriter Ribbon: Antiblocking-Aqueous Coatings
Textile Industry: Release Agent
Water Repellent
Thread Lubricant
Fiber Lubricant
Printing Inks: Release Agent-Aqueous Systems
Water Repellent
Candle Industry: Internal Release Agent
Glass Bottle Molding: Improve Surface Lubricity, Reduce Scratching During Filling
Aluminum Production Grinding: Lubricate Sliding Surfaces During Extruding, Deep Drawing and Cutting or Grinding
Machine Shop: Lubricate Cutting Tools, Taps, Drills, etc.
Impart Rust Protection by Formation of Wax-like Film

Processing and Safety Guidelines

GP-58 may be converted to a solvent based product by first melting the wax, and with stirring, adding to a solution of mineral spirits. A stable 10% active product can be made this way. Note - use caution with flammable or combustible materials. GP-58 may also be blended with other Genesee Polymers' silicone fluids for use as internal processing aids in the rubber manufacturing industry. For safety requirements, refer to Safety Data Sheet.


GP-58 is supplied in 5-gallon (35 lbs.) pails and 55-gallon (390 lbs.) drums. No special storage is required.