At PTG Silicones, we feature a state-of-the-art manufacturing facility that’s fully equipped for automated, world-class silicone molding. We’re capable of liquid silicone rubber (LSR/LIM) molding, LSR over-molding, elastomer molding, high-performance thermoplastic molding, prototype molding, and production molding. We also offer material specification services. We can handle mold dimensions as small as 8” x 8” x 10” and as large as 20” x 24” x 36”; achieving tolerances as tight as +/-0.005”. Our equipment can work with molds that contain 1 to 128 cavities. They’re also capable of clamping forces as low as 25 tons and as high as 160 tons. In addition, we can handle shots sizes ranging from 0.5g to 200g within a single injection stroke. All of our molds are precision engineered to achieve tight tolerances with minimal flash.

We’ve outfitted our facility with a wide range of molding and infrastructure equipment from prominent manufacturers in the industry. This includes Arburg electric-hydraulic molding machines, Graco pumping systems, robotics and automation from Stäubli, Cognex and Keyence machine vision systems, Novatec material handling systems and dryers, and Mitutoyo metrology equipment. With our Class 100,000 cleanroom, we can conduct sterile molding processes that are free of dust, microbes, particles, and vapors. We have years of experience working with an array of materials including various silicones, nylon, PEEK, polycarbonate, PBT, PET, thermoplastic elastomers, thermoplastic rubbers, and much more. Our services span the entire product development process; offering assembly, slitting and die cutting, engineering, material selection, mold specification, post curing, surface treatment, and pre-production tooling. From single prototypes to high volume runs, we’re geared to handle virtually any production capacity.

By employing the latest automation technologies, we’re able to conduct lights out manufacturing in order to improve quality and reduce the customer’s costs. Our Six Sigma certified team is always seeking new ways to increase the value of our services. We’re environmentally conscience and practice lean manufacturing methods in order to reduce waste. Our molds are used in applications such as gaskets, flow control valves, and seals. From health care to industrial electronics, we’ve supported numerous industries worldwide. We can provide full compliance with standards by ISO 9001:2015 and ISO 13485:2016. To learn more about our silicone molding capabilities, please contact us or refer to the table below.


General Capabilities

  • Liquid Silicone Rubber Molding (LSR/LIM)
  • Thermoplastic with LSR Over-molding
  • Thermoplastic Elastomer Molding

  • High Performance Thermoplastic Molding
  • Prototype Molding
  • Material specification

Mold Process Type

  • Insert Molding
  • Micro Molding
  • Injection Molding

Liquid Injection Molding (LSR/LIM)

A process that involves the high pressure impingement mixing of two or more reactive liquid components and injecting into a closed mold at high pressure.


Overmolding injection molding is the ability to produce complex moldings from two different polymers at the same time during one machine cycle. This has the benefits of creating moldings with more than one color, or with different materials combined in one molding.


  • Silicone:
    • LSR/LIM Materials
    • Fluorosilicones
    • Self-Bonding LSR/LIM Materials
    • Pigments
    • Silicone Rubber
  • Polyamide (Nylon)
  • Polyaryletheretherketone (PEEK)

  • Polycarbonate (PC)
  • Polybutylene Terephthalate (PBT)
  • Polyethylene Terephthalate (PET)
  • Polyetherimide (PEI – ULTEM)
  • Thermoplastic Elastomers
  • Thermoplastic Rubber
  • Thermoset

Manufacturing Equipment And Facility Infrastructure

  • Arburg Electric-Hydraulic Molding Machines
  • Class 100,000 Cleanroom
  • Graco Pumping Systems
  • Stäubli Robotics and Automation
  • Novatec Material Handling System
  • Mitutoyo Video Vision Measurement
  • Advantage Chiller and Mold Temperate Controllers

Mold Length

  • Min: 8 in
  • Max: 20 in

Mold Width

  • Min: 8 in
  • Max: 24 in

Mold Height

  • Min: 10 in
  • Max: 36 in

Clamping Force

  • Min: 25 tons
  • Max: 160 tons

Shot Size

The maximum weight of plastic that can be displaced or injected by a single injection stroke. Generally expressed as ounces of polystyrene.

  • Min: 0.5 g
  • Max: 200 g

Shrinkage Allowance

The dimensional allowance which must be made in molds to compensate for shrinkage of the material on cooling or during the debinding operation.

Number of Cavities

The number of cavities in the mold used to produce multiple products in one molding cycle.

  • Min: 2%
  • Max: 5%
  • Min: 1 cavities
  • Max: 128 cavities

Lead Time

  • Quoted on job by job basis
  • Emergency Services Available
  • Rush Services Available

Intended Application

  • Gaskets
  • Flow Control Valves
  • Seals
  • Sealing Solutions

Additional Services

  • Assembly
  • Cleanroom Assembly
  • Cleanroom Molding
  • Slitting and Die Cutting
  • Engineering
  • Mold Specification
  • Process Development
  • Product Development Assistance
  • Prototype
  • Pre-Production Tooling
  • Post Curing
  • Surface Treatment

Production Volume

  • Specialty Production Shop
  • Prototype Through High Volume

Additional Information

Industry Focus

  • Healthcare
  • Automotive
  • Transportation
  • Industrial/Electronics
  • Appliance
  • Food Packaging
  • Dental
  • Consumer Goods
  • Electronic
  • Medical
  • Optical – LEDs
  • Lighting – LEDs

File Formats

  • IGES
  • Initial Graphics Exchange Specification, ANSI file format.
  • Pro-E or Pro/Engineer (DRW,PRT,XPR)
  • PDF
  • JPEG
  • Parasolid (X_T)
  • STEP
  • Standard for the Exchange of Product Model Data

Industry Standards

  • ISO 9001:2015
  • ISO 13485:2016
  • Class 100,000 Cleanroom (ISO 8)
  • 100,000 Parts Per Cubic Meter


  • Lights Out Manufacturing
  • Lean Manufacturing