Silicone, Rubber and Elastomer Parts

With our specialist Da/Pro Rubber for the manufacturing of high quality, tight tolerance rubber and plastic components we can offer medical grade materials and processes tailored to our customers' specifications.

  • Class 10,000 clean room for moulding parts requiring special handling
  • Assistance in qualification procedures involving processes and materials
  • Precision moulding for tight tolerance critical components
  • DaPro's chemists are available to custom compound elastomers for multiple applications 
  •  Internal hole configurations with minor diameters as small as .017" x .75" (approximately 0,43 mm x 19 mm) long and internally expanded up to three diameters
  • Many elastomers can be used
  • Shore hardness range from 30 A to 90 A
  • Secondary flash removal
  • Used in connectors for the Medical, Aerospace, Electronics, and many other industries
  • custom compounds designed to your one-way sealing devices, such as duckbill valves, umbrella valves, flapper valves, etc. 
  • assistance in design and material selection to reduce time from concept to finished product
  • Mould diaphragms with a uniform convolute thickness as thin as 0.004 inches (0.10 mm) held to +/- 0.0015 inches (0.04 mm)
  • Moulded diaphragms have superior sensitivity, repeatability and flexibility in low-pressure instrument and control applications
  • Diaphragms may be designed to have either integral molded points to attach plastic or metal stiffeners
  • Da/Pro can mould or bond metal or plastic retainer plates for one-piece assembly
  • Our custom inspection and quality control group can perform many tests necessary to assure trouble free assembly in your operations
  • Consistent, excellent quality custom seals and gaskets
  • Produced with precise tolerances and damage to sealing surfaces is eliminated because secondary deflashing operations are not required
  • Custom compounding can be developed that fits your products operating environment whether it is chemical, heat or mechanical resistance
  • Our engineering staff can help with design of tooling to reduce the cost of most seals and gaskets
  • Custom O-rings in a variety of sizes
  • Solutions for your O-ring applications, with custom compounds that will work for your specific applications
  • O-rings as small as 0.051 inches O.D. (1,30 mm) to as large as 20 inches O.D. (508 mm)
  • Damage to the O-ring’s surface is eliminated because secondary flash removal operations are not required
  • Engineering and commodity plastic injection moulding
  • High temp plastic moulding
  • TPE overmoulding
  • Insert moulding
  • Custom parts moulded to your specification
  • Sub-Assembly
  • Rapid Prototyping using FDM – Fused Deposition Modelling


Injection Molding
Plastic injection molding involves a thermoplastic process where the raw material in pellet form is heated then pushed through a heated barrel where it is melted. The melted material is forced through a nozzle into a mold cavity or a runner system. The cavity is created in the shape of the desired component until it is cooled enough to retain its shape. The mold opens, the part ejects and the process starts over.

Liquid Injection Molding
Liquid silicone rubber (LSR) is a thermoset process where liquid silicone material is supplied through an injection nozzle. The liquid silicone rubber is mixed in line with the curing agents and is injected into the mold cavity using a cold runner to prevent adhesion to the screw. The liquid silicone enters the cavity of the mold and fills the predefined shape. Under heat and pressure, the rubber cures. The part is then ejected from the cavity and the LIM molding cycle restarts.

Micro Molding
Like many other industries, medical industries are continually manufacturing smaller devices demanding the need for extremely high quality and tight tolerances. We offer precision micro molding parts, including o-rings, valves, and custom shapes. These parts can weigh less than .00029 grams and are less than .0011"(0,028mm) in diameter requiring precision tooling and a controlled molding process. The Da/Pro Process allows micro molding parts that are high quality, tight tolerance, and virtually flash free. This process reduces the need for secondary operations such as cryogenic de-flashing which could potentially damage intricate parts. 


Amongst others: Butyl, EPDM, Poly Isoprene, Silicone, Fluorosilicone, Viton, Neoprene and NBR