Custom Mixing and Blending Services

NorthStar Elastomers offers optimized (over nearly 4 decades) custom mixing and blending technologies to create additives, bases and finished polymer specialties, adhesives and rubbers. Our strengths include highly viscous (to 500,000 cps @3250 F – we can discuss higher viscosity projects), self-adhesive, wide temperature range, water resistant hot melts, sealants and coatings as well as high performance rubbers.

Demonstrated capabilities include toll production for major global manufacturers seeking our unique, powerful, specialized, high energy equipment for mixing, masticating, dispersing, dissolving and blending very high viscosity materials.


  • Polymer Mixing
  • Rubber Thinning – high to low percent solids
  • Custom Manufacturing
  • Product Development or Enhancement
  • Toll Production/Private Labeling of finished products

Mixer Capacity:

  • Batch size – 500 pounds to 10,000 pounds
  • Movable & double blades
  • Patterson, Perkins, Henshel mixers
  • Hardness range – wide specification
  • Temperature range – max 500ºF

Mixing Services:

  • Cold Blending
  • Low Shear
  • High Shear
  • Multi Blending – colors on request
  • Thinning

Support Services:

Receiving and shipping tank wagons to totes, drums, pails, boxes, multi-item kits.
External testing and consulting: Adherent Laboratories, Aspen Laboratories, Columbia Consultants

Organic Rubber Polymers:

  • NR
  • EPDM
  • SBR
  • Butyls
  • Neoprene
  • Kraton

Production Runs:

  • Specialty and Prototype
  • Low and High Volume
  • Small, Large and Long Run
  • Large Scale Production Run

Internal Testing:

  • Penetration
  • Hardness
  • Standard Viscosity and Thermosel
  • Solids %
  • Moisture Balance