The Polydur™ tooling system is now available from John Burn.

Polydur™ is a unique tooling system that provides lightweight, accurate laminates in a very short working time.  Polydur™ has no health and safety aspects, is non toxic, has no smell and all its components are water soluble. Polydur™ was developed over ten years ago and is now used worldwide by a large number of industries and include tooling, automotive, aerospace, composites, art, theatre and film sets and many other diverse applications.
 

The system consists of an aqueous emulsion of acrylic resin (EM25) that is mixed with a specially formulated gypsum (LG) combination at a convenient mixing ratio of 100/50. This specific combination is the key to the accuracy and short demould time of the Polydur™ system and also the final physical properties and the suitability for many tooling applications.

The working techniques and characteristics are very similar to normal epoxy or polyester resin laminating applications and consist of a thixotrope mix for a surface coat (SGP/L) and a low viscosity mix for laminating. The laminating mix wets out glass fabrics and chopped strand mat, and very good results are obtained using 300gm Neomat. The average weight of a Polydur™ laminate using 2 layers neomat is approximately 7.5kg/m². Two layers is suitable for most laminates and very large laminates can be reinforced with suitable stiffening ribs rather than extra layers of laminate.

The Polydur™ surface is a plastic type surface from which resin laminates or castings can be taken. However, the laminating system also bonds to conventional epoxy gel coats so epoxy faced Polydur™ laminates can be quickly produced.

The resulting laminates are de-mouldable in approximately 3 hours and can be used within 2 hours of de-moulding.

 Main Advantages

• Low cost laminates and tooling from clay, wood & resin
• Faster & easier to use than conventional resins
• Accurate with no shrinkage
• High temperature resistance
• Fire retardant
• Usable in 5 hours
• Very low hazard - all equipment can be cleaned using water

To order or for more information, see our Products section or contact John Burn for up-to-date information on the full range of John Burn products.

Polydur™ is a registered trade name of Denaco Imports