Tumedei and the Gulf Rubber group processes a wide range of elastomers, thermoplastic rubbers (TPR’s) and engineering thermoplastics. Our experienced chemist engineers can advise on suitable materials for your application. Materials currently in use include:


  • Natural rubber and Polyisoprene (NR)
  • Styrene Butadiene rubber (SBR)
  • Nitrile (NBR)
  • Ethylene Propylene Diene Monomere (EPDM)
  • Neoprene (CR)
  • Polyacrylate (ACM)
  • Hydrogenated Nitrile (HNBR)
  • Silicone (VMQ)
  • Fluorosilicone (FMQ)
  • Fluoroelastomer (FKM)
  • Polyurethan (AU)


  • Polyurethane (PU)
  • Santoprene
  • Polycarbonate
  • Kraton
  • Geolast
  • PEX – Crossed linked Polyetheylene (Solvay)
  • Acetal – Polyoxymethyl (Delrin, Ultrafom , Hostaform)
  • Nylon – Polyamide (Zytel, Ultramid , Technyl)
  • Noryl – Polyphenylene oxide (Sabic)
  • PPA – Polypthalamide (Grivory , Amodel , Zytel HTN)
  • Ultem – Polyetherimide (Sabic)
  • PSU – Polysulfone (Udel)
  • PPSU – Polyphenylsulfone (Radel)

FABRIC MATERIALS (knitted or woven fabrics used for production of reinforced membranes) :

  • Polyester fabric
  • Polyamide fabric
  • Nomex fabric
  • Kevlar fabric
  • Carbon fibre fabric
  • Glass fibre fabric

Drinking Water Approvals

Tumedei and the Gulf Rubber Group have developed many elastomeric and thermoplastic materials for use in drinking water.

Today the company can provide a wide variety of compounds that have drinking water approvals in Europe, South East Asia and the United States. We can provide a single material that will meet the drinking water requirements in various countries thus simplifying the selection and inventory for manufacturers of products such as valves, pumps and many types of water fittings.

Current approvals include (but not limited to) :

  • WRAS, WRC & BS6920 (United Kingdom)
  • KTW (Germany) & W270
  • AFNOR ACS (France)
  • NSF61 (USA)
  • AS4020 (Australia & NZ)

Materials currently holding approvals include the following in a wide range of hardness:

  • EPDM
  • Nitrile (NBR)
  • Silicone (VMQ)
  • Natural Rubber (NR)
  • Styrene Butadiene Rubber (SBR)
  • Fluoroelastomer (FKM)
  • Acetal
  • Polyolefin