Our Products

Sustainable Natural Rubber and Latex

We connect the North American consumer directly with West African and Asian natural rubber producers, sustainably and efficiently.

Chemicals and Resin

We provide chemicals and other ingredients needed by our customers for processing rubber. We primarily source ingredients from Asia.

Fabrics and Yarn 

We connect the North American consumer directly with global producers of fabrics and yarns.

Global Sourcing

Our International Partners

Simko’s growth has been organic and focused on the company doing what we do best – collaborating with customers to supply rubber, chemicals, and fabrics to their specifications and meeting customer supply chain needs.


RSS - Ribbed Smoked Sheets

Made from coagulated latex sheets, the grades of RSS are RSS1 to RSS5 and vary by  elasticity, color and purity on the basic per International Standard of IRQPC (Green Book). These grades are determined and classified through visual examination by experienced sorters and inspectors.

  • RSS 1
  • RSS 3

TSR - Technically Specified Rubber

Also known as Block Rubber, TSR can be produced from both field latex and field coagulum of NR (cuplump) or a blend of both. Block Rubber is graded accordingly to precise technical parameters including dirt, ash, nitrogen, volatile matter and its properties such as Wallace Plasticity (PO), Mooney Viscosity, Lovibond, and Plasticity Retention Index (PRI). We represent factories qualified under the major TSR schemes including Standard Thai Rubber (STR), Standard Indonesian Rubber (SIR), Standard Malaysian Rubber (SMR) and Standard Vietnamese Rubber (SVR).

  • TSR CV60
  • TSR CV50
  • TSR 3L
  • TSR L
  • TSR 10CV
  • TSR 20CV
  • TSR 10
  • TSR 20
  • Pale Crepe

We import from producers located in:

  • Ivory Coast
  • Vietnam
  • Indonesia
  • Malaysia
  • Thailand
  • Cambodia
  • Ghana
  • Guatemala
  • Sri Lanka
  • Liberia
  • Nigeria


Derived from field latex,  it is processed using centrifuge methods. It contains 60% of Dry Rubber Content (DRC). Types of latex are differentiated by varying the amount used of preserved ammonia used such as High Ammonia (HA) and Low Ammonia (LA/LATZ). The concentrated latex are marketed under strict technical specification, based on dry rubber content, non-rubber solid, alkalinity, mechanical stability and other parameters relating to ISO2504 specification.

  • High Ammonia
  • Low Ammonia
  • Prevulcanized
  • Ammonia Free
  • TMTD Free

We import from producers located in:

  •  Thailand
  • Malaysia
  • Vietnam
  • Indonesia
  • Guatemala


We source rubber chemicals, fabrics and yarns from many global origins.

  • CBS
  • DCBS
  • DOTG
  • DPG
  • DPG SS
  • DTDM
  • JPPD
  • MTBS
  • PVI
  • TBBS
  • TMQ
  • TMTD
  • TMTM
  • Resins
  • Silanes
  • Stearic Acid
  • Tire Fabrics
  • Tire Grade Yarns
  • And More…